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Pacemakers and Implantable Defibrillators

An arrhythmia is any disorder of your heart rate or rhythm. It means that your heart beats too quickly, too slowly, or with an irregular pattern. Most arrhythmias result from problems in the electrical system of the heart. If your arrhythmia is serious, you may need a cardiac pacemaker or an implantable cardioverter defibrillator (ICD). They are devices that are implanted in your chest or abdomen. A pacemaker helps control abnormal heart rhythms. It uses electrical pulses to prompt the heart to beat at a normal rate. It can speed up a slow heart rhythm, control a fast heart rhythm, and coordinate the chambers of the heart. An ICD monitors heart rhythms. If it senses dangerous rhythms, it delivers shocks. This treatment is called defibrillation. An ICD can help control life-threatening arrhythmias, especially those that can cause sudden cardiac arrest (SCA). Most new ICDs can act as both a pacemaker and a defibrillator. Many ICDs also record the heart's electrical patterns when there is an abnormal heartbeat. This can help the doctor plan future treatment. Getting a pacemaker or ICD requires minor surgery. You usually need to stay in the hospital for a day or two, so your doctor can make sure that the device is working well. You will probably be back to your normal activities within a few days.


PAD see Peripheral Arterial Disease

Peripheral arterial disease (PAD) happens when there is a narrowing of the blood vessels outside of your heart. The cause of PAD is atherosclerosis. This happens when plaque builds up on the walls of the arteries that supply blood to the arms and legs. Plaque is a substance made up of fat and cholesterol. It causes the arteries to narrow or become blocked. This can reduce or stop blood flow, usually to the legs. If severe enough, blocked blood flow can cause tissue death and can sometimes lead to amputation of the foot or leg. The main risk factor for PAD is smoking. Other risk factors include older age and diseases like diabetes, high blood cholesterol, high blood pressure, heart disease, and stroke. Many people who have PAD don't have any symptoms. If you have symptoms, they may include Pain, numbness, achiness, or heaviness in the leg muscles. This happens when walking or climbing stairs. Weak or absent pulses in the legs or feet Sores or wounds on the toes, feet, or legs that heal slowly, poorly, or not at all A pale or bluish color to the skin A lower temperature in one leg than the other leg Poor nail growth on the toes and decreased hair growth on the legs Erectile dysfunction, especially among men who have diabetes PAD can increase your risk of heart attack, stroke, and transient ischemic attack. Doctors diagnose PAD with a physical exam and heart and imaging tests. Treatments include lifestyle changes, medicines, and sometimes surgery. Lifestyle changes include dietary changes, exercise, and efforts to lower high cholesterol levels and high blood pressure. NIH: National Heart, Lung, and Blood Institute

Paget's Disease of Bone

Paget's disease of bone causes your bones to grow too large and weak. They also might break easily. The disease can lead to other health problems, too, such as arthritis and hearing loss. You can have Paget's disease in any bone, but it is most common in the spine, pelvis, skull, and legs. The disease might affect one or several bones, but not your entire skeleton. More men than women have the disease. It is most common in older people. No one knows what causes Paget's disease. In some cases, a virus might be responsible. It tends to run in families. Many people do not know they have Paget's disease because their symptoms are mild. For others, symptoms can include Pain Enlarged bones Broken bones Damaged cartilage in joints Doctors use blood tests and imaging tests to diagnose Paget's disease. Early diagnosis and treatment can prevent some symptoms from getting worse. Treatments include medicines and sometimes surgery. A good diet and exercise might also help. NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Paget's Disease of Breast see Breast Cancer

Breast cancer affects one in eight women during their lives. No one knows why some women get breast cancer, but there are many risk factors. Risks that you cannot change include Age - the risk rises as you get older Genes - two genes, BRCA1 and BRCA2, greatly increase the risk. Women who have family members with breast or ovarian cancer may wish to be tested for the genes. Personal factors - beginning periods before age 12 or going through menopause after age 55 Other risks include obesity, using hormone replacement therapy (also called menopausal hormone therapy), taking birth control pills, drinking alcohol, not having children or having your first child after age 35, and having dense breasts. Symptoms of breast cancer may include a lump in the breast, a change in size or shape of the breast, and discharge from a nipple. Breast self-exams and mammography can help find breast cancer early, when it is most treatable. One possible treatment is surgery. It could be a lumpectomy or a mastectomy. Other treatments include radiation therapy, chemotherapy, hormone therapy, and targeted therapy. Targeted therapy uses substances that attack cancer cells without harming normal cells. Men can have breast cancer, too, but it is rare. NIH: National Cancer Institute

Pain

Pain is a feeling triggered in the nervous system. Pain may be sharp or dull. It may come and go, or it may be constant. You may feel pain in one area of your body, such as your back, abdomen, chest, or pelvis. Or you may feel pain all over, such as when your muscles ache from the flu. Pain can be helpful in diagnosing a problem. Without pain, you might seriously hurt yourself without knowing it, or you might not realize you have a medical problem that needs treatment. Once you take care of the problem, pain usually goes away. However, sometimes pain goes on for weeks, months or even years. This is called chronic pain. Sometimes chronic pain is due to an ongoing cause, such as cancer or arthritis. Sometimes the cause is unknown. Fortunately, there are many ways to treat pain. Treatment varies depending on the cause of pain. Pain relievers, acupuncture, and sometimes surgery are helpful.

Pain Relievers

Pain relievers are medicines that reduce or relieve headaches, sore muscles, arthritis, or other aches and pains. There are many different pain medicines, and each one has advantages and risks. Some types of pain respond better to certain medicines than others. Each person may also have a slightly different response to a pain reliever. Over-the-counter (OTC) medicines are good for many types of pain. There are two main types of OTC pain medicines: acetaminophen (Tylenol) and nonsteroidal anti-inflammatory drugs (NSAIDs). Aspirin, naproxen (Aleve), and ibuprofen (Advil, Motrin) are examples of OTC NSAIDs. If OTC medicines don't relieve your pain, your doctor may prescribe something stronger. Many NSAIDs are also available at higher prescription doses. The most powerful pain relievers are opioids. They are very effective, but they can sometimes have serious side effects. There is also a risk of addiction. Because of the risks, you must use them only under a doctor's supervision. There are many things you can do to help ease pain. Pain relievers are just one part of a pain treatment plan.

Pain, Abdominal see Abdominal Pain

Your abdomen extends from below your chest to your groin. Some people call it the stomach, but your abdomen contains many other important organs. Pain in the abdomen can come from any one of them. The pain may start somewhere else, such as your chest. Severe pain doesn't always mean a serious problem. Nor does mild pain mean a problem is not serious. Call your healthcare provider if mild pain lasts a week or more or if you have pain with other symptoms. Get medical help immediately if You have abdominal pain that is sudden and sharp You also have pain in your chest, neck or shoulder You're vomiting blood or have blood in your stool Your abdomen is stiff, hard and tender to touch You can't move your bowels, especially if you're also vomiting

Pain, Back see Back Pain

If you've ever groaned, "Oh, my aching back!", you are not alone. Back pain is one of the most common medical problems, affecting 8 out of 10 people at some point during their lives. Back pain can range from a dull, constant ache to a sudden, sharp pain. Acute back pain comes on suddenly and usually lasts from a few days to a few weeks. Back pain is called chronic if it lasts for more than three months. Most back pain goes away on its own, though it may take awhile. Taking over-the-counter pain relievers and resting can help. However, staying in bed for more than 1 or 2 days can make it worse. If your back pain is severe or doesn't improve after three days, you should call your health care provider. You should also get medical attention if you have back pain following an injury. Treatment for back pain depends on what kind of pain you have, and what is causing it. It may include hot or cold packs, exercise, medicines, injections, complementary treatments, and sometimes surgery. NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Pain, Chest see Chest Pain

Having a pain in your chest can be scary. It does not always mean that you are having a heart attack. There can be many other causes, including Other heart problems, such as angina Panic attacks Digestive problems, such as heartburn or esophagus disorders Sore muscles Lung diseases, such as pneumonia, pleurisy, or pulmonary embolism Costochondritis - an inflammation of joints in your chest Some of these problems can be serious. Get immediate medical care if you have chest pain that does not go away, crushing pain or pressure in the chest, or chest pain along with nausea, sweating, dizziness or shortness of breath. Treatment depends on the cause of the pain.

Pain, Chronic see Chronic Pain

Pain is a feeling set off in the nervous system. Acute pain lets you know that you may be injured or have a problem you need to take care of. Chronic pain is different. The pain signals go on for weeks, months, or even years. The original cause may have been an injury or infection. There may be an ongoing cause of pain, such as arthritis or cancer. But in some cases there is no clear cause. Problems that cause chronic pain include Headache Low back strain Cancer Arthritis Pain from nerve damage Chronic pain usually cannot be cured. But treatments can help. They include medicines, acupuncture, electrical stimulation and surgery. Other treatments include psychotherapy, relaxation and meditation therapy, biofeedback, and behavior modification. NIH: National Institute of Neurological Disorders and Stroke

Painful Bladder Syndrome see Interstitial Cystitis

Interstitial cystitis (IC) is a condition that causes discomfort or pain in the bladder and a need to urinate frequently and urgently. It is far more common in women than in men. The symptoms vary from person to person. Some people may have pain without urgency or frequency. Others have urgency and frequency without pain. Women's symptoms often get worse during their periods. They may also have pain with sexual intercourse. The cause of IC isn't known. There is no one test to tell if you have it. Doctors often run tests to rule out other possible causes of symptoms. There is no cure for IC, but treatments can help most people feel better. They include Distending, or inflating, the bladder Bathing the inside of the bladder with a drug solution Oral medicines Electrical nerve stimulation Physical therapy Lifestyle changes Bladder training In rare cases, surgery NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Painkillers see Pain Relievers

Pain relievers are medicines that reduce or relieve headaches, sore muscles, arthritis, or other aches and pains. There are many different pain medicines, and each one has advantages and risks. Some types of pain respond better to certain medicines than others. Each person may also have a slightly different response to a pain reliever. Over-the-counter (OTC) medicines are good for many types of pain. There are two main types of OTC pain medicines: acetaminophen (Tylenol) and nonsteroidal anti-inflammatory drugs (NSAIDs). Aspirin, naproxen (Aleve), and ibuprofen (Advil, Motrin) are examples of OTC NSAIDs. If OTC medicines don't relieve your pain, your doctor may prescribe something stronger. Many NSAIDs are also available at higher prescription doses. The most powerful pain relievers are opioids. They are very effective, but they can sometimes have serious side effects. There is also a risk of addiction. Because of the risks, you must use them only under a doctor's supervision. There are many things you can do to help ease pain. Pain relievers are just one part of a pain treatment plan.

Palliative Care

Palliative care is treatment of the discomfort, symptoms, and stress of serious illness. It provides relief from distressing symptoms including Pain Shortness of breath Fatigue Constipation Nausea Loss of appetite Problems with sleep It can also help you deal with the side effects of the medical treatments you're receiving. Hospice care, care at the end of life, always includes palliative care. But you may receive palliative care at any stage of an illness. The goal is to make you comfortable and improve your quality of life. NIH: National Institute of Nursing Research

Pancreas Transplantation

The pancreas is a gland behind your stomach and in front of your spine. It produces the juices that help break down food and the hormones that help control blood sugar levels. A pancreas transplant is surgery to place a healthy pancreas from a donor into a person with a diseased pancreas. It is mostly done for people with severe type 1 diabetes. It can allow them to give up insulin shots. An experimental procedure called islet cell transplantation transplants only the parts of the pancreas that make insulin. People who have transplants must take drugs to keep their body from rejecting the new pancreas for the rest of their lives. They must also have regular follow-up care. Because of the risks, it is not a common treatment for type 1 diabetes.

Pancreatic Cancer

The pancreas is a gland behind your stomach and in front of your spine. It produces the juices that help break down food and the hormones that help control blood sugar levels. Pancreatic cancer usually begins in the cells that produce the juices. Some risk factors for developing pancreatic cancer include Smoking Long-term diabetes Chronic pancreatitis Certain hereditary disorders Pancreatic cancer is hard to catch early. It doesn't cause symptoms right away. When you do get symptoms, they are often vague or you may not notice them. They include yellowing of the skin and eyes, pain in the abdomen and back, weight loss and fatigue. Also, because the pancreas is hidden behind other organs, health care providers cannot see or feel the tumors during routine exams. Doctors use a physical exam, blood tests, imaging tests, and a biopsy to diagnose it. Because it is often found late and it spreads quickly, pancreatic cancer can be hard to treat. Possible treatments include surgery, radiation, chemotherapy, and targeted therapy. Targeted therapy uses substances that attack cancer cells without harming normal cells. NIH: National Cancer Institute

Pancreatic Diseases

The pancreas is a gland behind your stomach and in front of your spine. It produces juices that help break down food and hormones that help control blood sugar levels. Problems with the pancreas can lead to many health problems. These include Pancreatitis, or inflammation of the pancreas: This happens when digestive enzymes start digesting the pancreas itself Pancreatic cancer Cystic fibrosis, a genetic disorder in which thick, sticky mucus can also block tubes in your pancreas The pancreas also plays a role in diabetes. In type 1 diabetes, the beta cells of the pancreas no longer make insulin because the body's immune system has attacked them. In type 2 diabetes, the pancreas loses the ability to secrete enough insulin in response to meals.

Pancreatitis

The pancreas is a large gland behind the stomach and close to the first part of the small intestine. It secretes digestive juices into the small intestine through a tube called the pancreatic duct. The pancreas also releases the hormones insulin and glucagon into the bloodstream. Pancreatitis is inflammation of the pancreas. It happens when digestive enzymes start digesting the pancreas itself. Pancreatitis can be acute or chronic. Either form is serious and can lead to complications. Acute pancreatitis occurs suddenly and usually goes away in a few days with treatment. It is often caused by gallstones. Common symptoms are severe pain in the upper abdomen, nausea, and vomiting. Treatment is usually a few days in the hospital for intravenous (IV) fluids, antibiotics, and medicines to relieve pain. Chronic pancreatitis does not heal or improve. It gets worse over time and leads to permanent damage. The most common cause is heavy alcohol use. Other causes include cystic fibrosis and other inherited disorders, high levels of calcium or fats in the blood, some medicines, and autoimmune conditions. Symptoms include nausea, vomiting, weight loss, and oily stools. Treatment may also be a few days in the hospital for intravenous (IV) fluids, medicines to relieve pain, and nutritional support. After that, you may need to start taking enzymes and eat a special diet. It is also important to not smoke or drink alcohol. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Panic Disorder

Panic disorder is a type of anxiety disorder. It causes panic attacks, which are sudden feelings of terror when there is no real danger. You may feel as if you are losing control. You may also have physical symptoms, such as Fast heartbeat Chest or stomach pain Breathing difficulty Weakness or dizziness Sweating Feeling hot or a cold chill Tingly or numb hands Panic attacks can happen anytime, anywhere, and without warning. You may live in fear of another attack and may avoid places where you have had an attack. For some people, fear takes over their lives and they cannot leave their homes. Panic disorder is more common in women than men. It usually starts when people are young adults. Sometimes it starts when a person is under a lot of stress. Most people get better with treatment. Therapy can show you how to recognize and change your thinking patterns before they lead to panic. Medicines can also help. NIH: National Institute of Mental Health

Pantothenic Acid see B Vitamins

The B vitamins are B1 (thiamine) B2 (riboflavin) B3 (niacin) B5 (pantothenic acid) B6 B7 (biotin) B12 Folic acid These vitamins help the process your body uses to get or make energy from the food you eat. They also help form red blood cells. You can get B vitamins from proteins such as fish, poultry, meat, eggs, and dairy products. Leafy green vegetables, beans, and peas also have B vitamins. Many cereals and some breads have added B vitamins. Not getting enough of certain B vitamins can cause diseases. A lack of B12 or B6 can cause anemia.

Paralysis

Paralysis is the loss of muscle function in part of your body. It happens when something goes wrong with the way messages pass between your brain and muscles. Paralysis can be complete or partial. It can occur on one or both sides of your body. It can also occur in just one area, or it can be widespread. Paralysis of the lower half of your body, including both legs, is called paraplegia. Paralysis of the arms and legs is quadriplegia. Most paralysis is due to strokes or injuries such as spinal cord injury or a broken neck. Other causes of paralysis include Nerve diseases such as amyotrophic lateral sclerosis Autoimmune diseases such as Guillain-Barre syndrome Bell's palsy, which affects muscles in the face Polio used to be a cause of paralysis, but polio no longer occurs in the U.S.

Paralysis Agitans see Parkinson's Disease

Parkinson's disease (PD) is a type of movement disorder. It happens when nerve cells in the brain don't produce enough of a brain chemical called dopamine. Sometimes it is genetic, but most cases do not seem to run in families. Exposure to chemicals in the environment might play a role. Symptoms begin gradually, often on one side of the body. Later they affect both sides. They include Trembling of hands, arms, legs, jaw and face Stiffness of the arms, legs and trunk Slowness of movement Poor balance and coordination As symptoms get worse, people with the disease may have trouble walking, talking, or doing simple tasks. They may also have problems such as depression, sleep problems, or trouble chewing, swallowing, or speaking. There is no lab test for PD, so it can be difficult to diagnose. Doctors use a medical history and a neurological examination to diagnose it. PD usually begins around age 60, but it can start earlier. It is more common in men than in women. There is no cure for PD. A variety of medicines sometimes help symptoms dramatically. Surgery and deep brain stimulation (DBS) can help severe cases. With DBS, electrodes are surgically implanted in the brain. They send electrical pulses to stimulate the parts of the brain that control movement. NIH: National Institute of Neurological Disorders and Stroke

Paralysis, Infantile see Polio and Post-Polio Syndrome

Polio is an infectious disease caused by a virus. The virus lives in an infected person's throat and intestines. It is most often spread by contact with the stool of an infected person. You can also get it from droplets if an infected person sneezes or coughs. It can contaminate food and water if people do not wash their hands. Most people have no symptoms. If you have symptoms, they may include fever, fatigue, nausea, headache, flu-like symptoms, stiff neck and back, and pain in the limbs. A few people will become paralyzed. There is no treatment to reverse the paralysis of polio. Some people who've had polio develop post-polio syndrome (PPS) years later. Symptoms include tiredness, new muscle weakness, and muscle and joint pain. There is no way to prevent or cure PPS. The polio vaccine has wiped out polio in the United States and most other countries. Centers for Disease Control and Prevention

Paralytic Ileus see Intestinal Obstruction

An intestinal obstruction occurs when food or stool cannot move through the intestines. The obstruction can be complete or partial. There are many causes. The most common are adhesions, hernias, cancers, and certain medicines. Symptoms include Severe abdominal pain or cramping Vomiting Bloating Loud bowel sounds Swelling of the abdomen Inability to pass gas Constipation A complete intestinal obstruction is a medical emergency. It often requires surgery. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Paranasal Sinus Cancer see Nasal Cancer

Your paranasal sinuses are small hollow spaces around the nose. They are lined with cells that make mucus, which keeps your nose from drying out. The nasal cavity is the passageway just behind your nose. Air passes through it on the way to your throat as you breathe. Cancer of the nasal cavity and paranasal sinuses is rare. You are at greater risk if you are Male and over 40 years old Exposed to certain workplace chemicals Infected with HPV A smoker There may be no symptoms at first, and later symptoms can be like those of infections. Doctors diagnose nasal cancer with imaging tests, lighted tube-like instruments that look inside the nose, and biopsies. Treatment options include surgery, radiation, and chemotherapy. NIH: National Cancer Institute

Paraplegia see Paralysis

Paralysis is the loss of muscle function in part of your body. It happens when something goes wrong with the way messages pass between your brain and muscles. Paralysis can be complete or partial. It can occur on one or both sides of your body. It can also occur in just one area, or it can be widespread. Paralysis of the lower half of your body, including both legs, is called paraplegia. Paralysis of the arms and legs is quadriplegia. Most paralysis is due to strokes or injuries such as spinal cord injury or a broken neck. Other causes of paralysis include Nerve diseases such as amyotrophic lateral sclerosis Autoimmune diseases such as Guillain-Barre syndrome Bell's palsy, which affects muscles in the face Polio used to be a cause of paralysis, but polio no longer occurs in the U.S.

