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G6PD Deficiency

Glucose-6-phosphate dehydrogenase (G6PD) deficiency is a genetic disorder that is most common in males. About 1 in 10 African American males in the United States has it. G6PD deficiency mainly affects red blood cells, which carry oxygen from the lungs to tissues throughout the body. The most common medical problem it can cause is hemolytic anemia. That happens when red blood cells are destroyed faster than the body can replace them. If you have G6PD deficiency, you may not have symptoms. Symptoms happen if your red blood cells are exposed to certain chemicals in food or medicine, certain bacterial or viral infections, or stress. They may include Paleness Jaundice Dark urine Fatigue Shortness of breath Enlarged spleen Rapid heart rate A blood test can tell if you have it. Treatments include medicines to treat infection, avoiding substances that cause the problem with red blood cells, and sometimes transfusions. NIH: National Library of Medicine

Gait Abnormalities see Walking Problems

We walk thousands of steps each day. We walk to do our daily activities, get around, and exercise. Having a problem with walking can make daily life more difficult. The pattern of how you walk is called your gait. A variety of problems can cause an abnormal gait and lead to problems with walking. These include: Injuries, diseases, or abnormal development of the muscles or bones of your legs or feet Movement disorders such as Parkinson's disease Diseases such as arthritis or multiple sclerosis Vision or balance problems Treatment of walking problems depends on the cause. Physical therapy, surgery, or mobility aids may help.

Gallbladder Cancer

Your gallbladder is a pear-shaped organ under your liver. It stores bile, a fluid made by your liver to digest fat. As your stomach and intestines digest food, your gallbladder releases bile through a tube called the common bile duct. The duct connects your gallbladder and liver to your small intestine. Cancer of the gallbladder is rare. It is more common in women and Native Americans. Symptoms include Jaundice (yellowing of the skin and whites of the eyes) Pain above the stomach Fever Nausea and vomiting Bloating Lumps in the abdomen It is hard to diagnose gallbladder cancer in its early stages. Sometimes doctors find it when they remove the gallbladder for another reason. But people with gallstones rarely have gallbladder cancer. Because it is often found late, it can be hard to treat gallbladder cancer. Treatment options include surgery, chemotherapy, radiation, or a combination. NIH: National Cancer Institute

Gallbladder Diseases

Your gallbladder is a pear-shaped organ under your liver. It stores bile, a fluid made by your liver to digest fat. As your stomach and intestines digest food, your gallbladder releases bile through a tube called the common bile duct. The duct connects your gallbladder and liver to your small intestine. Your gallbladder is most likely to give you trouble if something blocks the flow of bile through the bile ducts. That is usually a gallstone. Gallstones form when substances in bile harden. Rarely, you can also get cancer in your gallbladder. Many gallbladder problems get better with removal of the gallbladder. Fortunately, you can live without a gallbladder. Bile has other ways of reaching your small intestine.

Gallstones

Your gallbladder is a pear-shaped organ under your liver. It stores bile, a fluid made by your liver to digest fat. As your stomach and intestines digest food, your gallbladder releases bile through a tube called the common bile duct. The duct connects your gallbladder and liver to your small intestine. Your gallbladder is most likely to give you trouble if something blocks the flow of bile through the bile ducts. That is usually a gallstone. Gallstones form when substances in bile harden. Gallstone attacks usually happen after you eat. Signs of a gallstone attack may include nausea, vomiting, or pain in the abdomen, back, or just under the right arm. Gallstones are most common among older adults, women, overweight people, Native Americans and Mexican Americans. Gallstones are often found during imaging tests for other health conditions. If you do not have symptoms, you usually do not need treatment. The most common treatment is removal of the gallbladder. Fortunately, you can live without a gallbladder. Bile has other ways to reach your small intestine. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

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

Gamete Intrafallopian Transfer see Infertility

Infertility means not being able to become pregnant after a year of trying. If a woman can get pregnant but keeps having miscarriages or stillbirths, that's also called infertility. Infertility is fairly common. After one year of having unprotected sex, about 15 percent of couples are unable to get pregnant. About a third of the time, infertility can be traced to the woman. In another third of cases, it is because of the man. The rest of the time, it is because of both partners or no cause can be found. There are treatments that are specifically for men or for women. Some involve both partners. Drugs, assisted reproductive technology, and surgery are common treatments. Happily, many couples treated for infertility go on to have babies. NIH: National Institute of Child Health and Human Development