Parasitic Diseases

Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not. Parasites range in size from tiny, one-celled organisms called protozoa to worms that can be seen with the naked eye. Some parasitic diseases occur in the United States. Contaminated water supplies can lead to Giardia infections. Cats can transmit toxoplasmosis, which is dangerous for pregnant women. Others, like malaria, are common in other parts of the world. If you are traveling, it's important to drink only water you know is safe. Prevention is especially important. There are no vaccines for parasitic diseases. Some medicines are available to treat parasitic infections.

Parathyroid Disorders

Most people have four pea-sized glands, called parathyroid glands, on the thyroid gland in the neck. Though their names are similar, the thyroid and parathyroid glands are completely different. The parathyroid glands make parathyroid hormone (PTH), which helps your body keep the right balance of calcium and phosphorous. If your parathyroid glands make too much or too little hormone, it disrupts this balance. If they secrete extra PTH, you have hyperparathyroidism, and your blood calcium rises. In many cases, a benign tumor on a parathyroid gland makes it overactive. Or, the extra hormones can come from enlarged parathyroid glands. Very rarely, the cause is cancer. If you do not have enough PTH, you have hypoparathyroidism. Your blood will have too little calcium and too much phosphorous. Causes include injury to the glands, endocrine disorders, or genetic conditions. Treatment is aimed at restoring the balance of calcium and phosphorous. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Parenteral Nutrition see Nutritional Support

Nutritional support is therapy for people who cannot get enough nourishment by eating or drinking. You may need it if you Can't swallow Have problems with your appetite Are severely malnourished Can't absorb nutrients through your digestive system You receive nutritional support through a needle or catheter placed in your vein or with a feeding tube, which goes into your stomach.

Parenting

If you're a parent, you get plenty of suggestions on how to raise your child. From experts to other parents, people are always ready to offer advice. Parenting tips, parents' survival guides, dos, don'ts, shoulds and shouldn'ts - new ones come out daily. The truth is there is more than one "right" way to be a good parent. Good parenting includes Keeping your child safe Showing affection and listening to your child Providing order and consistency Setting and enforcing limits Spending time with your child Monitoring your child's friendships and activities Leading by example NIH: National Institute of Child Health and Human Development

Parkinson's Disease

Parkinson's disease (PD) is a type of movement disorder. It happens when nerve cells in the brain don't produce enough of a brain chemical called dopamine. Sometimes it is genetic, but most cases do not seem to run in families. Exposure to chemicals in the environment might play a role. Symptoms begin gradually, often on one side of the body. Later they affect both sides. They include Trembling of hands, arms, legs, jaw and face Stiffness of the arms, legs and trunk Slowness of movement Poor balance and coordination As symptoms get worse, people with the disease may have trouble walking, talking, or doing simple tasks. They may also have problems such as depression, sleep problems, or trouble chewing, swallowing, or speaking. There is no lab test for PD, so it can be difficult to diagnose. Doctors use a medical history and a neurological examination to diagnose it. PD usually begins around age 60, but it can start earlier. It is more common in men than in women. There is no cure for PD. A variety of medicines sometimes help symptoms dramatically. Surgery and deep brain stimulation (DBS) can help severe cases. With DBS, electrodes are surgically implanted in the brain. They send electrical pulses to stimulate the parts of the brain that control movement. NIH: National Institute of Neurological Disorders and Stroke

Paronychia see Nail Diseases

Your toenails and fingernails protect the tissues of your toes and fingers. They are made up of layers of a hardened protein called keratin, which is also in your hair and skin. The health of your nails can be a clue to your overall health. Healthy nails are usually smooth and consistent in color. Specific types of nail discoloration and changes in growth rate can be signs of lung, heart, kidney, and liver diseases, as well as diabetes and anemia. White spots and vertical ridges are harmless. Nail problems that sometimes require treatment include Bacterial and fungal infections Ingrown nails Tumors Warts Keeping your nails clean, dry, and trimmed can help you avoid some problems. Do not remove the cuticle, which can cause infection.

Parotid Gland Cancer see Salivary Gland Cancer

Your salivary glands make saliva - sometimes called spit - and empty it into your mouth through openings called ducts. Saliva makes your food moist, which helps you chew and swallow. It helps you digest your food. It also cleans your mouth and contains antibodies that can kill germs. Salivary gland cancer is a type of head and neck cancer. It is rare. It may not cause any symptoms, or you could notice A lump in your ear, cheek, jaw, lip, or inside the mouth Fluid draining from your ear Trouble swallowing or opening the mouth widely Numbness, weakness, or pain in your face Doctors diagnose salivary gland cancer using a physical exam, imaging tests, and a biopsy. Treatment can include surgery, radiation therapy, and/or chemotherapy. NIH: National Cancer Institute

Parotid Gland Disorders see Salivary Gland Disorders

Your salivary glands are in your mouth. You have three pairs of major salivary glands and hundreds of small (minor) glands. They make saliva (spit) and empty it into your mouth through openings called ducts. Saliva makes your food moist, which helps you chew and swallow. It helps you digest your food. It also cleans your mouth and contains antibodies that can kill germs. Problems with salivary glands can cause them to become irritated and swollen. You may have symptoms such as A bad taste in your mouth Difficulty opening your mouth Dry mouth Pain in your face or mouth Swelling of your face or neck Causes of salivary gland problems include infections, obstruction, or cancer. Problems can also be due to other disorders, such as mumps or Sjogren's syndrome.

Partner Abuse see Domestic Violence

Domestic violence is a type of abuse. It usually involves a spouse or partner, but it can also be a child, elderly relative, or other family member. Domestic violence may include Physical violence that can lead to injuries such as bruises or broken bones Sexual violence Threats of physical or sexual violence Emotional abuse that may lead to depression, anxiety, or social isolation Economic abuse, which involves controlling access to money Stalking, which causes fear for your own safety The first step in getting help is to tell someone you trust, such as a friend, family member, or co-worker. You can also contact your doctor or another health care professional, an emergency shelter, or a domestic violence helpline. The first step in getting help is to tell someone you trust. Centers for Disease Control and Prevention

Passive Smoking see Secondhand Smoke

Secondhand smoke is a mixture of the smoke that comes from the burning end of a cigarette, cigar, or pipe, and the smoke breathed out by the smoker. It contains more than 7,000 chemicals. Hundreds of those chemicals are toxic and about 70 can cause cancer. Health effects of secondhand smoke include Ear infections in children More frequent and severe asthma attacks in children Heart disease and lung cancer in adults who have never smoked There is no safe amount of secondhand smoke. Even low levels of it can be harmful. The only way to fully protect nonsmokers from secondhand smoke is not to allow smoking indoors. Centers for Disease Control and Prevention

Patella see Knee Injuries and Disorders

Your knee joint is made up of bone, cartilage, ligaments and fluid. Muscles and tendons help the knee joint move. When any of these structures is hurt or diseased, you have knee problems. Knee problems can cause pain and difficulty walking. Knee problems are very common, and they occur in people of all ages. Knee problems can interfere with many things, from participation in sports to simply getting up from a chair and walking. This can have a big impact on your life. The most common disease affecting the knee is osteoarthritis. The cartilage in the knee gradually wears away, causing pain and swelling. Injuries to ligaments and tendons also cause knee problems. A common injury is to the anterior cruciate ligament (ACL). You usually injure your ACL by a sudden twisting motion. ACL and other knee injuries are common sports injuries. Treatment of knee problems depends on the cause. In some cases your doctor may recommend knee replacement. NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Paternity Testing see Genetic Testing

Genetic tests are tests on blood and other tissue to find genetic disorders. Over 2000 tests are available. Doctors use genetic tests for several reasons. These include Finding genetic diseases in unborn babies Finding out if people carry a gene for a disease and might pass it on to their children Screening embryos for disease Testing for genetic diseases in adults before they cause symptoms Making a diagnosis in a person who has disease symptoms Figuring out the type or dose of a medicine that is best for a certain person People have many different reasons for being tested or not being tested. For some, it is important to know whether a disease can be prevented or treated if a test is positive. In some cases, there is no treatment. But test results might help a person make life decisions, such as family planning or insurance coverage. A genetic counselor can provide information about the pros and cons of testing. NIH: National Human Genome Research Institute

Pathological Gambling see Compulsive Gambling

Many people enjoy gambling, whether it's betting on a horse or playing poker on the Internet. Most people who gamble don't have a problem, but some lose control of their gambling. Signs of problem gambling include Always thinking about gambling Lying about gambling Spending work or family time gambling Feeling bad after you gamble, but not quitting Gambling with money you need for other things If you have concerns about your gambling, ask for help. Your health care provider can work with you to find the treatment that's best for you. NIH: National Institutes of Health

Patient Portals see Personal Health Records

You've probably seen your chart at your doctor's office. In fact, you may have charts at several doctors' offices. If you've been in the hospital, you have a chart there, too. These charts are your medical records. They may be on paper or electronic. To keep track of all this information, it's a good idea to keep your own personal health record. What kind of information would you put in a personal health record? You could start with Your name, birth date, blood type, and emergency contact information Date of last physical Dates and results of tests and screenings Major illnesses and surgeries, with dates A list of your medicines and supplements, the dosages, and how long you've taken them Any allergies Any chronic diseases Any history of illnesses in your family

Patient Records see Personal Health Records

You've probably seen your chart at your doctor's office. In fact, you may have charts at several doctors' offices. If you've been in the hospital, you have a chart there, too. These charts are your medical records. They may be on paper or electronic. To keep track of all this information, it's a good idea to keep your own personal health record. What kind of information would you put in a personal health record? You could start with Your name, birth date, blood type, and emergency contact information Date of last physical Dates and results of tests and screenings Major illnesses and surgeries, with dates A list of your medicines and supplements, the dosages, and how long you've taken them Any allergies Any chronic diseases Any history of illnesses in your family

Patient Rights

As a patient, you have certain rights. Some are guaranteed by federal law, such as the right to get a copy of your medical records, and the right to keep them private. Many states have additional laws protecting patients, and healthcare facilities often have a patient bill of rights. An important patient right is informed consent. This means that if you need a treatment, your health care provider must give you the information you need to make a decision. Many hospitals have patient advocates who can help you if you have problems. Many states have an ombudsman office for problems with long term care. Your state's department of health may also be able to help.

Patient Safety

You can help prevent medical errors by being an active member of your health care team. Research shows that patients who are more involved with their care tend to get better results. To reduce the risk of medical errors, you can Ask questions if you have doubts or concerns. Take a relative or friend to your doctor appointment to help you ask questions and understand answers. Make sure you understand what will happen if you need surgery Tell your health care providers about all the medicines you take, including over-the-counter drugs and dietary supplements. Tell them if you have any allergies or bad reactions to anesthesia. Make sure you know how to take your medications correctly. Get a second opinion about treatment options Keep a copy of your own health history Agency for Healthcare Research and Quality

PCOS see Polycystic Ovary Syndrome

Polycystic ovary syndrome (PCOS) happens when a woman's ovaries or adrenal glands produce more male hormones than normal. PCOS causes cysts (fluid-filled sacs) to grow on the ovaries. Symptoms include Irregular menstrual periods Infertility Pelvic pain Excess hair growth on the face, chest, stomach, or thighs Weight gain Acne or oily skin Patches of thickened skin Women with PCOS are at higher risk of diabetes, metabolic syndrome, heart disease, and high blood pressure. PCOS is more common in women who are obese, or have a mother or sister with PCOS. To diagnose PCOS, your health care provider may do a physical exam, pelvic exam, blood tests, and an ultrasound. There is no cure, but diet, exercise, and medicines can help control the symptoms. Birth control pills help women have normal periods, reduce male hormone levels, and clear acne. Treatments for infertility caused by PCOS may include medicines, surgery, and in vitro fertilization (IVF). NIH: National Institute of Child Health and Human Development

Peanut Allergy see Food Allergy

Food allergy is an abnormal response to a food triggered by your body's immune system. In adults, the foods that most often trigger allergic reactions include fish, shellfish, peanuts, and tree nuts, such as walnuts. Problem foods for children can include eggs, milk, peanuts, tree nuts, soy, and wheat. The allergic reaction may be mild. In rare cases it can cause a severe reaction called anaphylaxis. Symptoms of food allergy include Itching or swelling in your mouth Vomiting, diarrhea, or abdominal cramps and pain Hives or eczema Tightening of the throat and trouble breathing Drop in blood pressure Your health care provider may use a detailed history, elimination diet, and skin and blood tests to diagnose a food allergy. When you have food allergies, you must be prepared to treat an accidental exposure. Wear a medical alert bracelet or necklace, and carry an auto-injector device containing epinephrine (adrenaline). You can only prevent the symptoms of food allergy by avoiding the food. After you and your health care provider have identified the foods to which you are sensitive, you must remove them from your diet. NIH: National Institute of Allergy and Infectious Diseases

Pediatrics see Children's Health

Your child's health includes physical, mental and social well-being. Most parents know the basics of keeping children healthy, like offering them healthy foods, making sure they get enough sleep and exercise and insuring their safety. It is also important for children to get regular checkups with their health care provider. These visits are a chance to check your child's development. They are also a good time to catch or prevent problems. Other than checkups, school-age children should be seen for Significant weight gain or loss Sleep problems or change in behavior Fever higher than 102 Rashes or skin infections Frequent sore throats Breathing problems

Pee see Urine and Urination

Your kidneys make urine by filtering wastes and extra water from your blood. The waste is called urea. Your blood carries it to the kidneys. From the kidneys, urine travels down two thin tubes called ureters to the bladder. The bladder stores urine until you are ready to urinate. It swells into a round shape when it is full and gets smaller when empty. If your urinary system is healthy, your bladder can hold up to 16 ounces (2 cups) of urine comfortably for 2 to 5 hours. You may have problems with urination if you have Kidney failure Urinary tract infections An enlarged prostate Bladder control problems like incontinence, overactive bladder, or interstitial cystitis A blockage that prevents you from emptying your bladder Some conditions may also cause you to have blood or protein in your urine. If you have a urinary problem, see your healthcare provider. Urinalysis and other urine tests can help to diagnose the problem. Treatment depends on the cause. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Pelvic Exam see Women's Health Checkup

Regular health exams and tests can help find problems before they start. They also can help find problems early, when your chances for treatment are better. As a woman, you need some special exams and screenings. During your checkup, your health care provider will usually do: A pelvic exam - an exam to check if internal female organs are normal by feeling their shape and size. A Pap test - a test to check for cancer of the cervix, the opening to a woman's uterus. Cells from the cervix are examined under a microscope. A clinical breast exam - to check for breast cancer by feeling and looking at your breasts. Your health care provider may also recommend other tests, including a mammogram or a test for HPV.

Pelvic Inflammatory Disease

Pelvic inflammatory disease (PID) is an infection and inflammation of the uterus, ovaries, and other female reproductive organs. It causes scarring in these organs. This can lead to infertility, ectopic pregnancy, pelvic pain, abscesses, and other serious problems. PID is the most common preventable cause of infertility in the United States. Gonorrhea and chlamydia, two sexually transmitted diseases, are the most common causes of PID. Other bacteria can also cause it. You are at greater risk if you Are sexually active and younger than 25 Have more than one sex partner Douche Some women have no symptoms. Others have pain in the lower abdomen, fever, smelly vaginal discharge, irregular bleeding, and pain during intercourse or urination. Doctors diagnose PID with a physical exam, lab tests, and imaging tests. Antibiotics can cure PID. Early treatment is important. Waiting too long increases the risk of infertility. NIH: National Institute of Allergy and Infectious Diseases

Pelvic Pain

Pelvic pain occurs mostly in the lower abdomen area. The pain might be steady, or it might come and go. If the pain is severe, it might get in the way of your daily activities. If you're a woman, you might feel a dull pain during your period. It could also happen during sex. Pelvic pain can be a sign that there is a problem with one of the organs in your pelvic area, such as the uterus, ovaries, fallopian tubes, cervix or vagina. It could also be a symptom of infection, or a problem with the urinary tract, lower intestines, rectum, muscle or bone. If you're a man, the cause is often a problem with the prostate. You might have to undergo a lot of medical tests to find the cause of the pain. The treatment will depend on the cause, how bad the pain is and how often it occurs. NIH: National Institute of Child Health and Human Development

Pelvic Support Problems

The pelvic floor is a group of muscles and other tissues that form a sling or hammock across the pelvis. In women, it holds the uterus, bladder, bowel, and other pelvic organs in place so that they can work properly. The pelvic floor can become weak or be injured. The main causes are pregnancy and childbirth. Other causes include being overweight, radiation treatment, surgery, and getting older. Common symptoms include Feeling heaviness, fullness, pulling, or aching in the vagina. It gets worse by the end of the day or during a bowel movement. Seeing or feeling a "bulge" or "something coming out" of the vagina Having a hard time starting to urinate or emptying the bladder completely Having frequent urinary tract infections Leaking urine when you cough, laugh, or exercise Feeling an urgent or frequent need to urinate Feeling pain while urinating Leaking stool or having a hard time controlling gas Being constipated Having a hard time making it to the bathroom in time Your health care provider diagnoses the problem with a physical exam, a pelvic exam, or special tests. Treatments include special pelvic muscle exercises called Kegel exercises. A mechanical support device called a pessary helps some women. Surgery and medicines are other treatments. NIH: National Institute of Child Health and Human Development

Pelvis see Hip Injuries and Disorders

Your hip is the joint where your thigh bone meets your pelvis bone. Hips are called ball-and-socket joints because the ball-like top of your thigh bone moves within a cup-like space in your pelvis. Your hips are very stable. When they are healthy, it takes great force to hurt them. However, playing sports, running, overuse or falling can all sometimes lead to hip injuries. These include Strains Bursitis Dislocations Fractures Certain diseases also lead to hip injuries or problems. Osteoarthritis can cause pain and limited motion. Osteoporosis of the hip causes weak bones that break easily. Both of these are common in older people. Treatment for hip disorders may include rest, medicines, physical therapy, or surgery, including hip replacement.