Ganglion Cyst see Wrist Injuries and Disorders

Your wrist is made up of eight small bones known as carpals. They support a tube that runs through your wrist. That tube, called the carpal tunnel, has tendons and a nerve inside. It is covered by a ligament, which holds it in place. Wrist pain is common. Repetitive motion can damage your wrist. Everyday activities like typing, racquet sports or sewing can cause pain, or even carpal tunnel syndrome. Wrist pain with bruising and swelling can be a sign of injury. The signs of a possible fracture include misshapen joints and inability to move your wrist. Some wrist fractures are a result of osteoporosis. Other common causes of pain are Sprains and strains Tendinitis Arthritis Gout and pseudogout

Gangrene

Gangrene is the death of tissues in your body. It happens when a part of your body loses its blood supply. Gangrene can happen on the surface of the body, such as on the skin, or inside the body, in muscles or organs. Causes include Serious injuries Problems with blood circulation, such as atherosclerosis and peripheral arterial disease Diabetes Skin symptoms may include a blue or black color, pain, numbness, and sores that produce a foul-smelling discharge. If the gangrene is internal, you may run a fever and feel unwell, and the area may be swollen and painful. Gangrene is a serious condition. It needs immediate attention. Treatment includes surgery, antibiotics, and oxygen therapy. In severe cases an amputation may be necessary.

Gas

Everyone has gas. Most people pass gas 13 to 21 times a day. Passing gas through the mouth is called belching or burping. Passing gas through the anus is called flatulence. Most of the time gas does not have an odor. The odor comes from bacteria in the large intestine that release small amounts of gases that contain sulfur. Gas in the digestive tract comes from two sources: air that you swallow and the breakdown of undigested food by bacteria in the large intestine. Certain foods may cause gas. Foods that produce gas in one person may not cause gas in another. You can reduce the amount of gas you have by Drinking lots of water and non-fizzy drinks Eating more slowly so you swallow less air when you eat Avoiding milk products if you have lactose intolerance Medicines can help reduce gas or the pain and bloating caused by gas. If your symptoms still bother you, see your health care provider. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Gas Gangrene see Gangrene

Gangrene is the death of tissues in your body. It happens when a part of your body loses its blood supply. Gangrene can happen on the surface of the body, such as on the skin, or inside the body, in muscles or organs. Causes include Serious injuries Problems with blood circulation, such as atherosclerosis and peripheral arterial disease Diabetes Skin symptoms may include a blue or black color, pain, numbness, and sores that produce a foul-smelling discharge. If the gangrene is internal, you may run a fever and feel unwell, and the area may be swollen and painful. Gangrene is a serious condition. It needs immediate attention. Treatment includes surgery, antibiotics, and oxygen therapy. In severe cases an amputation may be necessary.

Gastric Bypass see Weight Loss Surgery

Weight loss surgery helps people with extreme obesity to lose weight. It may be an option if you cannot lose weight through diet and exercise or have serious health problems caused by obesity. There are different types of weight loss surgery. They often limit the amount of food you can take in. Some types of surgery also affect how you digest food and absorb nutrients. All types have risks and complications, such as infections, hernias, and blood clots. Many people who have the surgery lose weight quickly, but regain some weight later on. If you follow diet and exercise recommendations, you can keep most of the weight off. You will also need medical follow-up for the rest of your life. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Gastric Cancer see Stomach Cancer