Pemphigoid see Pemphigus

Pemphigus is an autoimmune disorder. If you have it, your immune system attacks healthy cells in your skin and mouth, causing blisters and sores. No one knows the cause. Pemphigus does not spread from person to person. It does not appear to be inherited. But some people's genes put them more at risk for pemphigus. Pemphigoid is also an autoimmune skin disease. It leads to deep blisters that do not break easily. Pemphigoid is most common in older adults and may be fatal for older, sick patients. Doctors diagnose pemphigus with a physical exam, a biopsy, and blood tests. The treatment of pemphigus and pemphigoid is the same: one or more medicines to control symptoms. These may include Steroids, which reduce inflammation Drugs that suppress the immune system response Antibiotics to treat associated infections NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Pemphigus

Pemphigus is an autoimmune disorder. If you have it, your immune system attacks healthy cells in your skin and mouth, causing blisters and sores. No one knows the cause. Pemphigus does not spread from person to person. It does not appear to be inherited. But some people's genes put them more at risk for pemphigus. Pemphigoid is also an autoimmune skin disease. It leads to deep blisters that do not break easily. Pemphigoid is most common in older adults and may be fatal for older, sick patients. Doctors diagnose pemphigus with a physical exam, a biopsy, and blood tests. The treatment of pemphigus and pemphigoid is the same: one or more medicines to control symptoms. These may include Steroids, which reduce inflammation Drugs that suppress the immune system response Antibiotics to treat associated infections NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Penile Disorders see Penis Disorders

Problems with the penis can cause pain and affect a man's sexual function and fertility. Penis disorders include Erectile dysfunction - inability to get or keep an erection Priapism - a painful erection that does not go away Peyronie's disease - bending of the penis during an erection due to a hard lump called a plaque Balanitis - inflammation of the skin covering the head of the penis, most often in men and boys who have not been circumcised Penile cancer - a rare form of cancer, highly curable when caught early

Penis Disorders

Problems with the penis can cause pain and affect a man's sexual function and fertility. Penis disorders include Erectile dysfunction - inability to get or keep an erection Priapism - a painful erection that does not go away Peyronie's disease - bending of the penis during an erection due to a hard lump called a plaque Balanitis - inflammation of the skin covering the head of the penis, most often in men and boys who have not been circumcised Penile cancer - a rare form of cancer, highly curable when caught early

Peptic Ulcer

A peptic ulcer is a sore in the lining of your stomach or your duodenum, the first part of your small intestine. A burning stomach pain is the most common symptom. The pain Starts between meals or during the night Briefly stops if you eat or take antacids Lasts for minutes to hours Comes and goes for several days or weeks Peptic ulcers happen when the acids that help you digest food damage the walls of the stomach or duodenum. The most common cause is infection with a bacterium called Helicobacter pylori. Another cause is the long-term use of nonsteroidal anti-inflammatory medicines (NSAIDs) such as aspirin and ibuprofen. Stress and spicy foods do not cause ulcers, but can make them worse. To see if you have an H. pylori infection, your doctor will test your blood, breath, or stool. Your doctor also may look inside your stomach and duodenum by doing an endoscopy or x-ray. Peptic ulcers will get worse if not treated. Treatment may include medicines to reduce stomach acids or antibiotics to kill H. pylori. Antacids and milk can't heal peptic ulcers. Not smoking and avoiding alcohol can help. You may need surgery if your ulcers don't heal. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Performance-Enhancing Drugs see Anabolic Steroids; Sports Fitness

Anabolic steroids are man-made substances related to male sex hormones. Doctors use anabolic steroids to treat some hormone problems in men, delayed puberty, and muscle loss from some diseases. Bodybuilders and athletes often use anabolic steroids to build muscles and improve athletic performance. Using them this way is not legal or safe. Abuse of anabolic steroids has been linked with many health problems. They include Acne Breast growth and shrinking of testicles in men Voice deepening and growth of facial hair in women High blood pressure Heart problems, including heart attack Liver disease, including cancer Kidney damage Aggressive behavior NIH: National Institute on Drug Abuse

Pericardial Disorders

The pericardium is a membrane, or sac, that surrounds your heart. It holds the heart in place and helps it work properly. Problems with the pericardium include Pericarditis - an inflammation of the sac. It can be from a virus or other infection, a heart attack, heart surgery, other medical conditions, injuries, and certain medicines. Pericardial effusion - the buildup of fluid in the sac Cardiac tamponade - a serious problem in which buildup of fluid in the sac causes problems with the function of the heart Symptoms of pericardial problems include chest pain, rapid heartbeat, and difficulty breathing. Fever is a common symptom of acute pericarditis. Your doctor may use a physical exam, imaging tests, and heart tests to make a diagnosis. Treatment depends on the cause. NIH: National Heart, Lung, and Blood Institute

Pericardial Effusion see Pericardial Disorders

The pericardium is a membrane, or sac, that surrounds your heart. It holds the heart in place and helps it work properly. Problems with the pericardium include Pericarditis - an inflammation of the sac. It can be from a virus or other infection, a heart attack, heart surgery, other medical conditions, injuries, and certain medicines. Pericardial effusion - the buildup of fluid in the sac Cardiac tamponade - a serious problem in which buildup of fluid in the sac causes problems with the function of the heart Symptoms of pericardial problems include chest pain, rapid heartbeat, and difficulty breathing. Fever is a common symptom of acute pericarditis. Your doctor may use a physical exam, imaging tests, and heart tests to make a diagnosis. Treatment depends on the cause. NIH: National Heart, Lung, and Blood Institute

Pericarditis see Pericardial Disorders

The pericardium is a membrane, or sac, that surrounds your heart. It holds the heart in place and helps it work properly. Problems with the pericardium include Pericarditis - an inflammation of the sac. It can be from a virus or other infection, a heart attack, heart surgery, other medical conditions, injuries, and certain medicines. Pericardial effusion - the buildup of fluid in the sac Cardiac tamponade - a serious problem in which buildup of fluid in the sac causes problems with the function of the heart Symptoms of pericardial problems include chest pain, rapid heartbeat, and difficulty breathing. Fever is a common symptom of acute pericarditis. Your doctor may use a physical exam, imaging tests, and heart tests to make a diagnosis. Treatment depends on the cause. NIH: National Heart, Lung, and Blood Institute

Perimenopause see Menopause

Menopause is the time in a woman's life when her period stops. It usually occurs naturally, most often after age 45. Menopause happens because the woman's ovaries stop producing the hormones estrogen and progesterone. A woman has reached menopause when she has not had a period for one year. Changes and symptoms can start several years earlier. They include A change in periods - shorter or longer, lighter or heavier, with more or less time in between Hot flashes and/or night sweats Trouble sleeping Vaginal dryness Mood swings Trouble focusing Less hair on head, more on face Some symptoms require treatment. Talk to your doctor about how to best manage menopause. Make sure the doctor knows your medical history and your family medical history. This includes whether you are at risk for heart disease, osteoporosis, or breast cancer. Dept. of Health and Human Services Office on Women's Health

Period Pain

What are painful periods? Menstruation, or period, is normal vaginal bleeding that happens as part of a woman's monthly cycle. Many women have painful periods, also called dysmenorrhea. The pain is most often menstrual cramps, which are a throbbing, cramping pain in your lower abdomen. You may also have other symptoms, such as lower back pain, nausea, diarrhea, and headaches. Period pain is not the same as premenstrual syndrome (PMS). PMS causes many different symptoms, including weight gain, bloating, irritability, and fatigue. PMS often starts one to two weeks before your period starts. What causes painful periods? There are two types of dysmenorrhea: primary and secondary. Each type has different causes. Primary dysmenorrhea is the most common kind of period pain. It is period pain that is not caused by another condition. The cause is usually having too many prostaglandins, which are chemicals that your uterus makes. These chemicals make the muscles of your uterus tighten and relax, and this causes the cramps. The pain can start a day or two before your period. It normally lasts for a few days, though in some women it can last longer. You usually first start having period pain when you are younger, just after you begin getting periods. Often, as you get older, you have less pain. The pain may also get better after you have given birth. Secondary dysmenorrhea often starts later in life. It is caused by conditions that affect your uterus or other reproductive organs, such as endometriosis and uterine fibroids. This kind of pain often gets worse over time. It may begin before your period starts, and continue after your period ends. What can I do about period pain? To help ease your period pain, you can try Using a heating pad or hot water bottle on your lower abdomen Getting some exercise Taking a hot bath Doing relaxation techniques, including yoga and meditation You might also try taking over-the-counter pain relievers such as nonsteroidal anti-inflammatory drugs (NSAIDs). NSAIDs include ibuprofen and naproxen. Besides relieving pain, NSAIDs reduce the amount of prostaglandins that your uterus makes, and lessen their effects. This helps to lessen the cramps. You can take NSAIDs when you first have symptoms, or when your period starts. You can keep taking them for a few days. You should not take NSAIDS if you have ulcers or other stomach problems, bleeding problems, or liver disease. You should also not take them if you are allergic to aspirin. Always check with your health care provider if you are not sure whether or not you should take NSAIDs. It may also help to get enough rest and avoid using alcohol and tobacco. When should I get medical help for my period pain? For many women, some pain during your period is normal. However, you should contact your health care provider if NSAIDs and self-care measures don't help, and the pain interferes with your life Your cramps suddenly get worse You are over 25 and you get severe cramps for the first time You have a fever with your period pain You have the pain even when you are not getting your period How is the cause of severe period pain diagnosed? To diagnose severe period pain, your health care provider will ask you about your medical history and do a pelvic exam. You may also have an ultrasound or other imaging test. If your health care provider thinks you have secondary dysmenorrhea, you might have laparoscopy. It is a surgery that that lets your health care provider look inside your body. What are treatments for severe period pain? If your period pain is primary dysmenorrhea and you need medical treatment, your health care provider might suggest using hormonal birth control, such as the pill, patch, ring, or IUD. Another treatment option might be prescription pain relievers. If you have secondary dysmenorrhea, your treatment depends upon the condition that is causing the problem. In some cases, you may need surgery.

Periodontal Disease see Gum Disease

If you have gum disease, you're not alone. Many U.S. adults currently have some form of the disease. It ranges from simple gum inflammation, called gingivitis, to serious damage to the tissue and bone supporting the teeth. In the worst cases, you can lose teeth. In gingivitis, the gums become red and swollen. They can bleed easily. Gingivitis is a mild form of gum disease. You can usually reverse it with daily brushing and flossing and regular cleanings by a dentist or dental hygienist. Untreated gingivitis can lead to periodontitis. If you have periodontitis, the gums pull away from the teeth and form pockets that become infected. If not treated, the bones, gums and connective tissue that support the teeth are destroyed. NIH: National Institute of Dental and Craniofacial Research

Peripheral Arterial Disease

Peripheral arterial disease (PAD) happens when there is a narrowing of the blood vessels outside of your heart. The cause of PAD is atherosclerosis. This happens when plaque builds up on the walls of the arteries that supply blood to the arms and legs. Plaque is a substance made up of fat and cholesterol. It causes the arteries to narrow or become blocked. This can reduce or stop blood flow, usually to the legs. If severe enough, blocked blood flow can cause tissue death and can sometimes lead to amputation of the foot or leg. The main risk factor for PAD is smoking. Other risk factors include older age and diseases like diabetes, high blood cholesterol, high blood pressure, heart disease, and stroke. Many people who have PAD don't have any symptoms. If you have symptoms, they may include Pain, numbness, achiness, or heaviness in the leg muscles. This happens when walking or climbing stairs. Weak or absent pulses in the legs or feet Sores or wounds on the toes, feet, or legs that heal slowly, poorly, or not at all A pale or bluish color to the skin A lower temperature in one leg than the other leg Poor nail growth on the toes and decreased hair growth on the legs Erectile dysfunction, especially among men who have diabetes PAD can increase your risk of heart attack, stroke, and transient ischemic attack. Doctors diagnose PAD with a physical exam and heart and imaging tests. Treatments include lifestyle changes, medicines, and sometimes surgery. Lifestyle changes include dietary changes, exercise, and efforts to lower high cholesterol levels and high blood pressure. NIH: National Heart, Lung, and Blood Institute

Peripheral Nerve Disorders

Your peripheral nerves are the ones outside your brain and spinal cord. Like static on a telephone line, peripheral nerve disorders distort or interrupt the messages between the brain and the rest of the body. There are more than 100 kinds of peripheral nerve disorders. They can affect one nerve or many nerves. Some are the result of other diseases, like diabetic nerve problems. Others, like Guillain-Barre syndrome, happen after a virus infection. Still others are from nerve compression, like carpal tunnel syndrome or thoracic outlet syndrome. In some cases, like complex regional pain syndrome and brachial plexus injuries, the problem begins after an injury. Some people are born with peripheral nerve disorders. Symptoms often start gradually, and then get worse. They include Numbness Pain Burning or tingling Muscle weakness Sensitivity to touch Treatment aims to treat any underlying problem, reduce pain and control symptoms. NIH: National Institute of Neurological Disorders and Stroke

Peritoneal Dialysis see Dialysis

When your kidneys are healthy, they clean your blood. They also make hormones that keep your bones strong and your blood healthy. When your kidneys fail, you need treatment to replace the work your kidneys used to do. Unless you have a kidney transplant, you will need a treatment called dialysis. There are two main types of dialysis. Both types filter your blood to rid your body of harmful wastes, extra salt, and water. Hemodialysis uses a machine. It is sometimes called an artificial kidney. You usually go to a special clinic for treatments several times a week. Peritoneal dialysis uses the lining of your abdomen, called the peritoneal membrane, to filter your blood. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Peritoneal Disorders

Your peritoneum is the tissue that lines your abdominal wall and covers most of the organs in your abdomen. A liquid, peritoneal fluid, lubricates the surface of this tissue. Disorders of the peritoneum are not common. They include Peritonitis - an inflammation of the peritoneum Cancer Complications from peritoneal dialysis Your doctor may use imaging tests or lab tests to analyze the peritoneal fluid to diagnose the problem. Treatment of peritoneal disorders depends on the cause.

Peritonitis see Peritoneal Disorders

Your peritoneum is the tissue that lines your abdominal wall and covers most of the organs in your abdomen. A liquid, peritoneal fluid, lubricates the surface of this tissue. Disorders of the peritoneum are not common. They include Peritonitis - an inflammation of the peritoneum Cancer Complications from peritoneal dialysis Your doctor may use imaging tests or lab tests to analyze the peritoneal fluid to diagnose the problem. Treatment of peritoneal disorders depends on the cause.

Persian Gulf War see Veterans and Military Health

Military service members and veterans have made sacrifices to our country, and they face different health issues than civilians. During their service, they are at risk for various injuries. These injuries can happen during combat, while others involve physical stress to the body. Sometimes the injuries are life-threatening or serious enough to cause disability. Others may not be as serious, but can be painful and affect daily life. Specific types of injuries include Shrapnel and gunshot wounds Lost limbs Head and brain injuries Tinnitus and hearing loss, typically from exposure to noise Sprains and strains Limited range of motion, especially in ankles and knees There may also be a risk of health problems from exposure to environmental hazards, such as contaminated water, chemicals, infections, and burn pits. Being in combat and being separated from your family can be stressful. The stress can put service members and veterans at risk for mental health problems. These include anxiety, post-traumatic stress disorder, depression and substance abuse. Suicide can also be a concern.

Persistent Vegetative State see Coma

A coma is a deep state of unconsciousness. An individual in a coma is alive but unable to move or respond to his or her environment. Coma may occur as a complication of an underlying illness, or as a result of injuries, such as brain injury. A coma rarely lasts more than 2 to 4 weeks. The outcome for coma depends on the cause, severity, and site of the damage. People may come out of a coma with physical, intellectual, and psychological problems. Some people may remain in a coma for years or even decades. For those people, the most common cause of death is infection, such as pneumonia. NIH: National Institute of Neurological Disorders and Stroke

Personal Health Records

You've probably seen your chart at your doctor's office. In fact, you may have charts at several doctors' offices. If you've been in the hospital, you have a chart there, too. These charts are your medical records. They may be on paper or electronic. To keep track of all this information, it's a good idea to keep your own personal health record. What kind of information would you put in a personal health record? You could start with Your name, birth date, blood type, and emergency contact information Date of last physical Dates and results of tests and screenings Major illnesses and surgeries, with dates A list of your medicines and supplements, the dosages, and how long you've taken them Any allergies Any chronic diseases Any history of illnesses in your family

Personality Disorders

Personality disorders are a group of mental illnesses. They involve long-term patterns of thoughts and behaviors that are unhealthy and inflexible. The behaviors cause serious problems with relationships and work. People with personality disorders have trouble dealing with everyday stresses and problems. They often have stormy relationships with other people. The cause of personality disorders is unknown. However, genes and childhood experiences may play a role. The symptoms of each personality disorder are different. They can mild or severe. People with personality disorders may have trouble realizing that they have a problem. To them, their thoughts are normal, and they often blame others for their problems. They may try to get help because of their problems with relationships and work. Treatment usually includes talk therapy and sometimes medicine.

Perspiration see Sweat

Sweat is a clear, salty liquid produced by glands in your skin. Sweating is how your body cools itself. You sweat mainly under your arms and on your feet and palms. When sweat mixes with bacteria on your skin, it can cause a smell. Bathing regularly and using antiperspirants or deodorants can help control the odor. Sweating a lot is normal when it is hot or when you exercise, are anxious, or have a fever. It also happens during menopause. If you often sweat too much, it's called hyperhidrosis. Causes include thyroid or nervous system disorders, low blood sugar, or another health problem. Sweating too little, anhidrosis, can be life-threatening because your body can overheat. Causes of anhidrosis include dehydration, burns, and some skin and nerve disorders.

Pertussis see Whooping Cough

Whooping cough is an infectious bacterial disease that causes uncontrollable coughing. The name comes from the noise you make when you take a breath after you cough. You may have choking spells or may cough so hard that you vomit. Anyone can get whooping cough, but it is more common in infants and children. It's especially dangerous for infants. The coughing spells can be so bad that it is hard for infants to eat, drink, or breathe. To make a diagnosis, your doctor may do a physical exam, blood tests, chest x-rays, or nose or throat cultures. Before there was a vaccine, whooping cough was one of the most common childhood diseases and a major cause of childhood deaths in the U.S. Now most cases are prevented by vaccines. If you have whooping cough, treatment with antibiotics may help if given early. Centers for Disease Control and Prevention

Pervasive Developmental Disorder see Autism Spectrum Disorder

Autism spectrum disorder (ASD) is a neurological and developmental disorder that begins early in childhood and lasts throughout a person's life. It affects how a person acts and interacts with others, communicates, and learns. It includes what used to be known as Asperger syndrome and pervasive developmental disorders. It is called a "spectrum" disorder because people with ASD can have a range of symptoms. People with ASD might have problems talking with you, or they might not look you in the eye when you talk to them. They may also have restricted interests and repetitive behaviors. They may spend a lot of time putting things in order, or they may say the same sentence again and again. They may often seem to be in their "own world." At well-child checkups, the health care provider should check your child's development. If there are signs of ASD, your child will have a comprehensive evaluation. It may include a team of specialists, doing various tests and evaluations to make a diagnosis. The causes of ASD are not known. Research suggests that both genes and environment play important roles. There is currently no one standard treatment for ASD. There are many ways to increase your child's ability to grow and learn new skills. Starting them early can lead to better results. Treatments include behavior and communication therapies, skills training, and medicines to control symptoms. NIH: National Institute of Child Health and Human Development

Pesticides

Pests live where they are not wanted or cause harm to crops, people, or animals. Pesticides can help get rid of them. Pesticides are not just insect killers. They also include chemicals to control weeds, rodents, mildew, germs, and more. Many household products contain pesticides. Pesticides can protect your health by killing germs, animals, or plants that could hurt you. However, they can also be harmful to people or pets. You might want to try non-chemical methods first. If you do need a pesticide, use it correctly. Be especially careful around children and pets. Proper disposal of pesticides is also important - it can help protect the environment. Biologically-based pesticides are becoming more popular. They often are safer than traditional pesticides. Environmental Protection Agency

Pet Health

Pets can add fun, companionship and a feeling of safety to your life. Before getting a pet, think carefully about which animal is best for your family. What is each family member looking for in a pet? Who will take care of it? Does anyone have pet allergies? What type of animal suits your lifestyle and budget? Once you own a pet, keep it healthy. Know the signs of medical problems. Take your pet to the veterinarian if you notice: Loss of appetite Drinking a lot of water Gaining or losing a lot of weight quickly Strange behavior Being sluggish and tired Trouble getting up or down Strange lumps

PET Scans see Nuclear Scans

Nuclear scans use radioactive substances to see structures and functions inside your body. They use a special camera that detects radioactivity. Before the test, you receive a small amount of radioactive material. You may get it as an injection. Sometimes you swallow it or inhale it. Then you lie still on a table while the camera makes images. Most scans take 20 to 45 minutes. Nuclear scans can help doctors diagnose many conditions, including cancers, injuries, and infections. They can also show how organs like your heart and lungs are working.

Pets see Pet Health

Pets can add fun, companionship and a feeling of safety to your life. Before getting a pet, think carefully about which animal is best for your family. What is each family member looking for in a pet? Who will take care of it? Does anyone have pet allergies? What type of animal suits your lifestyle and budget? Once you own a pet, keep it healthy. Know the signs of medical problems. Take your pet to the veterinarian if you notice: Loss of appetite Drinking a lot of water Gaining or losing a lot of weight quickly Strange behavior Being sluggish and tired Trouble getting up or down Strange lumps

Peyronie's Disease see Penis Disorders

Problems with the penis can cause pain and affect a man's sexual function and fertility. Penis disorders include Erectile dysfunction - inability to get or keep an erection Priapism - a painful erection that does not go away Peyronie's disease - bending of the penis during an erection due to a hard lump called a plaque Balanitis - inflammation of the skin covering the head of the penis, most often in men and boys who have not been circumcised Penile cancer - a rare form of cancer, highly curable when caught early

Pfiesteria Infections see Water Pollution

We all need clean water. People need it to grow crops and to operate factories, and for drinking and recreation. Fish and wildlife depend on it to survive. Many different pollutants can harm our rivers, streams, lakes, and oceans. The three most common are soil, nutrients, and bacteria. Rain washes soil into streams and rivers. The soil can kill tiny animals and fish eggs. It can clog the gills of fish and block light, causing plants to die. Nutrients, often from fertilizers, cause problems in lakes, ponds, and reservoirs. Nitrogen and phosphorus make algae grow and can turn water green. Bacteria, often from sewage spills, can pollute fresh or salt water. You can help protect your water supply: Don't pour household products such as cleansers, beauty products, medicines, auto fluids, paint, and lawn care products down the drain. Take them to a hazardous waste collection site. Throw away excess household grease (meat fats, lard, cooking oil, shortening, butter, margarine, etc.) diapers, condoms, and personal hygiene products in the garbage can. Clean up after your pets. Pet waste contains nutrients and germs. Environmental Protection Agency

Phantom Limb see Limb Loss

People can lose all or part of an arm or leg for a number of reasons. Common ones include Problems with blood circulation. These may be the result of atherosclerosis or diabetes. Severe cases may result in amputation. Injuries, including from traffic accidents and military combat Cancer Birth defects Some amputees have phantom pain, which is the feeling of pain in the missing limb. Other physical problems include surgical complications and skin problems, if you wear an artificial limb. Many amputees use an artificial limb. Learning how to use it takes time. Physical therapy can help you adapt. Recovery from the loss of a limb can be hard. Sadness, anger, and frustration are common. If you are having a tough time, talk to your doctor. Treatment with medicine or counseling can help.

Pharyngeal Cancer see Throat Cancer

Throat cancer is a type of head and neck cancer. Throat cancer has different names, depending on which part of the throat is affected. The different parts of your throat are called the oropharynx, the hypopharynx, the nasopharynx, and the larynx, or voice box. The main risk factors for throat cancer are using tobacco heavy drinking. Certain types of throat cancer also have other risk factors. For example, having HPV is a risk factor for oropharyngeal cancer. Symptoms of throat cancer may include A sore throat that does not go away A lump in the neck Pain or ringing in the ears Trouble swallowing Ear pain To diagnose throat cancers, doctors may do a physical exam and history, imaging tests, and a biopsy. You may also need other tests, depending on the type of cancer. Treatments include surgery, radiation therapy, and chemotherapy. Treatment for some types of throat cancer may also include targeted therapy. Targeted therapy uses substances that attack cancer cells without harming normal cells. NIH: National Cancer Institute

Pharyngitis see Sore Throat

Your throat is a tube that carries food to your esophagus and air to your windpipe and larynx (also called the voice box). The technical name for the throat is pharynx. You can have a sore throat for many reasons. Often, colds and flu cause sore throats. Other causes can include: Allergies Mononucleosis Smoking Strep throat Tonsillitis Treatment depends on the cause. Sucking on lozenges, drinking lots of liquids, and gargling may ease the pain. Over-the-counter pain relievers can also help, but children should not take aspirin.

Pharynx Disorders see Throat Disorders

Your throat is a tube that carries food to your esophagus and air to your windpipe and larynx. The technical name for your throat is the pharynx. Throat problems are common. You've probably had a sore throat. The cause is usually a viral infection, but other causes include allergies, infection with strep bacteria or the leaking of stomach acids back up into the esophagus, called GERD. Other problems that affect the throat include Tonsillitis - inflammation of the tonsils Cancer Croup - inflammation, usually in small children, which causes a barking cough Laryngitis - swelling of the voice box, which can cause a hoarse voice or loss of voice Most throat problems are minor and go away on their own. Treatments, when needed, depend on the problem.

Phenylketonuria

Phenylketonuria (PKU) is a type of amino acid metabolism disorder. It is inherited. If you have it, your body can't process part of a protein called phenylalanine (Phe). Phe is in almost all foods. If your Phe level gets too high, it can damage your brain and cause severe intellectual disability. All babies born in U.S. hospitals must now have a screening test for PKU. This makes it easier to diagnose and treat the problem early. The best treatment for PKU is a diet of low-protein foods. There are special formulas for newborns. For older children and adults, the diet includes many fruits and vegetables. It also includes some low-protein breads, pastas and cereals. Nutritional formulas provide the vitamins and minerals you can't get from their food. Babies who get on this special diet soon after they are born develop normally. Many have no symptoms of PKU. It is important to stay on the diet for the rest of your life. NIH: National Institute of Child Health and Human Development

Pheochromocytoma

Pheochromocytoma is a rare tumor that usually starts in the cells of one of your adrenal glands. Although they are usually benign, pheochromocytomas often cause the adrenal gland to make too many hormones. This can lead to high blood pressure and cause symptoms such as Headaches Sweating Pounding of the heart Being shaky Being extremely pale Sometimes pheochromocytoma is part of another condition called multiple endocrine neoplasia syndrome (MEN). People with MEN often have other cancers and other problems involving hormones. Doctors use lab tests and imaging tests to diagnose it. Surgery is the most common treatment. Other options include radiation therapy, chemotherapy, and targeted therapy. Targeted therapy uses substances that attack cancer cells without harming normal cells. NIH: National Cancer Institute

Phobias

A phobia is a type of anxiety disorder. It is a strong, irrational fear of something that poses little or no real danger. There are many specific phobias. Acrophobia is a fear of heights. Agoraphobia is a fear of public places, and claustrophobia is a fear of closed-in places. If you become anxious and extremely self-conscious in everyday social situations, you could have a social phobia. Other common phobias involve tunnels, highway driving, water, flying, animals and blood. People with phobias try to avoid what they are afraid of. If they cannot, they may experience Panic and fear Rapid heartbeat Shortness of breath Trembling A strong desire to get away Phobias usually start in children or teens, and continue into adulthood. The causes of specific phobias are not known, but they sometimes run in families. Treatment helps most people with phobias. Options include medicines, therapy or both. NIH: National Institute of Mental Health

Phosphorus see Minerals

Minerals are important for your body to stay healthy. Your body uses minerals for many different jobs, including keeping your bones, muscles, heart, and brain working properly. Minerals are also important for making enzymes and hormones. There are two kinds of minerals: macrominerals and trace minerals. You need larger amounts of macrominerals. They include calcium, phosphorus, magnesium, sodium, potassium, chloride and sulfur. You only need small amounts of trace minerals. They include iron, manganese, copper, iodine, zinc, cobalt, fluoride and selenium. Most people get the amount of minerals they need by eating a wide variety of foods. In some cases, your doctor may recommend a mineral supplement. People who have certain health problems or take some medicines may need to get less of one of the minerals. For example, people with chronic kidney disease need to limit foods that are high in potassium.

Physical Fitness see Exercise and Physical Fitness

Regular physical activity is one of the most important things you can do for your health. It can help Control your weight Lower your risk of heart disease Lower your risk for type 2 diabetes and metabolic syndrome Lower your risk of some cancers Strengthen your bones and muscles Improve your mental health and mood Improve your ability to do daily activities and prevent falls, if you're an older adult Increase your chances of living longer Fitting regular exercise into your daily schedule may seem difficult at first. But even ten minutes at a time is fine. The key is to find the right exercise for you. It should be fun and should match your abilities. Centers for Disease Control and Prevention

Physical Therapy see Rehabilitation

After a serious injury, illness or surgery, you may recover slowly. You may need to regain your strength, relearn skills or find new ways of doing things you did before. This process is rehabilitation. Rehabilitation often focuses on Physical therapy to help your strength, mobility and fitness Occupational therapy to help you with your daily activities Speech-language therapy to help with speaking, understanding, reading, writing and swallowing Treatment of pain The type of therapy and goals of therapy may be different for different people. An older person who has had a stroke may simply want rehabilitation to be able to dress or bathe without help. A younger person who has had a heart attack may go through cardiac rehabilitation to try to return to work and normal activities. Someone with a lung disease may get pulmonary rehabilitation to be able to breathe better and improve their quality of life.

Phytotherapy see Herbal Medicine

An herb is a plant or plant part used for its scent, flavor, or therapeutic properties. Herbal medicines are one type of dietary supplement. They are sold as tablets, capsules, powders, teas, extracts, and fresh or dried plants. People use herbal medicines to try to maintain or improve their health. Many people believe that products labeled "natural" are always safe and good for them. This is not necessarily true. Herbal medicines do not have to go through the testing that drugs do. Some herbs, such as comfrey and ephedra, can cause serious harm. Some herbs can interact with prescription or over-the-counter medicines. If you are thinking about using an herbal medicine, first get information on it from reliable sources. Make sure to tell your health care provider about any herbal medicines you are taking. NIH: National Center for Complementary and Integrative Health

Pica see Eating Disorders

Eating disorders are serious behavior problems. They can include severe overeating or not consuming enough food to stay healthy. They also involve extreme concern about your shape or weight. Types of eating disorders include Anorexia nervosa, in which you become too thin, but you don't eat enough because you think you are fat Bulimia nervosa, which involves periods of overeating followed by purging, sometimes through self-induced vomiting or using laxatives Binge-eating, which is out-of-control eating Women are more likely than men to have eating disorders. They usually start in the teenage years and often occur along with depression, anxiety disorders, and substance abuse. Eating disorders can lead to heart and kidney problems and even death. Getting help early is important. Treatment involves monitoring, talk therapy, nutritional counseling, and sometimes medicines. NIH: National Institute of Mental Health

PID see Pelvic Inflammatory Disease

Pelvic inflammatory disease (PID) is an infection and inflammation of the uterus, ovaries, and other female reproductive organs. It causes scarring in these organs. This can lead to infertility, ectopic pregnancy, pelvic pain, abscesses, and other serious problems. PID is the most common preventable cause of infertility in the United States. Gonorrhea and chlamydia, two sexually transmitted diseases, are the most common causes of PID. Other bacteria can also cause it. You are at greater risk if you Are sexually active and younger than 25 Have more than one sex partner Douche Some women have no symptoms. Others have pain in the lower abdomen, fever, smelly vaginal discharge, irregular bleeding, and pain during intercourse or urination. Doctors diagnose PID with a physical exam, lab tests, and imaging tests. Antibiotics can cure PID. Early treatment is important. Waiting too long increases the risk of infertility. NIH: National Institute of Allergy and Infectious Diseases

Piercing and Tattoos

Piercings and tattoos are body decorations that go back to ancient times. Body piercing involves making a hole in the skin so that you can insert jewelry. This is often in the earlobe, but can be in other parts of the body. Tattoos are designs on the skin made with needles and colored ink. A permanent tattoo is meant to last forever. Permanent makeup is a type of tattoo. The health risks of piercings and tattoos include Allergic reactions Keloids, a type of scar that forms during healing Infections, such as hepatitis To reduce the risks, make sure that the facility is clean, safe and has a good reputation. Proper sterilization of the equipment is important. Be sure to follow the instructions on caring for your skin. Holes from piercing usually close up if you no longer wear the jewelry. It is possible to remove tattoos, but it's painful and can cause scarring.

Piles see Hemorrhoids

Hemorrhoids are swollen, inflamed veins around the anus or lower rectum. They are either inside the anus or under the skin around the anus. They often result from straining to have a bowel movement. Other factors include pregnancy, aging and chronic constipation or diarrhea. Hemorrhoids are very common in both men and women. About half of all people have hemorrhoids by age 50. The most common symptom of hemorrhoids inside the anus is bright red blood covering the stool, on toilet paper or in the toilet bowl. Symptoms usually go away within a few days. If you have rectal bleeding you should see a doctor. You need to make sure bleeding is not from a more serious condition such as colorectal or anal cancer. Treatment may include warm baths and a cream or other medicine. If you have large hemorrhoids, you may need surgery and other treatments. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Pilonidal Cyst see Tailbone Disorders

The tailbone is the small bone at the bottom of your backbone, or spine. Tailbone disorders include tailbone injuries, pain, infections, cysts and tumors. You rarely break your tailbone. Instead, most injuries cause bruises or pulled ligaments. A backward fall onto a hard surface, such as slipping on ice, is the most common cause of such injuries. Symptoms of various tailbone disorders include pain in the tailbone area, pain upon sitting, pain or numbness in the arms or legs due to pressure on nerves in the tailbone area, and a mass or growth you can see or feel.

Pimples see Acne

Acne is a common skin disease that causes pimples. Pimples form when hair follicles under your skin clog up. Most pimples form on the face, neck, back, chest, and shoulders. Anyone can get acne, but it is common in teenagers and young adults. It is not serious, but it can cause scars. No one knows exactly what causes acne. Hormone changes, such as those during the teenage years and pregnancy, probably play a role. There are many myths about what causes acne. Chocolate and greasy foods are often blamed, but there is little evidence that foods have much effect on acne in most people. Another common myth is that dirty skin causes acne; however, blackheads and pimples are not caused by dirt. Stress doesn't cause acne, but stress can make it worse. If you have acne Clean your skin gently Try not to touch your skin Avoid the sun Treatments for acne include medicines and creams. NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Pinguecula see Eye Diseases

Some eye problems are minor and don't last long. But some can lead to a permanent loss of vision. Common eye problems include Refractive errors Cataracts - clouded lenses Optic nerve disorders, including glaucoma Retinal disorders - problems with the nerve layer at the back of the eye Macular degeneration - a disease that destroys sharp, central vision Diabetic eye problems Conjunctivitis - an infection also known as pinkeye Your best defense is to have regular checkups, because eye diseases do not always have symptoms. Early detection and treatment could prevent vision loss. See an eye care professional right away if you have a sudden change in vision, if everything looks dim, or if you see flashes of light. Other symptoms that need quick attention are pain, double vision, fluid coming from the eye, and inflammation. NIH: National Eye Institute

Pinkeye

Conjunctivitis is the medical name for pink eye. It involves inflammation of the outer layer of the eye and inside of the eyelid. It can cause swelling, itching, burning, discharge, and redness. Causes include Bacterial or viral infection Allergies Substances that cause irritation Contact lens products, eye drops, or eye ointments Pinkeye usually does not affect vision. Infectious pink eye can easily spread from one person to another. The infection will clear in most cases without medical care, but bacterial pinkeye needs treatment with antibiotic eye drops or ointment. NIH: National Eye Institute

Pinworms

Pinworms are small parasites that can live in the colon and rectum. You get them when you swallow their eggs. The eggs hatch inside your intestines. While you sleep, the female pinworms leave the intestines through the anus and lay eggs on nearby skin. Pinworms spread easily. When people who are infected touch their anus, the eggs attach to their fingertips. They can spread the eggs to others directly through their hands, or through contaminated clothing, bedding, food, or other articles. The eggs can live on household surfaces for up to 2 weeks. The infection is more common in children. Many people have no symptoms at all. Some people feel itching around the anus or vagina. The itching may become intense, interfere with sleep, and make you irritable. Your health care provider can diagnose pinworm infection by finding the eggs. A common way to collect the eggs is with a sticky piece of clear tape. Mild infections may not need treatment. If you do need medicine, everyone in the household should take it. To prevent becoming infected or reinfected with pinworms, Bathe after waking up Wash your pajamas and bed sheets often Wash your hands regularly, especially after using the bathroom or changing diapers Change your underwear every day Avoid nail biting Avoid scratching the anal area NIH: National Institute of Allergy and Infectious Diseases

Pituitary Disorders

Your pituitary gland is a pea-sized gland at the base of your brain. The pituitary is the "master control gland" - it makes hormones that affect growth and the functions of other glands in the body. With pituitary disorders, you often have too much or too little of one of your hormones. Injuries can cause pituitary disorders, but the most common cause is a pituitary tumor.

Pituitary Tumors

Your pituitary gland is a pea-sized gland at the base of your brain. The pituitary is the "master control gland" - it makes hormones that affect growth and the functions of other glands in the body. Pituitary tumors are common, but often they don't cause health problems. Most people with pituitary tumors never even know they have them. The most common type of pituitary tumor produces hormones and disrupts the balance of hormones in your body. This can cause endocrine diseases such as Cushing's syndrome and hyperthyroidism. Symptoms of pituitary tumors include Headaches Vision problems Nausea and vomiting Problems caused by the production of too many hormones Pituitary tumors are usually curable. Treatment is often surgery to remove the tumor. Other options include medicines, radiation therapy, and chemotherapy.

PKU see Phenylketonuria

Phenylketonuria (PKU) is a type of amino acid metabolism disorder. It is inherited. If you have it, your body can't process part of a protein called phenylalanine (Phe). Phe is in almost all foods. If your Phe level gets too high, it can damage your brain and cause severe intellectual disability. All babies born in U.S. hospitals must now have a screening test for PKU. This makes it easier to diagnose and treat the problem early. The best treatment for PKU is a diet of low-protein foods. There are special formulas for newborns. For older children and adults, the diet includes many fruits and vegetables. It also includes some low-protein breads, pastas and cereals. Nutritional formulas provide the vitamins and minerals you can't get from their food. Babies who get on this special diet soon after they are born develop normally. Many have no symptoms of PKU. It is important to stay on the diet for the rest of your life. NIH: National Institute of Child Health and Human Development

Plague

Plague is an infection caused by the bacterium Yersinia pestis. The bacteria are found mainly in rats and in the fleas that feed on them. People and other animals can get plague from rat or flea bites. In the past, plague destroyed entire civilizations. Today plague is uncommon, due to better living conditions and antibiotics. There are three forms of plague: Bubonic plague causes the tonsils, adenoids, spleen, and thymus to become inflamed. Symptoms include fever, aches, chills, and tender lymph glands. In septicemic plague, bacteria multiply in the blood. It causes fever, chills, shock, and bleeding under the skin or other organs. Pneumonic plague is the most serious form. Bacteria enter the lungs and cause pneumonia. People with the infection can spread this form to others. This type could be a bioterror agent. Lab tests can diagnose plague. Treatment is a strong antibiotic. There is no vaccine. NIH: National Institute of Allergy and Infectious Diseases

Plantar Fasciitis see Heel Injuries and Disorders

Heel problems are common and can be painful. Often, they result from too much stress on your heel bone and the tissues that surround it. That stress can come from Injuries Bruises that you get walking, running or jumping Wearing shoes that don't fit or aren't made well Being overweight These can lead to tendinitis, bursitis, and fasciitis, which are all types of inflammation of the tissues that surround your heel. Over time the stress can cause bone spurs and deformities. Certain diseases, such as rheumatoid arthritis and gout, can also lead to heel problems. Treatments for heel problems might include rest, medicines, exercises, taping, and special shoes. Surgery is rarely needed.

Plantar Warts see Warts

Warts are growths on your skin caused by an infection with humanpapilloma virus, or HPV. Types of warts include Common warts, which often appear on your fingers Plantar warts, which show up on the soles of your feet Genital warts, which are a sexually transmitted disease Flat warts, which appear in places you shave frequently In children, warts often go away on their own. In adults, they tend to stay. If they hurt or bother you, or if they multiply, you can remove them. Chemical skin treatments usually work. If not, various freezing, surgical and laser treatments can remove warts.