The stomach is an organ between the esophagus and the small intestine. It mixes food with stomach acid and helps digest protein. Stomach cancer mostly affects older people - two-thirds of people who have it are over age 65. Your risk of getting it is also higher if you Have had a Helicobacter pylori infection Have had stomach inflammation Are a man Eat lots of salted, smoked, or pickled foods Smoke cigarettes Have a family history of stomach cancer It is hard to diagnose stomach cancer in its early stages. Indigestion and stomach discomfort can be symptoms of early cancer, but other problems can cause the same symptoms. In advanced cases, there may be blood in your stool, vomiting, unexplained weight loss, jaundice, or trouble swallowing. Doctors diagnose stomach cancer with a physical exam, blood and imaging tests, an endoscopy, and a biopsy. Because it is often found late, it can be hard to treat stomach cancer. Treatment options include surgery, chemotherapy, radiation or a combination. NIH: National Cancer Institute

Gastric Disorders see Stomach Disorders

Your stomach is an organ between your esophagus and small intestine. It is where digestion of protein begins. The stomach has three tasks. It stores swallowed food. It mixes the food with stomach acids. Then it sends the mixture on to the small intestine. Most people have a problem with their stomach at one time or another. Indigestion and heartburn are common problems. You can relieve some stomach problems with over-the-counter medicines and lifestyle changes, such as avoiding fatty foods or eating more slowly. Other problems like peptic ulcers or GERD require medical attention. You should see a doctor if you have any of the following: Blood when you have a bowel movement Severe abdominal pain Heartburn not relieved by antacids Unintended weight loss Ongoing vomiting or diarrhea NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Gastritis see Stomach Disorders

Your stomach is an organ between your esophagus and small intestine. It is where digestion of protein begins. The stomach has three tasks. It stores swallowed food. It mixes the food with stomach acids. Then it sends the mixture on to the small intestine. Most people have a problem with their stomach at one time or another. Indigestion and heartburn are common problems. You can relieve some stomach problems with over-the-counter medicines and lifestyle changes, such as avoiding fatty foods or eating more slowly. Other problems like peptic ulcers or GERD require medical attention. You should see a doctor if you have any of the following: Blood when you have a bowel movement Severe abdominal pain Heartburn not relieved by antacids Unintended weight loss Ongoing vomiting or diarrhea NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Gastroenteritis

Have you ever had the "stomach flu?" What you probably had was gastroenteritis - not a type of flu at all. Gastroenteritis is an inflammation of the lining of the intestines caused by a virus, bacteria or parasites. Viral gastroenteritis is the second most common illness in the U.S. The cause is often a norovirus infection. It spreads through contaminated food or water, and contact with an infected person. The best prevention is frequent hand washing. Symptoms of gastroenteritis include diarrhea, abdominal pain, vomiting, headache, fever and chills. Most people recover with no treatment. The most common problem with gastroenteritis is dehydration. This happens if you do not drink enough fluids to replace what you lose through vomiting and diarrhea. Dehydration is most common in babies, young children, the elderly and people with weak immune systems. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Gastroesophageal Reflux see GERD

Your esophagus is the tube that carries food from your mouth to your stomach. Gastroesophageal reflux disease (GERD) happens when a muscle at the end of your esophagus does not close properly. This allows stomach contents to leak back, or reflux, into the esophagus and irritate it. You may feel a burning in the chest or throat called heartburn. Sometimes, you can taste stomach fluid in the back of the mouth. If you have these symptoms more than twice a week, you may have GERD. You can also have GERD without having heartburn. Your symptoms could include a dry cough, asthma symptoms, or trouble swallowing. Anyone, including infants and children, can have GERD. If not treated, it can lead to more serious health problems. In some cases, you might need medicines or surgery. However, many people can improve their symptoms by Avoiding alcohol and spicy, fatty or acidic foods that trigger heartburn Eating smaller meals Not eating close to bedtime Losing weight if needed Wearing loose-fitting clothes NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Gastrointestinal Bleeding

Your digestive or gastrointestinal (GI) tract includes the esophagus, stomach, small intestine, large intestine or colon, rectum, and anus. Bleeding can come from any of these areas. The amount of bleeding can be so small that only a lab test can find it. Signs of bleeding in the digestive tract depend where it is and how much bleeding there is. Signs of bleeding in the upper digestive tract include Bright red blood in vomit Vomit that looks like coffee grounds Black or tarry stool Dark blood mixed with stool Signs of bleeding in the lower digestive tract include Black or tarry stool Dark blood mixed with stool Stool mixed or coated with bright red blood GI bleeding is not a disease, but a symptom of a disease. There are many possible causes of GI bleeding, including hemorrhoids, peptic ulcers, tears or inflammation in the esophagus, diverticulosis and diverticulitis, ulcerative colitis and Crohn's disease, colonic polyps, or cancer in the colon, stomach or esophagus. The test used most often to look for the cause of GI bleeding is called endoscopy. It uses a flexible instrument inserted through the mouth or rectum to view the inside of the GI tract. A type of endoscopy called colonoscopy looks at the large intestine. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Gastrointestinal Diseases see Digestive Diseases

When you eat, your body breaks food down to a form it can use to build and nourish cells and provide energy. This process is called digestion. Your digestive system is a series of hollow organs joined in a long, twisting tube. It runs from your mouth to your anus and includes your esophagus, stomach, and small and large intestines. Your liver, gallbladder and pancreas are also involved. They produce juices to help digestion. There are many types of digestive disorders. The symptoms vary widely depending on the problem. In general, you should see your doctor if you have Blood in your stool Changes in bowel habits Severe abdominal pain Unintentional weight loss Heartburn not relieved by antacids NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Gastrointestinal Stromal Tumors see Intestinal Cancer

Your small intestine is part of your digestive system. It is a long tube that connects your stomach to your large intestine. Intestinal cancer is rare, but eating a high-fat diet or having Crohn's disease, celiac disease, or a history of colonic polyps can increase your risk. Possible signs of small intestine cancer include Abdominal pain Weight loss for no reason Blood in the stool A lump in the abdomen Imaging tests that create pictures of the small intestine and the area around it can help diagnose intestinal cancer and show whether it has spread. Surgery is the most common treatment. Additional options include chemotherapy, radiation therapy, or a combination. NIH: National Cancer Institute

Gastroparesis see Stomach Disorders

Your stomach is an organ between your esophagus and small intestine. It is where digestion of protein begins. The stomach has three tasks. It stores swallowed food. It mixes the food with stomach acids. Then it sends the mixture on to the small intestine. Most people have a problem with their stomach at one time or another. Indigestion and heartburn are common problems. You can relieve some stomach problems with over-the-counter medicines and lifestyle changes, such as avoiding fatty foods or eating more slowly. Other problems like peptic ulcers or GERD require medical attention. You should see a doctor if you have any of the following: Blood when you have a bowel movement Severe abdominal pain Heartburn not relieved by antacids Unintended weight loss Ongoing vomiting or diarrhea NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Gastroplasty see Weight Loss Surgery

Weight loss surgery helps people with extreme obesity to lose weight. It may be an option if you cannot lose weight through diet and exercise or have serious health problems caused by obesity. There are different types of weight loss surgery. They often limit the amount of food you can take in. Some types of surgery also affect how you digest food and absorb nutrients. All types have risks and complications, such as infections, hernias, and blood clots. Many people who have the surgery lose weight quickly, but regain some weight later on. If you follow diet and exercise recommendations, you can keep most of the weight off. You will also need medical follow-up for the rest of your life. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Gaucher Disease

Gaucher disease is a rare, inherited disorder. It is a type of lipid metabolism disorder. If you have it, you do not have enough of an enzyme called glucocerebrosidase. This causes too much of a fatty substance to build up in your spleen, liver, lungs, bones and, sometimes, your brain. This prevents these organs from working properly. There are three types: Type 1, the most common form, causes liver and spleen enlargement, bone pain and broken bones, and, sometimes, lung and kidney problems. It does not affect the brain. It can occur at any age. Type 2, which causes severe brain damage, appears in infants. Most children who have it die by age 2. In type 3, there may be liver and spleen enlargement. The brain is gradually affected. It usually starts in childhood or adolescence. Gaucher disease has no cure. Treatment options for types 1 and 3 include medicine and enzyme replacement therapy, which is usually very effective. There is no good treatment for the brain damage of types 2 and 3. NIH: National Institute of Neurological Disorders and Stroke