Plaque, Atherosclerotic see Atherosclerosis

Atherosclerosis is a disease in which plaque builds up inside your arteries. Plaque is a sticky substance made up of fat, cholesterol, calcium, and other substances found in the blood. Over time, plaque hardens and narrows your arteries. That limits the flow of oxygen-rich blood to your body. Atherosclerosis can lead to serious problems, including Coronary artery disease. These arteries supply blood to your heart. When they are blocked, you can suffer angina or a heart attack. Carotid artery disease. These arteries supply blood to your brain. When they are blocked you can suffer a stroke. Peripheral arterial disease. These arteries are in your arms, legs and pelvis. When they are blocked, you can suffer from numbness, pain and sometimes infections. Atherosclerosis usually doesn't cause symptoms until it severely narrows or totally blocks an artery. Many people don't know they have it until they have a medical emergency. A physical exam, imaging, and other diagnostic tests can tell if you have it. Medicines can slow the progress of plaque buildup. Your doctor may also recommend procedures such as angioplasty to open the arteries, or surgery on the coronary or carotid arteries. Lifestyle changes can also help. These include following a healthy diet, getting regular exercise, maintaining a healthy weight, quitting smoking, and managing stress. NIH: National Heart, Lung, and Blood Institute

Plaque, Dental see Gum Disease; Tooth Decay

If you have gum disease, you're not alone. Many U.S. adults currently have some form of the disease. It ranges from simple gum inflammation, called gingivitis, to serious damage to the tissue and bone supporting the teeth. In the worst cases, you can lose teeth. In gingivitis, the gums become red and swollen. They can bleed easily. Gingivitis is a mild form of gum disease. You can usually reverse it with daily brushing and flossing and regular cleanings by a dentist or dental hygienist. Untreated gingivitis can lead to periodontitis. If you have periodontitis, the gums pull away from the teeth and form pockets that become infected. If not treated, the bones, gums and connective tissue that support the teeth are destroyed. NIH: National Institute of Dental and Craniofacial Research

Plasma-cell Myeloma see Multiple Myeloma

Multiple myeloma is a cancer that begins in plasma cells, a type of white blood cell. These cells are part of your immune system, which helps protect the body from germs and other harmful substances. In time, myeloma cells collect in the bone marrow and in the solid parts of bones. No one knows the exact causes of multiple myeloma, but it is more common in older people and African Americans. It can run in families. Common symptoms may include Bone pain, often in the back or ribs Broken bones Weakness or fatigue Weight loss Frequent infections and fevers Feeling very thirsty Frequent urination Doctors diagnose multiple myeloma using lab tests, imaging tests, and a bone marrow biopsy. Your treatment depends on how advanced the disease is and whether you have symptoms. If you have no symptoms, you may not need treatment right away. If you have symptoms, you may have chemotherapy, stem cell transplantation, radiation, or targeted therapy. Targeted therapy uses substances that attack cancer cells without harming normal cells. NIH: National Cancer Institute

Plasmacytoma see Multiple Myeloma

Multiple myeloma is a cancer that begins in plasma cells, a type of white blood cell. These cells are part of your immune system, which helps protect the body from germs and other harmful substances. In time, myeloma cells collect in the bone marrow and in the solid parts of bones. No one knows the exact causes of multiple myeloma, but it is more common in older people and African Americans. It can run in families. Common symptoms may include Bone pain, often in the back or ribs Broken bones Weakness or fatigue Weight loss Frequent infections and fevers Feeling very thirsty Frequent urination Doctors diagnose multiple myeloma using lab tests, imaging tests, and a bone marrow biopsy. Your treatment depends on how advanced the disease is and whether you have symptoms. If you have no symptoms, you may not need treatment right away. If you have symptoms, you may have chemotherapy, stem cell transplantation, radiation, or targeted therapy. Targeted therapy uses substances that attack cancer cells without harming normal cells. NIH: National Cancer Institute

Plastic and Cosmetic Surgery

Surgeons can reshape the appearance of body parts through cosmetic surgery. Some of the most common body parts people want to improve through surgery include Breasts: Increase or reduce the size of breasts or reshape sagging breasts Ears: Reduce the size of large ears or set protruding ears back closer to the head Eyes: Correct drooping upper eyelids or remove puffy bags below the eyes Face: Remove facial wrinkles, creases or acne scars Hair: Fill in balding areas with one's own hair Nose: Change the shape of the nose Tummy: Flatten the abdomen

Platelet Disorders

Platelets are little pieces of blood cells. Platelets help wounds heal and prevent bleeding by forming blood clots. Your bone marrow makes platelets. Problems can result from having too few or too many platelets, or from platelets that do not work properly. If your blood has a low number of platelets, it is called thrombocytopenia. This can put you at risk for mild to serious bleeding. If your blood has too many platelets, you may have a higher risk of blood clots. With other platelet disorders, the platelets do not work as they should. For example, in von Willebrand Disease, the platelets cannot stick together or cannot attach to blood vessel walls. This can cause excessive bleeding. Treatment of platelet disorders depends on the cause. NIH: National Heart, Lung, and Blood Institute

Pleural Disorders

Your pleura is a large, thin sheet of tissue that wraps around the outside of your lungs and lines the inside of your chest cavity. Between the layers of the pleura is a very thin space. Normally it's filled with a small amount of fluid. The fluid helps the two layers of the pleura glide smoothly past each other as your lungs breathe air in and out. Disorders of the pleura include Pleurisy - inflammation of the pleura that causes sharp pain with breathing Pleural effusion - excess fluid in the pleural space Pneumothorax - buildup of air or gas in the pleural space Hemothorax - buildup of blood in the pleural space Many different conditions can cause pleural problems. Viral infection is the most common cause of pleurisy. The most common cause of pleural effusion is congestive heart failure. Lung diseases, like COPD, tuberculosis, and acute lung injury, cause pneumothorax. Injury to the chest is the most common cause of hemothorax. Treatment focuses on removing fluid, air, or blood from the pleural space, relieving symptoms, and treating the underlying condition. NIH: National Heart, Lung, and Blood Institute

Pleural Effusion see Pleural Disorders

Your pleura is a large, thin sheet of tissue that wraps around the outside of your lungs and lines the inside of your chest cavity. Between the layers of the pleura is a very thin space. Normally it's filled with a small amount of fluid. The fluid helps the two layers of the pleura glide smoothly past each other as your lungs breathe air in and out. Disorders of the pleura include Pleurisy - inflammation of the pleura that causes sharp pain with breathing Pleural effusion - excess fluid in the pleural space Pneumothorax - buildup of air or gas in the pleural space Hemothorax - buildup of blood in the pleural space Many different conditions can cause pleural problems. Viral infection is the most common cause of pleurisy. The most common cause of pleural effusion is congestive heart failure. Lung diseases, like COPD, tuberculosis, and acute lung injury, cause pneumothorax. Injury to the chest is the most common cause of hemothorax. Treatment focuses on removing fluid, air, or blood from the pleural space, relieving symptoms, and treating the underlying condition. NIH: National Heart, Lung, and Blood Institute

Pleurisy see Pleural Disorders

Your pleura is a large, thin sheet of tissue that wraps around the outside of your lungs and lines the inside of your chest cavity. Between the layers of the pleura is a very thin space. Normally it's filled with a small amount of fluid. The fluid helps the two layers of the pleura glide smoothly past each other as your lungs breathe air in and out. Disorders of the pleura include Pleurisy - inflammation of the pleura that causes sharp pain with breathing Pleural effusion - excess fluid in the pleural space Pneumothorax - buildup of air or gas in the pleural space Hemothorax - buildup of blood in the pleural space Many different conditions can cause pleural problems. Viral infection is the most common cause of pleurisy. The most common cause of pleural effusion is congestive heart failure. Lung diseases, like COPD, tuberculosis, and acute lung injury, cause pneumothorax. Injury to the chest is the most common cause of hemothorax. Treatment focuses on removing fluid, air, or blood from the pleural space, relieving symptoms, and treating the underlying condition. NIH: National Heart, Lung, and Blood Institute

Plumbism see Lead Poisoning

Lead is a metal that occurs naturally in the earth's crust. Lead can be found in all parts of our environment. Much of it comes from human activities such as mining and manufacturing. Lead used to be in paint; older houses may still have lead paint. You could be exposed to lead by Eating food or drinking water that contains lead. Water pipes in older homes may contain lead. Working in a job where lead is used Using lead in a hobby, such as making stained glass or lead-glazed pottery Using folk remedies such as herbs or foods that contain lead Breathing air, drinking water, eating food, or swallowing or touching dirt that contains lead can cause many health problems. Lead can affect almost every organ and system in your body. In adults, lead can increase blood pressure and cause infertility, nerve disorders, and muscle and joint pain. It can also make you irritable and affect your ability to concentrate and remember. Lead is especially dangerous for children. A child who swallows large amounts of lead may develop anemia, severe stomachache, muscle weakness, and brain damage. Even at low levels, lead can affect a child's mental and physical growth. Agency for Toxic Substances Disease Registry

PMS see Premenstrual Syndrome

Premenstrual syndrome, or PMS, is a group of symptoms that start one to two weeks before your period. Most women have at least some symptoms of PMS, and the symptoms go away after their periods start. For some women, the symptoms are severe enough to interfere with their lives. They have a type of PMS called premenstrual dysphoric disorder, or PMDD. Common PMS symptoms include Breast swelling and tenderness Acne Bloating and weight gain Pain - headache or joint pain Food cravings Irritability, mood swings, crying spells, depression No one knows what causes PMS, but hormonal changes trigger the symptoms. No single PMS treatment works for everyone. Over-the-counter pain relievers such as ibuprofen, aspirin or naproxen may help ease cramps, headaches, backaches and breast tenderness. Exercising, getting enough sleep, and avoiding salt, caffeine, and alcohol can also help. Dept. of Health and Human Services Office on Women's Health

Pneumococcal Infections

Pneumococci are a type of streptococcus bacteria. The bacteria spread through contact with people who are ill or by healthy people who carry the bacteria in the back of their nose. Pneumococcal infections can be mild or severe. The most common types of infections are Ear infections Sinus infections Pneumonia Sepsis Meningitis How the diagnosis is made depends upon where the infection is. Your doctor will do a physical exam and health history. Possible tests may include blood, imaging, or lab tests. Treatment is with antibiotics. Vaccines can prevent pneumococcal infections. There are two vaccines. One is for infants and young children. The other is for people at high risk, including those who are over 65 years old, have chronic illnesses or weak immune systems, smoke, have asthma, or live in long-term care facilities. Centers for Disease Control and Prevention

Pneumoconiosis see Interstitial Lung Diseases

Interstitial lung disease is the name for a large group of diseases that inflame or scar the lungs. The inflammation and scarring make it hard to get enough oxygen. The scarring is called pulmonary fibrosis. Breathing in dust or other particles in the air is responsible for some types of interstitial lung diseases. Specific types include Black lung disease among coal miners, from inhaling coal dust Farmer's lung, from inhaling farm dust Asbestosis, from inhaling asbestos fibers Siderosis, from inhaling iron from mines or welding fumes Silicosis, from inhaling silica dust Other causes include autoimmune diseases or occupational exposures to molds, gases, or fumes. Some types of interstitial lung disease have no known cause. Treatment depends on the type of exposure and the stage of the disease. It may involve medicines, oxygen therapy, or a lung transplant in severe cases.

Pneumocystis Infections

Pneumocystis jirovecii is a tiny fungus that lives in the lungs of many people. Most people's immune systems keep the fungus under control. But if you have a weakened immune system, the fungus can make you very sick. The most common type of infection is pneumocystis pneumonia (PCP). PCP once was the major cause of death for people with HIV/AIDS. But now, it is possible to prevent or treat most cases. The key to surviving PCP is early treatment. The first signs of PCP are fever, dry cough, shortness of breath, and fatigue. If you have a weakened immune system and have these symptoms, see your doctor right away. To diagnose PCP, doctors use a microscope to look for the fungus in a sample of lung fluid or tissue. Treatment is with antibiotics. There is no vaccine to prevent PCP. Some people who are at high risk of getting PCP may need to take antibiotics to prevent it.

Pneumonia

Pneumonia is an infection in one or both of the lungs. Many germs, such as bacteria, viruses, and fungi, can cause pneumonia. You can also get pneumonia by inhaling a liquid or chemical. People most at risk are older than 65 or younger than 2 years of age, or already have health problems. Symptoms of pneumonia vary from mild to severe. See your doctor promptly if you Have a high fever Have shaking chills Have a cough with phlegm that doesn't improve or gets worse Develop shortness of breath with normal daily activities Have chest pain when you breathe or cough Feel suddenly worse after a cold or the flu Your doctor will use your medical history, a physical exam, and lab tests to diagnose pneumonia. Treatment depends on what kind you have. If bacteria are the cause, antibiotics should help. If you have viral pneumonia, your doctor may prescribe an antiviral medicine to treat it. Preventing pneumonia is always better than treating it. Vaccines are available to prevent pneumococcal pneumonia and the flu. Other preventive measures include washing your hands frequently and not smoking. NIH: National Heart, Lung, and Blood Institute

Pneumonic Plague see Plague

Plague is an infection caused by the bacterium Yersinia pestis. The bacteria are found mainly in rats and in the fleas that feed on them. People and other animals can get plague from rat or flea bites. In the past, plague destroyed entire civilizations. Today plague is uncommon, due to better living conditions and antibiotics. There are three forms of plague: Bubonic plague causes the tonsils, adenoids, spleen, and thymus to become inflamed. Symptoms include fever, aches, chills, and tender lymph glands. In septicemic plague, bacteria multiply in the blood. It causes fever, chills, shock, and bleeding under the skin or other organs. Pneumonic plague is the most serious form. Bacteria enter the lungs and cause pneumonia. People with the infection can spread this form to others. This type could be a bioterror agent. Lab tests can diagnose plague. Treatment is a strong antibiotic. There is no vaccine. NIH: National Institute of Allergy and Infectious Diseases

Pneumothorax see Collapsed Lung; Pleural Disorders

A collapsed lung happens when air enters the pleural space, the area between the lung and the chest wall. If it is a total collapse, it is called pneumothorax. If only part of the lung is affected, it is called atelectasis. Causes of a collapsed lung include Lung diseases such as pneumonia or lung cancer Being on a breathing machine Surgery on the chest or abdomen A blocked airway If only a small area of the lung is affected, you may not have symptoms. If a large area is affected, you may feel short of breath and have a rapid heart rate. A chest x-ray can tell if you have it. Treatment depends on the underlying cause. NIH: National Heart, Lung, and Blood Institute

Poison Ivy, Oak, and Sumac

If you spend time outdoors, chances are you have been bothered by poison ivy, poison oak or poison sumac at some point. Most people are sensitive to the plants' oily sap. The sap is in the root, stems, leaves and fruit of these plants. If it gets on your skin, it causes a blistering skin rash. The rash can range from mild to severe, depending on how much sap gets on your skin and how sensitive you are to it. Problems can also happen if the plants are burned. Airborne sap-coated soot can get into the eyes, nose, throat and respiratory system. The best way to avoid the rash is to learn what the plants look like and stay away from them. If you come into contact with the plants, wash your skin and clothing right away. If you develop a rash, ask your pharmacist about over-the-counter medicines. For severe rashes, see your doctor. National Park Service

Poison Oak see Poison Ivy, Oak, and Sumac

If you spend time outdoors, chances are you have been bothered by poison ivy, poison oak or poison sumac at some point. Most people are sensitive to the plants' oily sap. The sap is in the root, stems, leaves and fruit of these plants. If it gets on your skin, it causes a blistering skin rash. The rash can range from mild to severe, depending on how much sap gets on your skin and how sensitive you are to it. Problems can also happen if the plants are burned. Airborne sap-coated soot can get into the eyes, nose, throat and respiratory system. The best way to avoid the rash is to learn what the plants look like and stay away from them. If you come into contact with the plants, wash your skin and clothing right away. If you develop a rash, ask your pharmacist about over-the-counter medicines. For severe rashes, see your doctor. National Park Service

Poison Sumac see Poison Ivy, Oak, and Sumac

If you spend time outdoors, chances are you have been bothered by poison ivy, poison oak or poison sumac at some point. Most people are sensitive to the plants' oily sap. The sap is in the root, stems, leaves and fruit of these plants. If it gets on your skin, it causes a blistering skin rash. The rash can range from mild to severe, depending on how much sap gets on your skin and how sensitive you are to it. Problems can also happen if the plants are burned. Airborne sap-coated soot can get into the eyes, nose, throat and respiratory system. The best way to avoid the rash is to learn what the plants look like and stay away from them. If you come into contact with the plants, wash your skin and clothing right away. If you develop a rash, ask your pharmacist about over-the-counter medicines. For severe rashes, see your doctor. National Park Service

Poisoning

A poison is any substance that is harmful to your body. You might swallow it, inhale it, inject it, or absorb it through your skin. Any substance can be poisonous if too much is taken. Poisons can include Prescription or over-the-counter medicines taken in doses that are too high Overdoses of illegal drugs Carbon monoxide from gas appliances Household products, such as laundry powder or furniture polish Pesticides Indoor or outdoor plants Metals such as lead and mercury The effects of poisoning range from short-term illness to brain damage, coma, and death. To prevent poisoning it is important to use and store products exactly as their labels say. Keep dangerous products where children can't get to them. Treatment for poisoning depends on the type of poison. If you suspect someone has been poisoned, call your local poison control center right away.

Poisons in the Home see Household Products

The products you use for cleaning, carpentry, auto repair, gardening, and many other household uses can contain ingredients that can harm you, your family, and the environment. These include Oven and drain cleaners Laundry powder Floor polish Paint thinners, strippers and removers Pesticides Grease and rust removers Motor oil and fuel additives Arts and craft supplies Toxic substances in these products can cause harm if inhaled, swallowed, or absorbed through the skin. People respond to toxic substances in different ways. At high doses a toxic substance might cause birth defects or other serious problems, including brain damage or death. To avoid problems, keep products in the containers they come in and use them exactly as the label says. Follow label directions or get medical help if you swallow, inhale or get them on your skin. Environmental Protection Agency

Polio and Post-Polio Syndrome

Polio is an infectious disease caused by a virus. The virus lives in an infected person's throat and intestines. It is most often spread by contact with the stool of an infected person. You can also get it from droplets if an infected person sneezes or coughs. It can contaminate food and water if people do not wash their hands. Most people have no symptoms. If you have symptoms, they may include fever, fatigue, nausea, headache, flu-like symptoms, stiff neck and back, and pain in the limbs. A few people will become paralyzed. There is no treatment to reverse the paralysis of polio. Some people who've had polio develop post-polio syndrome (PPS) years later. Symptoms include tiredness, new muscle weakness, and muscle and joint pain. There is no way to prevent or cure PPS. The polio vaccine has wiped out polio in the United States and most other countries. Centers for Disease Control and Prevention

Poliomyelitis see Polio and Post-Polio Syndrome

Polio is an infectious disease caused by a virus. The virus lives in an infected person's throat and intestines. It is most often spread by contact with the stool of an infected person. You can also get it from droplets if an infected person sneezes or coughs. It can contaminate food and water if people do not wash their hands. Most people have no symptoms. If you have symptoms, they may include fever, fatigue, nausea, headache, flu-like symptoms, stiff neck and back, and pain in the limbs. A few people will become paralyzed. There is no treatment to reverse the paralysis of polio. Some people who've had polio develop post-polio syndrome (PPS) years later. Symptoms include tiredness, new muscle weakness, and muscle and joint pain. There is no way to prevent or cure PPS. The polio vaccine has wiped out polio in the United States and most other countries. Centers for Disease Control and Prevention

Pollen Allergy see Hay Fever

Each spring, summer, and fall, trees, weeds, and grasses release tiny pollen grains into the air. Some of the pollen ends up in your nose and throat. This can trigger a type of allergy called hay fever. Symptoms can include Sneezing, often with a runny or clogged nose Coughing and postnasal drip Itching eyes, nose and throat Red and watery eyes Dark circles under the eyes Your health care provider may diagnose hay fever based on a physical exam and your symptoms. Sometimes skin or blood tests are used. Taking medicines and using nasal sprays can relieve symptoms. You can also rinse out your nose, but be sure to use distilled or sterilized water with saline. Allergy shots can help make you less sensitive to pollen and provide long-term relief. NIH: National Institute of Allergy and Infectious Diseases

Pollution see Air Pollution; Indoor Air Pollution; Water Pollution

Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog. Some air pollutants are poisonous. Inhaling them can increase the chance you'll have health problems. People with heart or lung disease, older adults and children are at greater risk from air pollution. Air pollution isn't just outside - the air inside buildings can also be polluted and affect your health. Environmental Protection Agency

Polychondritis see Cartilage Disorders

Cartilage is the tough but flexible tissue that covers the ends of your bones at a joint. It also gives shape and support to other parts of your body, such as your ears, nose and windpipe. Healthy cartilage helps you move by allowing your bones to glide over each other. It also protects bones by preventing them from rubbing against each other. Injured, inflamed, or damaged cartilage can cause symptoms such as pain and limited movement. It can also lead to joint damage and deformity. Causes of cartilage problems include Tears and injuries, such as sports injuries Genetic factors Other disorders, such as some types of arthritis Osteoarthritis results from breakdown of cartilage. NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Polycystic Kidney Disease see Kidney Cysts; Kidney Diseases

A cyst is a fluid-filled sac. You may get simple kidney cysts as you age; they are usually harmless. There are also some diseases which cause kidney cysts. One type is polycystic kidney disease (PKD). It runs in families. In PKD, many cysts grow in the kidneys. This can enlarge the kidneys and make them work poorly. About half of people with the most common type of PKD end up with kidney failure. PKD also causes cysts in other parts of the body, such as the liver. Often, there are no symptoms at first. Later, symptoms include Pain in the back and lower sides Headaches Blood in the urine Doctors diagnose PKD with imaging tests and family history. There is no cure. Treatments can help with symptoms and complications. They include medicines and lifestyle changes, and if there is kidney failure, dialysis or kidney transplants. Acquired cystic kidney disease (ACKD) happens in people who have chronic kidney disease, especially if they are on dialysis. Unlike PKD, the kidneys are normal sized, and cysts do not form in other parts of the body. ACKD often has no symptoms. Usually, the cysts are harmless and do not need treatment. If they do cause complications, treatments include medicines, draining the cysts, or surgery. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Polycystic Ovary Syndrome