Generalized Anxiety Disorder see Anxiety

Fear and anxiety are part of life. You may feel anxious before you take a test or walk down a dark street. This kind of anxiety is useful - it can make you more alert or careful. It usually ends soon after you are out of the situation that caused it. But for millions of people in the United States, the anxiety does not go away, and gets worse over time. They may have chest pains or nightmares. They may even be afraid to leave home. These people have anxiety disorders. Types include Panic disorder Obsessive-compulsive disorder Post-traumatic stress disorder Phobias Generalized anxiety disorder Treatment can involve medicines, therapy or both. NIH: National Institute of Mental Health

Genes and Gene Therapy

Genes are the building blocks of inheritance. Passed from parent to child, they contain instructions for making proteins. If genes don't produce the right proteins or don't produce them correctly, a child can have a genetic disorder. Gene therapy is an experimental technique that uses genes to treat or prevent disease. The most common form of gene therapy involves inserting a normal gene to replace an abnormal gene. Other approaches include Swapping an abnormal gene for a normal one Repairing an abnormal gene Altering the degree to which a gene is turned on or off Although there is much hope for gene therapy, it is still experimental. Genetics Home Reference

Genetic Brain Disorders

A genetic brain disorder is caused by a variation or a mutation in a gene. A variation is a different form of a gene. A mutation is a change in a gene. Genetic brain disorders affect the development and function of the brain. Some genetic brain disorders are due to random gene mutations or mutations caused by environmental exposure, such as cigarette smoke. Other disorders are inherited, which means that a mutated gene or group of genes is passed down through a family. They can also be due to a combination of both genetic changes and other outside factors. Some examples of genetic brain disorders include Leukodystrophies Phenylketonuria Tay-Sachs disease Wilson disease Many people with genetic brain disorders fail to produce enough of certain proteins that influence brain development and function. These brain disorders can cause serious problems that affect the nervous system. Some have treatments to control symptoms. Some are life-threatening.

Genetic Counseling

Genetic counseling provides information and support to people who have, or may be at risk for, genetic disorders. A genetic counselor meets with you to discuss genetic risks. The counseling may be for yourself or a family member. Or you may get it when you are planning or expecting a baby. You may follow up with genetic testing. There are many reasons to seek genetic counseling. You may consider it if you Have a personal or family history of a genetic condition or birth defect Are pregnant or planning to be pregnant after age 35 Already have a child with a genetic disorder or birth defect Have had two or more pregnancy losses or a baby who died Have had ultrasound or screening tests that suggest a possible problem Genetics Home Reference

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

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

Genital Herpes

Genital herpes is a sexually transmitted disease (STD) caused by a herpes simplex virus (HSV). It can cause sores on your genital or rectal area, buttocks, and thighs. You can get it from having vaginal, anal, or oral sex with someone who has it. The virus can spread even when sores are not present. Mothers can also infect their babies during childbirth. Symptoms of herpes are called outbreaks. You usually get sores near the area where the virus has entered the body. The sores are blisters which break and become painful, and then heal. Sometimes people do not know they have herpes because they have no symptoms or very mild symptoms. The virus can be more serious in newborn babies or in people with weak immune systems. Repeat outbreaks are common, especially during the first year. Over time, you get them less often and the symptoms become milder. The virus stays in your body for life. There are tests that can diagnose genital herpes. There is no cure. However, medicines can help lessen symptoms, decrease outbreaks, and lower the risk of passing the virus to others. Correct usage of latex condoms can reduce, but not eliminate, the risk of catching or spreading herpes. NIH: National Institute of Allergy and Infectious Diseases

Genital Warts

Genital warts are a sexually transmitted disease (STD) caused by the human papillomavirus (HPV). The warts are soft, moist, pink, or flesh-colored bumps. You can have one or many of these bumps. In women, the warts usually occur in or around the vagina, on the cervix or around the anus. In men, genital warts are less common but might occur on the tip of the penis. You can get genital warts during oral, vaginal, or anal sex with an infected partner. Correct usage of latex condoms greatly reduces, but does not completely eliminate, the risk of catching or spreading HPV. HPV vaccines may help prevent some of the HPV infections that cause genital warts. Your health care provider usually diagnoses genital warts by seeing them. The warts might disappear on their own. If not, your health care provider can treat or remove them. The virus stays in your body even after treatment, so warts can come back. NIH: National Institute of Allergy and Infectious Diseases

Geographic Tongue see Tongue Disorders

Your tongue helps you taste, swallow, and chew. You also use it to speak. Your tongue is made up of many muscles. The upper surface contains your taste buds. Problems with the tongue include Pain Swelling Changes in color or texture Abnormal movement or difficulty moving the tongue Taste problems These problems can have many different causes. Treatment depends on the underlying problem.

GERD

Your esophagus is the tube that carries food from your mouth to your stomach. Gastroesophageal reflux disease (GERD) happens when a muscle at the end of your esophagus does not close properly. This allows stomach contents to leak back, or reflux, into the esophagus and irritate it. You may feel a burning in the chest or throat called heartburn. Sometimes, you can taste stomach fluid in the back of the mouth. If you have these symptoms more than twice a week, you may have GERD. You can also have GERD without having heartburn. Your symptoms could include a dry cough, asthma symptoms, or trouble swallowing. Anyone, including infants and children, can have GERD. If not treated, it can lead to more serious health problems. In some cases, you might need medicines or surgery. However, many people can improve their symptoms by Avoiding alcohol and spicy, fatty or acidic foods that trigger heartburn Eating smaller meals Not eating close to bedtime Losing weight if needed Wearing loose-fitting clothes NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Germ Warfare see Biodefense and Bioterrorism

A bioterrorism attack is the deliberate release of viruses, bacteria, or other germs to cause illness or death. These germs are often found in nature. But they can sometimes be made more harmful by increasing their ability to cause disease, spread, or resist medical treatment. Biological agents spread through the air, water, or in food. Some can also spread from person to person. They can be very hard to detect. They don't cause illness for several hours or days. Scientists worry that anthrax, botulism, Ebola and other hemorrhagic fever viruses, plague, or smallpox could be used as biological agents. Biodefense uses medical measures to protect people against bioterrorism. This includes medicines and vaccinations. It also includes medical research and preparations to defend against bioterrorist attacks. Centers for Disease Control and Prevention

German Measles see Rubella

Rubella is an infection caused by a virus. It is usually mild with fever and a rash. About half of the people who get rubella do not have symptoms. If you do get them, symptoms may include A rash that starts on the face and spreads to the body Mild fever Aching joints, especially in young women Swollen glands Rubella is most dangerous for a pregnant woman's baby. It can cause miscarriage or birth defects. Rubella spreads when an infected person coughs or sneezes. People without symptoms can still spread it. There is no treatment, but the measles-mumps-rubella (MMR) vaccine can prevent it. Centers for Disease Control and Prevention

Germs and Hygiene

When you cough or sneeze, you send tiny germ-filled droplets into the air. Colds and flu usually spread that way. You can help stop the spread of germs by Covering your mouth and nose when you sneeze or cough. Sneeze or cough into your elbow, not your hands. Cleaning your hands often - always before you eat or prepare food, and after you use the bathroom or change a diaper Avoiding touching your eyes, nose or mouth Hand washing is one of the most effective and most overlooked ways to stop disease. Soap and water work well to kill germs. Wash for at least 20 seconds and rub your hands briskly. Disposable hand wipes or gel sanitizers also work well.

Gestational Carrier see Assisted Reproductive Technology

Assisted reproductive technology (ART) is used to treat infertility. It includes fertility treatments that handle both a woman's egg and a man's sperm. It works by removing eggs from a woman's body. The eggs are then mixed with sperm to make embryos. The embryos are then put back in the woman's body. In vitro fertilization (IVF) is the most common and effective type of ART. ART procedures sometimes use donor eggs, donor sperm, or previously frozen embryos. It may also involve a surrogate or gestational carrier. A surrogate is a woman who becomes pregnant with sperm from the male partner of the couple. A gestational carrier becomes pregnant with an egg from the female partner and the sperm from the male partner. The most common complication of ART is a multiple pregnancy. It can be prevented or minimized by limiting the number of embryos that are put into the woman's body.