Polycystic ovary syndrome (PCOS) happens when a woman's ovaries or adrenal glands produce more male hormones than normal. PCOS causes cysts (fluid-filled sacs) to grow on the ovaries. Symptoms include Irregular menstrual periods Infertility Pelvic pain Excess hair growth on the face, chest, stomach, or thighs Weight gain Acne or oily skin Patches of thickened skin Women with PCOS are at higher risk of diabetes, metabolic syndrome, heart disease, and high blood pressure. PCOS is more common in women who are obese, or have a mother or sister with PCOS. To diagnose PCOS, your health care provider may do a physical exam, pelvic exam, blood tests, and an ultrasound. There is no cure, but diet, exercise, and medicines can help control the symptoms. Birth control pills help women have normal periods, reduce male hormone levels, and clear acne. Treatments for infertility caused by PCOS may include medicines, surgery, and in vitro fertilization (IVF). NIH: National Institute of Child Health and Human Development

Polymyalgia Rheumatica

Polymyalgia rheumatica is a disorder that causes muscle pain and stiffness in your neck, shoulders, and hips. It is most common in women and almost always occurs in people over 50. The main symptom is stiffness after resting. Other symptoms include fever, weakness and weight loss. In some cases, polymyalgia rheumatica develops overnight. In others, it is gradual. The cause is not known. There is no single test to diagnose polymyalgia rheumatica. Your doctor will use your medical history, symptoms, and a physical exam to make the diagnosis. Lab tests for inflammation may help confirm the diagnosis. Polymyalgia rheumatica sometimes occurs along with giant cell arteritis, a condition that causes swelling of the arteries in your head. Symptoms include headaches and blurred vision. Doctors often prescribe prednisone, a steroid medicine, for both conditions. With treatment, polymyalgia rheumatica usually disappears in a day or two. Without treatment, it usually goes away after a year or more. NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Polymyositis see Myositis

Myositis means inflammation of the muscles that you use to move your body. An injury, infection, or autoimmune disease can cause it. Two specific kinds are polymyositis and dermatomyositis. Polymyositis causes muscle weakness, usually in the muscles closest to the trunk of your body. Dermatomyositis causes muscle weakness, plus a skin rash. Other symptoms of myositis may include Fatigue after walking or standing Tripping or falling Trouble swallowing or breathing Doctors may use a physical exam, lab tests, imaging tests and a muscle biopsy to diagnose myositis. There is no cure for these diseases, but you can treat the symptoms. Polymyositis and dermatomyositis are first treated with high doses of a corticosteroid. Other options include medications, physical therapy, exercise, heat therapy, assistive devices, and rest. NIH: National Institute of Neurological Disorders and Stroke

Poop see Bowel Movement

A bowel movement is the last stop in the movement of food through your digestive tract. Your stool passes out of your body through the rectum and anus. Another name for stool is feces. It is made of what is left after your digestive system (stomach, small intestine, and colon) absorbs nutrients and fluids from what you eat and drink. Sometimes a bowel movement isn't normal. Diarrhea happens when stool passes through the large intestine too quickly. Constipation occurs when stool passes through the large intestine too slowly. Bowel incontinence is a problem controlling your bowel movements. Other abnormalities with bowel movements may be a sign of a digestive problem. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Porphyria

Porphyrias are a group of genetic disorders caused by problems with how your body makes a substance called heme. Heme is found throughout the body, especially in your blood and bone marrow, where it carries oxygen. There are two main types of porphyrias. One affects the skin and the other affects the nervous system. People with the skin type develop blisters, itching, and swelling of their skin when it is exposed to sunlight. The nervous system type is called acute porphyria. Symptoms include pain in the chest, abdomen, limbs, or back; muscle numbness, tingling, paralysis, or cramping; vomiting; constipation; and personality changes or mental disorders. These symptoms come and go. Certain triggers can cause an attack, including some medicines, smoking, drinking alcohol, infections, stress, and sun exposure. Attacks develop over hours or days. They can last for days or weeks. Porphyria can be hard to diagnose. It requires blood, urine, and stool tests. Each type of porphyria is treated differently. Treatment may involve avoiding triggers, receiving heme through a vein, taking medicines to relieve symptoms, or having blood drawn to reduce iron in the body. People who have severe attacks may need to be hospitalized. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Positional Plagiocephaly see Craniofacial Abnormalities

Craniofacial is a medical term that relates to the bones of the skull and face. Craniofacial abnormalities are birth defects of the face or head. Some, like cleft lip and palate, are among the most common of all birth defects. Others are very rare. Most of them affect how a person's face or head looks. These conditions may also affect other parts of the body. Treatment depends on the type of problem. Plastic and reconstructive surgery may help the person's appearance.

Post-herpetic Neuralgia see Shingles

Shingles is a disease caused by the varicella-zoster virus - the same virus that causes chickenpox. After you have chickenpox, the virus stays in your body. It may not cause problems for many years. As you get older, the virus may reappear as shingles. Although it is most common in people over age 50, anyone who has had chickenpox is at risk. You can't catch shingles from someone who has it. However, if you have a shingles rash, you can pass the virus to someone who has never had chickenpox. This would usually be a child, who could get chickenpox instead of shingles. The virus spreads through direct contact with the rash, and cannot spread through the air. Early signs of shingles include burning or shooting pain and tingling or itching, usually on one side of the body or face. The pain can be mild to severe. Rashes or blisters appear anywhere from one to 14 days later. If shingles appears on your face, it may affect your vision or hearing. The pain of shingles may last for weeks, months, or even years after the blisters have healed. There is no cure for shingles. Early treatment with medicines that fight the virus may help. These medicines may also help prevent lingering pain. A vaccine may prevent shingles or lessen its effects. The vaccine is recommended for people 60 or over. In some cases doctors may give it to people ages 50 to 59. NIH: National Institute of Allergy and Infectious Diseases

Post-polio Syndrome see Polio and Post-Polio Syndrome

Polio is an infectious disease caused by a virus. The virus lives in an infected person's throat and intestines. It is most often spread by contact with the stool of an infected person. You can also get it from droplets if an infected person sneezes or coughs. It can contaminate food and water if people do not wash their hands. Most people have no symptoms. If you have symptoms, they may include fever, fatigue, nausea, headache, flu-like symptoms, stiff neck and back, and pain in the limbs. A few people will become paralyzed. There is no treatment to reverse the paralysis of polio. Some people who've had polio develop post-polio syndrome (PPS) years later. Symptoms include tiredness, new muscle weakness, and muscle and joint pain. There is no way to prevent or cure PPS. The polio vaccine has wiped out polio in the United States and most other countries. Centers for Disease Control and Prevention

Post-Traumatic Stress Disorder

Post-traumatic stress disorder (PTSD) is a real illness. You can get PTSD after living through or seeing a traumatic event, such as war, a hurricane, sexual assault, physical abuse, or a bad accident. PTSD makes you feel stressed and afraid after the danger is over. It affects your life and the people around you. PTSD can cause problems like Flashbacks, or feeling like the event is happening again Trouble sleeping or nightmares Feeling alone Angry outbursts Feeling worried, guilty, or sad PTSD starts at different times for different people. Signs of PTSD may start soon after a frightening event and then continue. Other people develop new or more severe signs months or even years later. PTSD can happen to anyone, even children. Treatment may include talk therapy, medicines, or both. Treatment might take 6 to 12 weeks. For some people, it takes longer. NIH: National Institute of Mental Health

Postoperative Care see After Surgery

After any operation, you'll have some side effects. There is usually some pain with surgery. There may also be swelling and soreness around the area that the surgeon cut. Your surgeon can tell you which side effects to expect. There can also be complications. These are unplanned events linked to the operation. Some complications are infection, too much bleeding, reaction to anesthesia, or accidental injury. Some people have a greater risk of complications because of other medical conditions. Your surgeon can tell you how you might feel and what you will be able to do - or not do - the first few days, weeks, or months after surgery. Some other questions to ask are How long you will be in the hospital What kind of supplies, equipment, and help you might need when you go home When you can go back to work When it is ok to start exercising again Are they any other restrictions in your activities Following your surgeon's advice can help you recover as soon as possible. Agency for Healthcare Quality and Research

Postpartum Care

Taking home a new baby is one of the happiest times in a woman's life. But it also presents both physical and emotional challenges. Get as much rest as possible. You may find that all you can do is eat, sleep, and care for your baby. And that is perfectly okay. You will have spotting or bleeding, like a menstrual period, off and on for up to six weeks. You might also have swelling in your legs and feet, feel constipated, have menstrual-like cramping. Even if you are not breastfeeding, you can have milk leaking from your nipples, and your breasts might feel full, tender, or uncomfortable. Follow your doctor's instructions on how much activity, like climbing stairs or walking, you can do for the next few weeks. Doctors usually recommend that you abstain from sexual intercourse for four to six weeks after birth. In addition to physical changes, you may feel sad or have the "baby blues." If you are extremely sad or are unable to care for yourself or your baby, you might have a serious condition called postpartum depression. Dept. of Health and Human Services Office on Women's Health

Postpartum Depression

Many women have the baby blues after childbirth. If you have the baby blues, you may have mood swings, feel sad, anxious or overwhelmed, have crying spells, lose your appetite, or have trouble sleeping. The baby blues most often go away within a few days or a week. The symptoms are not severe and do not need treatment. The symptoms of postpartum depression last longer and are more severe. You may also feel hopeless and worthless, and lose interest in the baby. You may have thoughts of hurting yourself or the baby. Very rarely, new mothers develop something even more serious. They may have hallucinations or try to hurt themselves or the baby. They need to get treatment right away, often in the hospital. Postpartum depression can begin anytime within the first year after childbirth. The cause is not known. Hormonal and physical changes after birth and the stress of caring for a new baby may play a role. Women who have had depression are at higher risk. If you think you have postpartum depression, tell your health care provider. Medicines, including antidepressants and talk therapy can help you get well. Dept. of Health and Human Services Office on Women's Health

Postural Orthostatic Tachycardia Syndrome see Autonomic Nervous System Disorders

Your autonomic nervous system is the part of your nervous system that controls involuntary actions, such as the beating of your heart and the widening or narrowing of your blood vessels. When something goes wrong in this system, it can cause serious problems, including Blood pressure problems Heart problems Trouble with breathing and swallowing Erectile dysfunction in men Autonomic nervous system disorders can occur alone or as the result of another disease, such as Parkinson's disease, alcoholism and diabetes. Problems can affect either part of the system, as in complex regional pain syndromes, or all of the system. Some types are temporary, but many worsen over time. When they affect your breathing or heart function, these disorders can be life-threatening. Some autonomic nervous system disorders get better when an underlying disease is treated. Often, however, there is no cure. In that case, the goal of treatment is to improve symptoms. NIH: National Institute of Neurological Disorders and Stroke

Potassium

Potassium is a mineral that your body needs to work properly. It is a type of electrolyte. It helps your nerves to function and muscles to contract. It helps your heartbeat stay regular. It also helps move nutrients into cells and waste products out of cells. A diet rich in potassium helps to offset some of sodium's harmful effects on blood pressure. Many people get all the potassium they need from what they eat and drink. Sources of potassium in the diet include Leafy greens, such as spinach and collards Fruit from vines, such as grapes and blackberries Root vegetables, such as carrots and potatoes Citrus fruits, such as oranges and grapefruit Your kidneys help to keep the right amount of potassium in your body. If you have chronic kidney disease, your kidneys may not remove extra potassium from the blood. Some medicines also can raise your potassium level. You may need a special diet to lower the amount of potassium that you eat.

Potty Training see Toilet Training

Is your child ready to use a potty? Children are usually ready around ages 18-24 months. They often signal that they are ready by letting you know when their diapers need changing. You should be prepared to commit to three months of daily encouragement. Successful trips to the potty should be rewarded. Accidents shouldn't get as much attention. Training requires patience. If it is not successful, it may mean your child is not ready. If there are major changes in your family's life, such as moving or having a new baby, it may not be a good time to start potty training.

PPS see Polio and Post-Polio Syndrome

Polio is an infectious disease caused by a virus. The virus lives in an infected person's throat and intestines. It is most often spread by contact with the stool of an infected person. You can also get it from droplets if an infected person sneezes or coughs. It can contaminate food and water if people do not wash their hands. Most people have no symptoms. If you have symptoms, they may include fever, fatigue, nausea, headache, flu-like symptoms, stiff neck and back, and pain in the limbs. A few people will become paralyzed. There is no treatment to reverse the paralysis of polio. Some people who've had polio develop post-polio syndrome (PPS) years later. Symptoms include tiredness, new muscle weakness, and muscle and joint pain. There is no way to prevent or cure PPS. The polio vaccine has wiped out polio in the United States and most other countries. Centers for Disease Control and Prevention

Prader-Willi Syndrome

Prader-Willi Syndrome (PWS) is a rare genetic disorder. It causes poor muscle tone, low levels of sex hormones and a constant feeling of hunger. The part of the brain that controls feelings of fullness or hunger does not work properly in people with PWS. They overeat, leading to obesity. Babies with PWS are usually floppy, with poor muscle tone, and have trouble sucking. Boys may have undescended testicles. Later, other signs appear. These include Short stature Poor motor skills Weight gain Underdeveloped sex organs Mild intellectual and learning disabilities There is no cure for PWS. Growth hormone, exercise, and dietary supervision can help build muscle mass and control weight. Other treatments may include sex hormones and behavior therapy. Most people with PWS will need specialized care and supervision throughout their lives. NIH: National Institute of Child Health and Human Development

Preconception Care

If you are trying to have a baby or are just thinking about it, it is not too early to prepare for a safe pregnancy and a healthy baby. You should see your health care provider for preconception care. Preconception care is care you receive before you get pregnant. Your health care provider can help you figure out which steps you need to take now, such as Finding and taking care of any problems that might affect you and your baby later, like diabetes or high blood pressure Increasing the amount of folic acid you get to prevent neural tube defects Getting up to date on vaccines Avoiding smoking, drinking alcohol, or taking drugs Trying to reach a healthy weight By taking action on health issues before pregnancy, you can prevent many future problems for yourself and your baby. Once you're pregnant, you'll get prenatal care until your baby is born. NIH: National Institute of Child Health and Human Development

Prediabetes

Prediabetes means you have blood glucose, or blood sugar, levels that are higher than normal but not high enough to be called diabetes. Glucose comes from the foods you eat. Too much glucose in your blood can damage your body over time. If you have prediabetes, you are more likely to develop type 2 diabetes, heart disease, and stroke. Most people with prediabetes don't have any symptoms. Your doctor can use an A1C test or another blood test to find out if your blood glucose levels are higher than normal. If you are 45 years old or older, your doctor may recommend that you be tested for prediabetes, especially if you are overweight. Losing weight - at least 5 to 10 percent of your starting weight - can prevent or delay diabetes or even reverse prediabetes. That's 10 to 20 pounds for someone who weighs 200 pounds. You can lose weight by cutting down on the amount of calories and fat you eat and being physically active at least 30 minutes a day. Being physically active makes your body's insulin work better. Your doctor may also prescribe medicine to help control the amount of glucose in your blood. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Prednisone see Steroids

You may have heard of anabolic steroids, which can have harmful effects. But there's another type of steroid - sometimes called a corticosteroid - that treats a variety of problems. These steroids are similar to hormones that your adrenal glands make to fight stress associated with illnesses and injuries. They reduce inflammation and affect the immune system. You may need to take corticosteroids to treat Arthritis Asthma Autoimmune diseases such as lupus and multiple sclerosis Skin conditions such as eczema and rashes Some kinds of cancer Steroids are strong medicines, and they can have side effects, including weakened bones and cataracts. Because of this, you usually take them for as short a time as possible.

Preeclampsia see High Blood Pressure in Pregnancy

If you are pregnant, high blood pressure can cause problems for you and your unborn baby. You may have had high blood pressure before you got pregnant. Or you may get it once you are pregnant - a condition called gestational hypertension. Either one can cause low birth weight or premature delivery of the baby. Controlling your blood pressure during pregnancy and getting regular prenatal care are important for the health of you and your baby. Treatments for high blood pressure in pregnancy may include close monitoring of the baby, lifestyle changes, and certain medicines. Some pregnant women with high blood pressure develop preeclampsia. It's a sudden increase in blood pressure after the 20th week of pregnancy. It can be life-threatening for both you and the unborn baby. There is no proven way to prevent it. Most women who have signs of preeclampsia are closely monitored to lessen or avoid complications. The only way to "cure" preeclampsia is to deliver the baby. NIH: National Heart, Lung, and Blood Institute

Preemies see Premature Babies

Almost 1 of every 10 infants born in the United States are premature, or preemies. A premature birth is when a baby is born before 37 completed weeks of pregnancy. A full-term pregnancy is 40 weeks. Important growth and development happen throughout pregnancy - especially in the final months and weeks. Because they are born too early, preemies weigh much less than full-term babies. They may have health problems because their organs did not have enough time to develop. Problems that a baby born too early may have include Breathing problems Feeding difficulties Cerebral palsy Developmental delay Vision problems Hearing problems Preemies need special medical care in a neonatal intensive care unit, or NICU. They stay there until their organ systems can work on their own. Centers for Disease Control and Prevention

Pregnancy

So you're going to have a baby! Whether you are pregnant or are planning to get pregnant, you will want to give your baby a healthy start. You need to have regular visits with your healthcare provider. These prenatal care visits are very important for your baby and yourself. Some things you might do when you are pregnant could hurt your baby, such as smoking or drinking. Some medicines can also be a problem, even ones that a doctor prescribed. You will need to drink plenty of fluids and eat a healthy diet. You may also be tired and need more rest. Your body will change as your baby grows during the nine months of your pregnancy. Don't hesitate to call your health care provider if you think you have a problem or something is bothering or worrying you.

Pregnancy and AIDS see HIV/AIDS and Pregnancy

If you have HIV/AIDS and find out you are pregnant or think you may be pregnant, you should let your health care provider know as soon as possible. Some HIV/AIDS medicines may harm your baby. Your health care provider may want you to take different medicines or change the doses. It is also possible to give HIV to your baby. This is most likely to happen around the time you give birth. For this reason, treatment during this time is very important for protecting your baby from infection. Several treatments may prevent the virus from spreading from you to your baby. Your health care provider can recommend the best one for you. Your baby will also need to have treatment for at least the first six weeks of life. Regular testing will be needed to find out if your baby is infected.

Pregnancy and Diabetes see Diabetes and Pregnancy

Diabetes is a disease in which your blood glucose, or blood sugar, levels are too high. When you are pregnant, high blood sugar levels are not good for your baby. About seven out of every 100 pregnant women in the United States get gestational diabetes. Gestational diabetes is diabetes that happens for the first time when a woman is pregnant. Most of the time, it goes away after you have your baby. But it does increase your risk for developing type 2 diabetes later on. Your child is also at risk for obesity and type 2 diabetes. Most women get a test to check for diabetes during their second trimester of pregnancy. Women at higher risk may get a test earlier. If you already have diabetes, the best time to control your blood sugar is before you get pregnant. High blood sugar levels can be harmful to your baby during the first weeks of pregnancy - even before you know you are pregnant. To keep you and your baby healthy, it is important to keep your blood sugar as close to normal as possible before and during pregnancy. Either type of diabetes during pregnancy increases the chances of problems for you and your baby. To help lower the chances talk to your health care team about A meal plan for your pregnancy A safe exercise plan How often to test your blood sugar Taking your medicine as prescribed. Your medicine plan may need to change during pregnancy. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Pregnancy and Health Problems see Health Problems in Pregnancy

Every pregnancy has some risk of problems. The causes can be conditions you already have or conditions you develop. They also include being pregnant with more than one baby, previous problem pregnancies, or being over age 35. They can affect your health and the health of your baby. If you have a chronic condition, you should talk to your health care provider about how to minimize your risk before you get pregnant. Once you are pregnant, you may need a health care team to monitor your pregnancy. Examples of common conditions that can complicate a pregnancy include Heart disease High blood pressure Kidney problems Autoimmune disorders Sexually transmitted diseases Diabetes Cancer Infections Other conditions that can make pregnancy risky can happen while you are pregnant - for example, gestational diabetes and Rh incompatibility. Good prenatal care can help detect and treat them. Some discomforts, like nausea, back pain, and fatigue, are common during pregnancy. Sometimes it is hard to know what is normal. Call your doctor or midwife if something is bothering or worrying you.

Pregnancy and Medicines

Not all medicines are safe to take when you are pregnant. Some medicines can harm your baby. That includes over-the-counter or prescription drugs, herbs, and supplements. Always speak with your health care provider before you start or stop any medicine. Not using medicine that you need may be more harmful to you and your baby than using the medicine. For example, many pregnant women take prescription medicines for health problems like diabetes, asthma, seizures, and heartburn. The decision about whether or not to take a medicine depends on the risks and benefits. You and your health care provider should make this choice together. Pregnant women should not take regular vitamins. They may have too much or too little of the vitamins that you need. There are special vitamins for pregnant women. It is important to take 0.4 mg of folic acid every day before you become pregnant through the first part of your pregnancy. Folic acid helps to prevent birth defects of the baby's brain or spine. Food and Drug Administration

Pregnancy and Nutrition

When you're pregnant, eating healthy foods is more important than ever. You need more protein, iron, calcium, and folic acid than you did before pregnancy. You also need more calories. But "eating for two" doesn't mean eating twice as much. It means that the foods you eat are the main source of nutrients for your baby. Sensible, balanced meals will be best for you and your baby. You should gain weight gradually during your pregnancy, with most of the weight gained in the last trimester. Generally, doctors suggest women gain weight at the following rate: 2 to 4 pounds total during the first trimester 3 to 4 pounds per month for the second and third trimesters Most women need 300 calories a day or more during at least the last six months of pregnancy than they did before they were pregnant. But not all calories are equal. Your baby needs healthy foods that are packed with nutrients - not "empty calories" such as those found in soft drinks, candies, and desserts. Dept. of Health and Human Services Office on Women's Health

Pregnancy and Substance Abuse

When you are pregnant, you are not just "eating for two." You also breathe and drink for two, so it is important to carefully consider what you give to your baby. If you smoke, use alcohol or take illegal drugs, so does your unborn baby. First, don't smoke. Smoking during pregnancy passes nicotine and cancer-causing drugs to your baby. Smoke also keeps your baby from getting nourishment and raises the risk of stillbirth or premature birth. Don't drink alcohol. There is no known safe amount of alcohol a woman can drink while pregnant. Alcohol can cause life-long physical and behavioral problems in children, including fetal alcohol syndrome. Don't use illegal drugs. Using illegal drugs may cause underweight babies, birth defects or withdrawal symptoms after birth. If you are pregnant and you smoke, drink alcohol or do drugs, get help. Your health care provider can recommend programs to help you quit. You and your baby will be better off. Dept. of Health and Human Services Office on Women's Health

Pregnancy Hazards see Reproductive Hazards

Both the male and female reproductive systems play a role in pregnancy. Problems with these systems can affect fertility and the ability to have children. Something that affects reproductive health is called a reproductive hazard. Examples include: Radiation Metals such as lead and mercury Chemicals such as pesticides Cigarettes Some viruses Alcohol For men, a reproductive hazard can affect the sperm. For a woman, a reproductive hazard can cause different effects during pregnancy, depending on when she is exposed. During the first 3 months of pregnancy, it might cause a birth defect or a miscarriage. During the last 6 months of pregnancy, it could slow the growth of the fetus, affect the development of its brain, or cause premature labor.

Pregnancy Loss see Miscarriage; Stillbirth

A miscarriage is an unexpected loss of pregnancy before the 20th week of pregnancy. Most miscarriages happen very early in the pregnancy, often before a woman even knows she is pregnant. Factors that may contribute to miscarriage include A genetic problem with the fetus Problems with the uterus or cervix Chronic diseases, such as polycystic ovary syndrome Signs of a miscarriage include vaginal spotting, abdominal pain or cramping, and fluid or tissue passing from the vagina. Bleeding can be a symptom of miscarriage, but many women also have it in early pregnancy and don't miscarry. To be sure, contact your health care provider right away if you have bleeding. Women who miscarry early in their pregnancy usually do not need any treatment. In some cases, there is tissue left in the uterus. Doctors use a procedure called a dilatation and curettage (D&C) or medicines to remove the tissue. Counseling may help you cope with your grief. Later, if you do decide to try again, work closely with your health care provider to lower the risks. Many women who have a miscarriage go on to have healthy babies. NIH: National Institute of Child Health and Human Development

Pregnancy, High-Risk see Health Problems in Pregnancy

Every pregnancy has some risk of problems. The causes can be conditions you already have or conditions you develop. They also include being pregnant with more than one baby, previous problem pregnancies, or being over age 35. They can affect your health and the health of your baby. If you have a chronic condition, you should talk to your health care provider about how to minimize your risk before you get pregnant. Once you are pregnant, you may need a health care team to monitor your pregnancy. Examples of common conditions that can complicate a pregnancy include Heart disease High blood pressure Kidney problems Autoimmune disorders Sexually transmitted diseases Diabetes Cancer Infections Other conditions that can make pregnancy risky can happen while you are pregnant - for example, gestational diabetes and Rh incompatibility. Good prenatal care can help detect and treat them. Some discomforts, like nausea, back pain, and fatigue, are common during pregnancy. Sometimes it is hard to know what is normal. Call your doctor or midwife if something is bothering or worrying you.

Pregnancy, Infections in see Infections and Pregnancy

If you are pregnant, an infection can be more than just a problem for you. Some infections can be dangerous to your baby. You can help yourself avoid infections: Don't eat raw or undercooked meat Don't share food or drinks with other people Wash your hands frequently Don't empty cat litter. Cats can transmit toxoplasmosis. You may need to take medicines or get a vaccine to prevent an infection in your baby. For example, you may need to take antibiotics if you develop an infection with group B strep, or take medicines if you have genital herpes. Only some medicines and vaccines are safe during pregnancy. Ask your health care provider about how best to protect you and your baby.

Pregnancy, Teen see Teenage Pregnancy

Most teenage girls don't plan to get pregnant, but many do. Teen pregnancies carry extra health risks to both the mother and the baby. Often, teens don't get prenatal care soon enough, which can lead to problems later on. They have a higher risk for pregnancy-related high blood pressure and its complications. Risks for the baby include premature birth and a low birth weight. If you're a pregnant teen, you can help yourself and your baby by Getting regular prenatal care Taking your prenatal vitamins for your health and to prevent some birth defects Avoiding smoking, alcohol, and drugs Using a condom, if you are having sex, to prevent sexually transmitted diseases that could hurt your baby

Premature Babies

Almost 1 of every 10 infants born in the United States are premature, or preemies. A premature birth is when a baby is born before 37 completed weeks of pregnancy. A full-term pregnancy is 40 weeks. Important growth and development happen throughout pregnancy - especially in the final months and weeks. Because they are born too early, preemies weigh much less than full-term babies. They may have health problems because their organs did not have enough time to develop. Problems that a baby born too early may have include Breathing problems Feeding difficulties Cerebral palsy Developmental delay Vision problems Hearing problems Preemies need special medical care in a neonatal intensive care unit, or NICU. They stay there until their organ systems can work on their own. Centers for Disease Control and Prevention

Premature Birth see Preterm Labor

Preterm labor is labor that starts before 37 completed weeks of pregnancy. It can lead to premature birth. Premature babies may face serious health risks. Symptoms of preterm labor include Contractions every 10 minutes or more often Leaking fluid or bleeding from the vagina Feeling of pressure in the pelvis Low, dull backache Cramps that feel like menstrual cramps Abdominal cramps with or without diarrhea If you think you might be having preterm labor, contact your health care provider. NIH: National Institute of Child Health and Human Development

Premature Ejaculation see Sexual Problems in Men

Many men have sexual problems. They become more common as men age. Problems can include Erectile dysfunction Reduced or lost interest in sex Problems with ejaculation Low testosterone Stress, illness, medicines, or emotional problems may also be factors. Occasional problems with sexual function are common. If problems last more than a few months or cause distress for you or your partner, you should see your health care provider.

Premature Labor see Childbirth Problems; Preterm Labor

While childbirth usually goes well, complications can happen. They can cause a risk to the mother, baby, or both. Possible complications include Preterm (premature) labor, when labor starts before 37 completed weeks of pregnancy Problems with the umbilical cord Problems with the position of the baby, such as breech, in which the baby is going to come out feet first Birth injuries For some of these problems, the baby may need to be delivered surgically by a Cesarean section.

Premature Menopause see Menopause

Menopause is the time in a woman's life when her period stops. It usually occurs naturally, most often after age 45. Menopause happens because the woman's ovaries stop producing the hormones estrogen and progesterone. A woman has reached menopause when she has not had a period for one year. Changes and symptoms can start several years earlier. They include A change in periods - shorter or longer, lighter or heavier, with more or less time in between Hot flashes and/or night sweats Trouble sleeping Vaginal dryness Mood swings Trouble focusing Less hair on head, more on face Some symptoms require treatment. Talk to your doctor about how to best manage menopause. Make sure the doctor knows your medical history and your family medical history. This includes whether you are at risk for heart disease, osteoporosis, or breast cancer. Dept. of Health and Human Services Office on Women's Health

Premature Ovarian Failure

Premature ovarian failure (POF) is when a woman's ovaries stop working before she is 40. POF is different from premature menopause. With premature menopause, your periods stop before age 40. You can no longer get pregnant. The cause can be natural or it can be a disease, surgery, chemotherapy, or radiation. With POF, some women still have occasional periods. They may even get pregnant. In most cases of POF, the cause is unknown. Missed periods are usually the first sign of POF. Later symptoms may be similar to those of natural menopause: Hot flashes Night sweats Irritability Poor concentration Decreased sex drive Pain during sex Vaginal dryness Doctors diagnose POF by doing a physical exam and lab and imaging tests. Most women with POF cannot get pregnant naturally. Fertility treatments help a few women; others use donor eggs to have children. There is no treatment that will restore normal ovarian function. However, many health care providers suggest taking hormones until age 50. NIH: National Institute of Child Health and Human Development

Premenstrual Syndrome

Premenstrual syndrome, or PMS, is a group of symptoms that start one to two weeks before your period. Most women have at least some symptoms of PMS, and the symptoms go away after their periods start. For some women, the symptoms are severe enough to interfere with their lives. They have a type of PMS called premenstrual dysphoric disorder, or PMDD. Common PMS symptoms include Breast swelling and tenderness Acne Bloating and weight gain Pain - headache or joint pain Food cravings Irritability, mood swings, crying spells, depression No one knows what causes PMS, but hormonal changes trigger the symptoms. No single PMS treatment works for everyone. Over-the-counter pain relievers such as ibuprofen, aspirin or naproxen may help ease cramps, headaches, backaches and breast tenderness. Exercising, getting enough sleep, and avoiding salt, caffeine, and alcohol can also help. Dept. of Health and Human Services Office on Women's Health

Prenatal Care

Prenatal care is the health care you get while you are pregnant. It includes your checkups and prenatal testing. Prenatal care can help keep you and your baby healthy. It lets your health care provider spot health problems early. Early treatment can cure many problems and prevent others. Your doctor or midwife will give you a schedule for your prenatal visits. If you are over 35 years old or your pregnancy is high risk because of health problems like diabetes or high blood pressure, your doctor or midwife will probably want to see you more often. You can also expect to see your health care provider more often as your due date gets closer. Dept. of Health and Human Services Office on Women's Health

Prenatal Testing

Prenatal testing provides information about your baby's health before he or she is born. Some routine tests during pregnancy also check on your health. At your first prenatal visit, your healthcare provider will test for a number of things, including problems with your blood, signs of infections, and whether you are immune to rubella (German measles) and chickenpox. Throughout your pregnancy, your healthcare provider may suggest a number of other tests, too. Some tests are suggested for all women, such as screenings for gestational diabetes, Down syndrome, and HIV. Other tests might be offered based on your: Age Personal or family health history Ethnic background Results of routine tests Some tests are screening tests. They detect risks for or signs of possible health problems in you or your baby. Based on screening test results, your doctor might suggest diagnostic tests. Diagnostic tests confirm or rule out health problems in you or your baby. Dept. of Health and Human Services Office on Women's Health

PrEP (Pre-Exposure Prophylaxis) see HIV/AIDS Medicines

In the early 1980s, when the HIV/AIDS epidemic began, patients rarely lived longer than a few years. But today, there are many effective medicines to fight the infection, and people with HIV have longer, healthier lives. There are five major types of medicines: Reverse transcriptase (RT) inhibitors - interfere with a critical step during the HIV life cycle and keep the virus from making copies of itself Protease inhibitors - interfere with a protein that HIV uses to make infectious viral particles Fusion inhibitors - block the virus from entering the body's cells Integrase inhibitors - block an enzyme HIV needs to make copies of itself Multidrug combinations - combine two or more different types of drugs into one These medicines help people with HIV, but they are not perfect. They do not cure HIV/AIDS. People with HIV infection still have the virus in their bodies. They can still spread HIV to others through unprotected sex and needle sharing, even when they are taking their medicines. NIH: National Institute of Allergy and Infectious Diseases

Presbycusis see Hearing Disorders and Deafness

It's frustrating to be unable to hear well enough to enjoy talking with friends or family. Hearing disorders make it hard, but not impossible, to hear. They can often be helped. Deafness can keep you from hearing sound at all. What causes hearing loss? Some possibilities are Heredity Diseases such as ear infections and meningitis Trauma Certain medicines Long-term exposure to loud noise Aging There are two main types of hearing loss. One happens when your inner ear or auditory nerve is damaged. This type is usually permanent. The other kind happens when sound waves cannot reach your inner ear. Earwax build-up, fluid, or a punctured eardrum can cause it. Treatment or surgery can often reverse this kind of hearing loss. Untreated, hearing problems can get worse. If you have trouble hearing, you can get help. Possible treatments include hearing aids, cochlear implants, special training, certain medicines, and surgery. NIH: National Institute on Deafness and Other Communication Disorders

Presbyopia see Refractive Errors

The cornea and lens of your eye helps you focus. Refractive errors are vision problems that happen when the shape of the eye keeps you from focusing well. The cause could be the length of the eyeball (longer or shorter), changes in the shape of the cornea, or aging of the lens. Four common refractive errors are Myopia, or nearsightedness - clear vision close up but blurry in the distance Hyperopia, or farsightedness - clear vision in the distance but blurry close up Presbyopia - inability to focus close up as a result of aging Astigmatism - focus problems caused by the cornea The most common symptom is blurred vision. Other symptoms may include double vision, haziness, glare or halos around bright lights, squinting, headaches, or eye strain. Glasses or contact lenses can usually correct refractive errors. Laser eye surgery may also be a possibility. NIH: National Eye Institute

Prescription Drug Abuse

If you take a medicine in a way that is different from what the doctor prescribed, it is called prescription drug abuse. It could be Taking a medicine that was prescribed for someone else Taking a larger dose than you are supposed to Taking the medicine in a different way than you are supposed to. This might be crushing tablets and then snorting or injecting them. Using the medicine for another purpose, such as getting high Abusing some prescription drugs can lead to addiction. These include opioids, sedatives, tranquilizers, and stimulants. Every medicine has some risk of side effects. Doctors take this into account when prescribing medicines. People who abuse these drugs may not understand the risks. The medicines may not be safe for them, especially at higher doses or when taken with other medicines. NIH: National Institute on Drug Abuse

Pressure Sores

Pressure sores are areas of damaged skin caused by staying in one position for too long. They commonly form where your bones are close to your skin, such as your ankles, back, elbows, heels and hips. You are at risk if you are bedridden, use a wheelchair, or are unable to change your position. Pressure sores can cause serious infections, some of which are life-threatening. They can be a problem for people in nursing homes. You can prevent the sores by Keeping skin clean and dry Changing position every two hours Using pillows and products that relieve pressure Pressure sores have a variety of treatments. Advanced sores are slow to heal, so early treatment is best.

Preterm Labor

Preterm labor is labor that starts before 37 completed weeks of pregnancy. It can lead to premature birth. Premature babies may face serious health risks. Symptoms of preterm labor include Contractions every 10 minutes or more often Leaking fluid or bleeding from the vagina Feeling of pressure in the pelvis Low, dull backache Cramps that feel like menstrual cramps Abdominal cramps with or without diarrhea If you think you might be having preterm labor, contact your health care provider. NIH: National Institute of Child Health and Human Development

Prevention see Healthy Living

Many factors affect your health. Some you cannot control, such as your genetic makeup or your age. But you can make changes to your lifestyle. By taking steps toward healthy living, you can help reduce your risk of heart disease, cancer, stroke and other serious diseases: Get the screening tests you need Maintain a healthy weight Eat a variety of healthy foods, and limit calories and saturated fat Be physically active Control your blood pressure and cholesterol Don't smoke Protect yourself from too much sun Drink alcohol in moderation, or don't drink at all Agency for Healthcare Research and Quality

Primary Pulmonary Hypertension see Pulmonary Hypertension

Pulmonary hypertension (PH) is high blood pressure in the arteries to your lungs. It is a serious condition. If you have it, the blood vessels that carry blood from your heart to your lungs become hard and narrow. Your heart has to work harder to pump the blood through. Over time, your heart weakens and cannot do its job and you can develop heart failure. Symptoms of PH include Shortness of breath during routine activity, such as climbing two flights of stairs Tiredness Chest pain A racing heartbeat Pain on the upper right side of the abdomen Decreased appetite As PH worsens, you may find it hard to do any physical activities. There are two main kinds of PH. One runs in families or appears for no known reason. The other kind is related to another condition, usually heart or lung disease. There is no cure for PH. Treatments can control symptoms. They involve treating the heart or lung disease, medicines, oxygen, and sometimes lung transplantation. NIH: National Heart, Lung, and Blood Institute

Prion Diseases see Creutzfeldt-Jakob Disease; Degenerative Nerve Diseases

Creutzfeldt-Jakob disease (CJD) is a rare, degenerative brain disorder. Symptoms usually start around age 60. Memory problems, behavior changes, vision problems, and poor muscle coordination progress quickly to dementia, coma, and death. Most patients die within a year. The three main categories of CJD are Sporadic CJD, which occurs for no known reason Hereditary CJD, which runs in families Acquired CJD, which occurs from contact with infected tissue, usually during a medical procedure Cattle can get a disease related to CJD called bovine spongiform encephalopathy (BSE) or "mad cow disease." There is concern that people can get a variant of CJD from eating beef from an infected animal, but there is no direct proof to support this. NIH: National Institute of Neurological Disorders and Stroke

Privacy see Patient Rights; Personal Health Records

As a patient, you have certain rights. Some are guaranteed by federal law, such as the right to get a copy of your medical records, and the right to keep them private. Many states have additional laws protecting patients, and healthcare facilities often have a patient bill of rights. An important patient right is informed consent. This means that if you need a treatment, your health care provider must give you the information you need to make a decision. Many hospitals have patient advocates who can help you if you have problems. Many states have an ombudsman office for problems with long term care. Your state's department of health may also be able to help.

PRK see Laser Eye Surgery

For many people, laser eye surgery can correct their vision so they no longer need glasses or contact lenses. Laser eye surgery reshapes the cornea, the clear front part of the eye. This changes its focusing power. There are different types of laser eye surgery. LASIK - laser-assisted in situ keratomileusis - is one of the most common. Many patients who have LASIK end up with 20/20 vision. But, like all medical procedures, it has both risks and benefits. Only your eye doctor can tell if you are a good candidate for laser eye surgery.

Proctitis see Rectal Disorders

The rectum is the lower part of your large intestine where your body stores stool. Problems with rectum are common. They include hemorrhoids, abscesses, incontinence and cancer. Many people are embarrassed to talk about rectal troubles. But seeing your doctor about problems in this area is important. This is especially true if you have pain or bleeding. Treatments vary depending on the particular problem. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Progeria see Genetic Disorders

Genes are the building blocks of heredity. They are passed from parent to child. They hold DNA, the instructions for making proteins. Proteins do most of the work in cells. They move molecules from one place to another, build structures, break down toxins, and do many other maintenance jobs. Sometimes there is a mutation, a change in a gene or genes. The mutation changes the gene's instructions for making a protein, so the protein does not work properly or is missing entirely. This can cause a medical condition called a genetic disorder. You can inherit a gene mutation from one or both parents. A mutation can also happen during your lifetime. There are three types of genetic disorders: Single-gene disorders, where a mutation affects one gene. Sickle cell anemia is an example. Chromosomal disorders, where chromosomes (or parts of chromosomes) are missing or changed. Chromosomes are the structures that hold our genes. Down syndrome is a chromosomal disorder. Complex disorders, where there are mutations in two or more genes. Often your lifestyle and environment also play a role. Colon cancer is an example. Genetic tests on blood and other tissue can identify genetic disorders. NIH: National Library of Medicine

Progressive Supranuclear Palsy

Progressive supranuclear palsy (PSP) is a rare brain disease. It affects brain cells that control the movement of your eyes. This leads to serious and permanent problems with balance and the way you walk. It usually occurs in middle-aged or elderly people. Symptoms are very different in each person, but may include personality changes, speech, vision and swallowing problems. Doctors sometimes confuse PSP with Parkinson's disease or Alzheimer's disease. PSP has no cure and no effective treatments. Walking aids, special glasses and certain medicines might help somewhat. Although the disease gets worse over time, it isn't fatal on its own. However, PSP is dangerous because it increases your risk of pneumonia and choking from swallowing problems and injuries from falling. NIH: National Institute of Neurological Disorders and Stroke

Prolactinoma see Pituitary Tumors

Your pituitary gland is a pea-sized gland at the base of your brain. The pituitary is the "master control gland" - it makes hormones that affect growth and the functions of other glands in the body. Pituitary tumors are common, but often they don't cause health problems. Most people with pituitary tumors never even know they have them. The most common type of pituitary tumor produces hormones and disrupts the balance of hormones in your body. This can cause endocrine diseases such as Cushing's syndrome and hyperthyroidism. Symptoms of pituitary tumors include Headaches Vision problems Nausea and vomiting Problems caused by the production of too many hormones Pituitary tumors are usually curable. Treatment is often surgery to remove the tumor. Other options include medicines, radiation therapy, and chemotherapy.