Gestational 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

Gestational Hypertension 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

Gestational Trophoblastic Disease see Tumors and Pregnancy

Tumors during pregnancy are rare, but they can happen. Tumors can be either benign or malignant. Benign tumors aren't cancer. Malignant ones are. The most common cancers in pregnancy are breast cancer, cervical cancer, lymphoma, and melanoma. Cancer itself rarely harms the baby, and some cancer treatments are safe during pregnancy. You and your health care provider will work together to find the best treatment. Your options will depend on how far along the pregnancy is, as well as the type, size, and stage of your cancer. Another type of tumor that women can get is called a gestational trophoblastic disease (GTD). It happens when a fertilized egg doesn't become a fetus. GTD is not always easy to find. It is usually benign, but some types can be malignant. The most common type of GTD is a molar pregnancy. In its early stages, it may look like a normal pregnancy. You should see your health care provider if you have vaginal bleeding (not menstrual bleeding). Treatment depends on the type of tumor, whether it has spread to other places, and your overall health.

GHB see Club Drugs

Club drugs are group of psychoactive drugs. They act on the central nervous system and can cause changes in mood, awareness, and how you act. These drugs are often abused by young adults at all-night dance parties, dance clubs, and bars. They include Methylenedioxymethamphetamine (MDMA), also known as Ecstasy XTC, X, E, Adam, Molly, Hug Beans, and Love Drug Gamma-hydroxybutyrate (GHB), also known as G, Liquid Ecstasy, and Soap Ketamine, also known as Special K, K, Vitamin K, and Jet Rohypnol, also known as Roofies Methamphetamine, also known as Speed, Ice, Chalk, Meth, Crystal, Crank, and Glass Lysergic Acid Diethylamide (LSD), also known as Acid, Blotter, and Dots Some of these drugs are approved for certain medical uses. Other uses of these drugs are abuse. Club drugs are also sometimes used as "date rape" drugs, to make someone unable to say no to or fight back against sexual assault. Abusing these drugs can cause serious health problems and sometimes death. They are even more dangerous if you use them with alcohol. NIH: National Institute on Drug Abuse

GI Bleeding see Gastrointestinal Bleeding

Your digestive or gastrointestinal (GI) tract includes the esophagus, stomach, small intestine, large intestine or colon, rectum, and anus. Bleeding can come from any of these areas. The amount of bleeding can be so small that only a lab test can find it. Signs of bleeding in the digestive tract depend where it is and how much bleeding there is. Signs of bleeding in the upper digestive tract include Bright red blood in vomit Vomit that looks like coffee grounds Black or tarry stool Dark blood mixed with stool Signs of bleeding in the lower digestive tract include Black or tarry stool Dark blood mixed with stool Stool mixed or coated with bright red blood GI bleeding is not a disease, but a symptom of a disease. There are many possible causes of GI bleeding, including hemorrhoids, peptic ulcers, tears or inflammation in the esophagus, diverticulosis and diverticulitis, ulcerative colitis and Crohn's disease, colonic polyps, or cancer in the colon, stomach or esophagus. The test used most often to look for the cause of GI bleeding is called endoscopy. It uses a flexible instrument inserted through the mouth or rectum to view the inside of the GI tract. A type of endoscopy called colonoscopy looks at the large intestine. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Giant Cell Arteritis

Giant cell arteritis is a disorder that causes inflammation of your arteries, usually in the scalp, neck, and arms. It narrows the arteries, which keeps blood from flowing well. Giant cell arteritis often occurs with another disorder called polymyalgia rheumatica. Both are more common in women than in men. They almost always affect people over the age of 50. Early symptoms of giant cell arteritis resemble the flu: fatigue, loss of appetite, and fever. Other symptoms include Headaches Pain and tenderness over the temples Double vision or visual loss, dizziness Problems with coordination and balance Pain in your jaw and tongue Your doctor will make the diagnosis based on your medical history, symptoms, and a physical exam. There is no single test to diagnose giant cell arteritis, but you may have tests that measure inflammation. Treatment is usually with corticosteroids. Early treatment is important; otherwise there is a risk of permanent vision loss or stroke. However, when properly treated, giant cell arteritis rarely comes back. NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Giardia Infections