Prostate Cancer

The prostate is the gland below a man's bladder that produces fluid for semen. Prostate cancer is common among older men. It is rare in men younger than 40. Risk factors for developing prostate cancer include being over 65 years of age, family history, and being African-American. Symptoms of prostate cancer may include Problems passing urine, such as pain, difficulty starting or stopping the stream, or dribbling Low back pain Pain with ejaculation To diagnose prostate cancer, you doctor may do a digital rectal exam to feel the prostate for lumps or anything unusual. You may also get a blood test for prostate-specific antigen (PSA). These tests are also used in prostate cancer screening, which looks for cancer before you have symptoms. If your results are abnormal, you may need more tests, such as an ultrasound, MRI, or biopsy. Treatment often depends on the stage of the cancer. How fast the cancer grows and how different it is from surrounding tissue helps determine the stage. Men with prostate cancer have many treatment options. The treatment that's best for one man may not be best for another. The options include watchful waiting, surgery, radiation therapy, hormone therapy, and chemotherapy. You may have a combination of treatments. NIH: National Cancer Institute

Prostate Cancer Screening

The prostate is the gland below a man's bladder that produces fluid for semen. Cancer screening is looking for cancer before you have any symptoms. Cancer found early may be easier to treat. There is no standard screening test for prostate cancer. Researchers are studying different tests to find those with the fewest risks and most benefits. One test is the digital rectal exam (DRE). The doctor or nurse inserts a lubricated, gloved finger into your rectum to feel the prostate for lumps or anything unusual. Another test is the prostate-specific antigen (PSA) blood test. Your PSA level may be high if you have prostate cancer. It can also be high if you have an enlarged prostate (BPH) or other prostate problems. If your screening results are abnormal, your doctor may do more tests, such as an ultrasound, MRI, or a biopsy. Prostate cancer screening has risks: Finding prostate cancer may not improve your health or help you live longer The results can sometimes be wrong Follow-up tests, such as a biopsy, may have complications You and your doctor should discuss your risk for prostate cancer, the pros and cons of the screening tests, and whether you should get them.

Prostate Diseases

The prostate is a gland in men. It helps make semen, the fluid that contains sperm. The prostate surrounds the tube that carries urine away from the bladder and out of the body. A young man's prostate is about the size of a walnut. It slowly grows larger with age. If it gets too large, it can cause problems. This is very common after age 50. The older men get, the more likely they are to have prostate trouble. Some common problems are Prostatitis - inflammation, usually caused by bacteria Enlarged prostate (BPH), or benign prostatic hyperplasia - a common problem in older men which may cause dribbling after urination or a need to go often, especially at night Prostate cancer - a common cancer that responds best to treatment when detected early NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Prosthetic Limbs see Artificial Limbs

People can lose all or part of an arm or leg for a number of reasons. Common ones include Circulation problems from atherosclerosis or diabetes. They may cause you to need an amputation. Traumatic injuries, including from traffic accidents and military combat Cancer Birth defects If you are missing an arm or leg, an artificial limb can sometimes replace it. The device, which is called a prosthesis, can help you to perform daily activities such as walking, eating, or dressing. Some artificial limbs let you function nearly as well as before.

Protective Eye Wear see Eye Injuries; Eye Wear

The structure of your face helps protect your eyes from injury. Still, injuries can damage your eye, sometimes severely enough that you could lose your vision. Most eye injuries are preventable. If you play sports or work in certain jobs, you may need protection. The most common type of injury happens when something irritates the outer surface of your eye. Certain jobs such as industrial jobs or hobbies such as carpentry make this type of injury more likely. It's also more likely if you wear contact lenses. Chemicals or heat can burn your eyes. With chemicals, the pain may cause you to close your eyes. This traps the irritant next to the eye and may cause more damage. You should wash out your eye right away while you wait for medical help.

Proteins see Dietary Proteins

Protein is in every cell in the body. Our bodies need protein from the foods we eat to build and maintain bones, muscles and skin. We get proteins in our diet from meat, dairy products, nuts, and certain grains and beans. Proteins from meat and other animal products are complete proteins. This means they supply all of the amino acids the body can't make on its own. Most plant proteins are incomplete. You should eat different types of plant proteins every day to get all of the amino acids your body needs. It is important to get enough dietary protein. You need to eat protein every day, because your body doesn't store it the way it stores fats or carbohydrates. How much you need depends on your age, sex, health, and level of physical activity. Most Americans eat enough protein in their diet.

Proteinuria see Urinalysis

A urinalysis is a test of your urine. It is often done to check for a urinary tract infections, kidney problems, or diabetes. You may also have one during a checkup, if you are admitted to the hospital, before you have surgery, or if you are pregnant. It can also monitor some medical conditions and treatments. A urinalysis involves checking the urine for Its color Its appearance (whether it is clear or cloudy) Any odor The pH level (acidity) Whether there are substances that are not normally in urine, such as blood, too much protein, glucose, ketones, and bilirubin Whether there are cells, crystals, and casts (tube-shaped proteins) Whether it contains bacteria or other germs

Pruritus see Itching

Itching is skin tingling or irritation that makes you want to scratch the itchy area. It's a symptom of many health conditions. Common causes are Allergic reactions Eczema Dry skin Insect bites and stings Irritating chemicals Parasites such as pinworms, scabies, head and body lice Pregnancy Rashes Reactions to medicines To soothe itchy skin, you can try cold compresses, lotions and lukewarm baths. Avoid scratching, wearing irritating fabrics and high heat and humidity. Most itching is not serious. However, if you itch all over, have hives that keep coming back or have itching without an apparent cause, you might require medical attention.

Pruritus Ani see Anal Disorders

The anus is the opening of the rectum through which stool passes out of your body. Problems with the anus are common. They include hemorrhoids, abscesses, fissures (cracks), and cancer. You may be embarrassed to talk about your anal troubles. But it is important to let your doctor know, especially if you have pain or bleeding. The more details you can give about your problem, the better your doctor will be able to help you. Treatments vary depending on the particular problem. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Pseudogout see Gout

Gout is a common, painful form of arthritis. It causes swollen, red, hot and stiff joints. Gout happens when uric acid builds up in your body. Uric acid comes from the breakdown of substances called purines. Purines are in your body's tissues and in foods, such as liver, dried beans and peas, and anchovies. Normally, uric acid dissolves in the blood. It passes through the kidneys and out of the body in urine. But sometimes uric acid can build up and form needle-like crystals. When they form in your joints, it is very painful. The crystals can also cause kidney stones. Often, gout first attacks your big toe. It can also attack ankles, heels, knees, wrists, fingers, and elbows. At first, gout attacks usually get better in days. Eventually, attacks last longer and happen more often. You are more likely to get gout if you Are a man Have family member with gout Are overweight Drink alcohol Eat too many foods rich in purines Gout can be hard to diagnose. Your doctor may take a sample of fluid from an inflamed joint to look for crystals. You can treat gout with medicines. Pseudogout has similar symptoms and is sometimes confused with gout. However, it is caused by calcium phosphate, not uric acid. NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Psoriasis

Psoriasis is a skin disease that causes itchy or sore patches of thick, red skin with silvery scales. You usually get the patches on your elbows, knees, scalp, back, face, palms and feet, but they can show up on other parts of your body. Some people who have psoriasis also get a form of arthritis called psoriatic arthritis. A problem with your immune system causes psoriasis. In a process called cell turnover, skin cells that grow deep in your skin rise to the surface. Normally, this takes a month. In psoriasis, it happens in just days because your cells rise too fast. Psoriasis can be hard to diagnose because it can look like other skin diseases. Your doctor might need to look at a small skin sample under a microscope. Psoriasis can last a long time, even a lifetime. Symptoms come and go. Things that make them worse include Infections Stress Dry skin Certain medicines Psoriasis usually occurs in adults. It sometimes runs in families. Treatments include creams, medicines, and light therapy. NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Psoriatic Arthritis

Psoriasis is a skin disease that causes itchy or sore patches of thick, red skin with silvery scales. You usually get them on your elbows, knees, scalp, back, face, palms and feet, but they can show up on other parts of your body. Some people with psoriasis have psoriatic arthritis. It causes pain, stiffness, and swelling of the joints. It is often mild, but can sometimes be serious and affect many joints. The joint and skin problems don't always happen at the same time. Your doctor will do a physical exam and imaging tests to diagnose psoriatic arthritis. There is no cure, but medicines can help control inflammation and pain. In rare cases, you might need surgery to repair or replace damaged joints.

Psychiatric Disorders see Mental Disorders

Mental disorders include a wide range of problems, including Anxiety disorders, including panic disorder, obsessive-compulsive disorder, post-traumatic stress disorder, and phobias Bipolar disorder Depression Mood disorders Personality disorders Psychotic disorders, including schizophrenia There are many causes of mental disorders. Your genes and family history may play a role. Your life experiences, such as stress or a history of abuse, may also matter. Biological factors can also be part of the cause. A traumatic brain injury can lead to a mental disorder. A mother's exposure to viruses or toxic chemicals while pregnant may play a part. Other factors may increase your risk, such as use of illegal drugs or having a serious medical condition like cancer. Medications and counseling can help many mental disorders.

Psychological Stress see Stress

Everyone feels stressed from time to time. Not all stress is bad. All animals have a stress response, and it can be life-saving. But chronic stress can cause both physical and mental harm. There are at least three different types of stress: Routine stress related to the pressures of work, family, and other daily responsibilities Stress brought about by a sudden negative change, such as losing a job, divorce, or illness Traumatic stress, which happens when you are in danger of being seriously hurt or killed. Examples include a major accident, war, assault, or a natural disaster. This type of stress can cause post-traumatic stress disorder (PTSD). Different people may feel stress in different ways. Some people experience digestive symptoms. Others may have headaches, sleeplessness, depressed mood, anger, and irritability. People under chronic stress get more frequent and severe viral infections, such as the flu or common cold. Vaccines, such as the flu shot, are less effective for them. Some people cope with stress more effectively than others. It's important to know your limits when it comes to stress, so you can avoid more serious health effects. NIH: National Institute of Mental Health

Psychotic Disorders

Psychotic disorders are severe mental disorders that cause abnormal thinking and perceptions. People with psychoses lose touch with reality. Two of the main symptoms are delusions and hallucinations. Delusions are false beliefs, such as thinking that someone is plotting against you or that the TV is sending you secret messages. Hallucinations are false perceptions, such as hearing, seeing, or feeling something that is not there. Schizophrenia is one type of psychotic disorder. People with bipolar disorder may also have psychotic symptoms. Other problems that can cause psychosis include alcohol and some drugs, brain tumors, brain infections, and stroke. Treatment depends on the cause of the psychosis. It might involve drugs to control symptoms and talk therapy. Hospitalization is an option for serious cases where a person might be dangerous to himself or others.

Ptosis see Eyelid Disorders

Your eyelids help protect your eyes. When you blink, your eyelids spread moisture over your eyes. Blinking also helps move dirt or other particles off the surface of the eye. You close your eyelids when you see something coming toward your eyes. This can help protect against injuries. Like most other parts of your body, your eyelids can get infected, inflamed, or even develop cancer. There are also specific eyelid problems, including Eyelids that turn in or out Eyelids that droop Abnormal blinking or twitching Treatment of eyelid problems depends on the cause.

PTSD see Post-Traumatic Stress Disorder

Post-traumatic stress disorder (PTSD) is a real illness. You can get PTSD after living through or seeing a traumatic event, such as war, a hurricane, sexual assault, physical abuse, or a bad accident. PTSD makes you feel stressed and afraid after the danger is over. It affects your life and the people around you. PTSD can cause problems like Flashbacks, or feeling like the event is happening again Trouble sleeping or nightmares Feeling alone Angry outbursts Feeling worried, guilty, or sad PTSD starts at different times for different people. Signs of PTSD may start soon after a frightening event and then continue. Other people develop new or more severe signs months or even years later. PTSD can happen to anyone, even children. Treatment may include talk therapy, medicines, or both. Treatment might take 6 to 12 weeks. For some people, it takes longer. NIH: National Institute of Mental Health

Puberty

Puberty is the time in life when a boy or girl becomes sexually mature. It is a process that usually happens between ages 10 and 14 for girls and ages 12 and 16 for boys. It causes physical changes, and affects boys and girls differently. In girls: The first sign of puberty is usually breast development. Then hair grows in the pubic area and armpits. Menstruation (or a period) usually happens last. In boys: Puberty usually begins with the testicles and penis getting bigger. Then hair grows in the pubic area and armpits. Muscles grow, the voice deepens, and facial hair develops as puberty continues. Both boys and girls may get acne. They also usually have a growth spurt (a rapid increase in height) that lasts for about 2 or 3 years. This brings them closer to their adult height, which they reach after puberty. NIH: National Institute of Child Health and Human Development

Pulmonary Embolism

A pulmonary embolism is a sudden blockage in a lung artery. The cause is usually a blood clot in the leg called a deep vein thrombosis that breaks loose and travels through the bloodstream to the lung. Pulmonary embolism is a serious condition that can cause Permanent damage to the affected lung Low oxygen levels in your blood Damage to other organs in your body from not getting enough oxygen If a clot is large, or if there are many clots, pulmonary embolism can cause death. Half the people who have pulmonary embolism have no symptoms. If you do have symptoms, they can include shortness of breath, chest pain or coughing up blood. Symptoms of a blood clot include warmth, swelling, pain, tenderness and redness of the leg. The goal of treatment is to break up clots and help keep other clots from forming. NIH: National Heart, Lung, and Blood Institute

Pulmonary Emphysema see Emphysema

Emphysema is a type of COPD involving damage to the air sacs (alveoli) in the lungs. As a result, your body does not get the oxygen it needs. Emphysema makes it hard to catch your breath. You may also have a chronic cough and have trouble breathing during exercise. The most common cause is cigarette smoking. If you smoke, quitting can help prevent you from getting the disease. If you already have emphysema, not smoking might keep it from getting worse. Treatment is based on whether your symptoms are mild, moderate or severe. Treatments include inhalers, oxygen, medications and sometimes surgery to relieve symptoms and prevent complications.

Pulmonary Fibrosis

Pulmonary fibrosis is a condition in which the tissue deep in your lungs becomes scarred over time. This tissue gets thick and stiff. That makes it hard for you to catch your breath, and your blood may not get enough oxygen. Causes of pulmonary fibrosis include environmental pollutants, some medicines, some connective tissue diseases, and interstitial lung disease. Interstitial lung disease is the name for a large group of diseases that inflame or scar the lungs. In most cases, the cause cannot be found. This is called idiopathic pulmonary fibrosis. Symptoms include Shortness of breath A dry, hacking cough that doesn't get better Fatigue Weight loss for no known reason Aching muscles and joints Clubbing, which is the widening and rounding of the tips of the fingers or toes Your doctor may use your medical history, imaging tests, a biopsy, and lung function tests to diagnose pulmonary fibrosis. There is no cure. Treatments can help with symptoms and improve your quality of life. They include medicines, oxygen therapy, pulmonary rehabilitation, or a lung transplant. NIH: National Heart, Lung, and Blood Institute

Pulmonary Hypertension

Pulmonary hypertension (PH) is high blood pressure in the arteries to your lungs. It is a serious condition. If you have it, the blood vessels that carry blood from your heart to your lungs become hard and narrow. Your heart has to work harder to pump the blood through. Over time, your heart weakens and cannot do its job and you can develop heart failure. Symptoms of PH include Shortness of breath during routine activity, such as climbing two flights of stairs Tiredness Chest pain A racing heartbeat Pain on the upper right side of the abdomen Decreased appetite As PH worsens, you may find it hard to do any physical activities. There are two main kinds of PH. One runs in families or appears for no known reason. The other kind is related to another condition, usually heart or lung disease. There is no cure for PH. Treatments can control symptoms. They involve treating the heart or lung disease, medicines, oxygen, and sometimes lung transplantation. NIH: National Heart, Lung, and Blood Institute

Pulmonary Rehabilitation

Pulmonary rehabilitation (rehab) is a medically supervised program to help people who have chronic breathing problems, including COPD (chronic obstructive pulmonary disease) Sarcoidosis Idiopathic pulmonary fibrosis Cystic fibrosis During pulmonary rehab you may do exercise training and learn breathing techniques. You'll also get tips on conserving your energy and advice on nutrition and coping. These can't cure your lung disease or completely ease your breathing problems. But it can help you function better in your daily life. NIH: National Heart, Lung, and Blood Institute

Pulse see Vital Signs

Your vital signs show how well your body is functioning. They are usually measured at doctor's offices, often as part of a health checkup, or during an emergency room visit. They include Blood pressure, which measures the force of your blood pushing against the walls of your arteries. Blood pressure that is too high or too low can cause problems. Your blood pressure has two numbers. The first number is the pressure when your heart beats and is pumping the blood. The second is from when your heart is at rest, between beats. A normal blood pressure reading for adults is lower than 120/80 and higher than 90/60. Heart rate, or pulse, which measures how fast your heart is beating. A problem with your heart rate may be an arrhythmia. Your normal heart rate depends on factors such as your age, how much you exercise, whether you are sitting or standing, which medicines you take, and your weight. Respiratory rate, which measures your breathing. Mild breathing changes can be from causes such as a stuffy nose or hard exercise. But slow or fast breathing can also be a sign of a serious breathing problem. Temperature, which measures how hot your body is. A body temperature that is higher than normal (over 98.6 degrees F) is called a fever.

PXE see Connective Tissue Disorders

Connective tissue is the material inside your body that supports many of its parts. It is the "cellular glue" that gives your tissues their shape and helps keep them strong. It also helps some of your tissues do their work. Cartilage and fat are examples of connective tissue. There are over 200 disorders that impact connective tissue. Some, like cellulitis, are the result of an infection. Injuries can cause connective tissue disorders, such as scars. Others, such as Ehlers-Danlos syndrome, Marfan syndrome, and osteogenesis imperfecta, are genetic. Still others, like scleroderma, have no known cause. Each disorder has its own symptoms and needs different treatment.

Pyelonephritis see Urinary Tract Infections

The urinary system is the body's drainage system for removing wastes and extra water. It includes two kidneys, two ureters, a bladder, and a urethra. Urinary tract infections (UTIs) are the second most common type of infection in the body. You may have a UTI if you notice Pain or burning when you urinate Fever, tiredness, or shakiness An urge to urinate often Pressure in your lower belly Urine that smells bad or looks cloudy or reddish Pain in your back or side below the ribs People of any age or sex can get UTIs. But about four times as many women get UTIs as men. You're also at higher risk if you have diabetes, need a tube to drain your bladder, or have a spinal cord injury. If you think you have a UTI it is important to see your doctor. Your doctor can tell if you have a UTI with a urine test. Treatment is with antibiotics. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Pyrexia see Fever

A fever is a body temperature that is higher than normal. It is not an illness. It is part of your body's defense against infection. Most bacteria and viruses that cause infections do well at the body's normal temperature (98.6 F). A slight fever can make it harder for them to survive. Fever also activates your body's immune system. Infections cause most fevers. There can be many other causes, including Medicines Heat exhaustion Cancers Autoimmune diseases Treatment depends on the cause of your fever. Your health care provider may recommend using over-the-counter medicines such as acetaminophen or ibuprofen to lower a very high fever. Adults can also take aspirin, but children with fevers should not take aspirin. It is also important to drink enough liquids to prevent dehydration.

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