Giardiasis is an illness caused by a parasite called Giardia intestinalis. It lives in soil, food, and water. It may also be on surfaces that have been contaminated with waste. You can become infected if you swallow the parasite. You can also get it if you're exposed to human feces (poop) through sexual contact. The risk of getting giardia is higher for travelers to countries where it is common, people in child care settings, and those who drink untreated water. Diarrhea is the main symptom of giardia infection. Others include Passing gas Greasy stools Stomach cramps Upset stomach or nausea These symptoms may lead to weight loss and loss of body fluids. Some people have no symptoms at all. Symptoms of infection often last two to six weeks. Stool sample tests can diagnose it. You often need to collect several samples to test. Doctors use several drugs to treat it. The best way to prevent giardia infection is to practice good hygiene, including frequent hand washing. You should not drink water that may be contaminated. You should also peel or wash fresh fruit and vegetables before eating. Centers for Disease Control and Prevention

Gilbert Disease see Liver Diseases

Your liver is the largest organ inside your body. It helps your body digest food, store energy, and remove poisons. There are many kinds of liver diseases. Viruses cause some of them, like hepatitis A, hepatitis B, and hepatitis C. Others can be the result of drugs, poisons or drinking too much alcohol. If the liver forms scar tissue because of an illness, it's called cirrhosis. Jaundice, or yellowing of the skin, can be one sign of liver disease. Cancer can affect the liver. You could also inherit a liver disease such as hemochromatosis. Tests such as imaging tests and liver function tests can check for liver damage and help to diagnose liver diseases.

Glandular Fever see Infectious Mononucleosis

Infectious mononucleosis, or "mono", is an infection usually caused by the Epstein-Barr virus. The virus spreads through saliva, which is why it's sometimes called "kissing disease." Mono occurs most often in teens and young adults. However, you can get it at any age. Symptoms of mono include Fever Sore throat Swollen lymph glands Sometimes you may also have a swollen spleen. Serious problems are rare. A blood test can show if you have mono. Most people get better in two to four weeks. However, you may feel tired for a few months afterward. Treatment focuses on helping symptoms and includes medicines for pain and fever, warm salt water gargles and plenty of rest and fluids.

Glasses see Eye Wear

Eye wear protects or corrects your vision. Examples are Sunglasses Safety goggles Glasses (also called eyeglasses) Contact lenses If you need corrective lenses, you may be able to choose between contacts or glasses. Either usually requires a prescription. Almost anyone can wear glasses. Contact lenses require more careful handling. Many jobs and some sports carry a risk of eye injury. Thousands of children and adults get eye injuries every year. Most are preventable with proper eye protection. Everyone is at risk for eye damage from the sun year-round. It's important to regularly use sunglasses that block out at least 99 percent of UV rays.

Glaucoma

Glaucoma is a group of diseases that can damage the eye's optic nerve. It is a leading cause of blindness in the United States. It usually happens when the fluid pressure inside the eyes slowly rises, damaging the optic nerve. Often there are no symptoms at first. Without treatment, people with glaucoma will slowly lose their peripheral, or side vision. They seem to be looking through a tunnel. Over time, straight-ahead vision may decrease until no vision remains. A comprehensive eye exam can tell if you have glaucoma. People at risk should get eye exams at least every two years. They include African Americans over age 40 People over age 60, especially Mexican Americans People with a family history of glaucoma There is no cure, but glaucoma can usually be controlled. Early treatment can help protect your eyes against vision loss. Treatments usually include prescription eyedrops and/or surgery. NIH: National Eye Institute

Glioma see Brain Tumors

A brain tumor is a growth of abnormal cells in the tissues of the brain. Brain tumors can be benign, with no cancer cells, or malignant, with cancer cells that grow quickly. Some are primary brain tumors, which start in the brain. Others are metastatic, and they start somewhere else in the body and move to the brain. Brain tumors can cause many symptoms. Some of the most common are Headaches, often in the morning Nausea and vomiting Changes in your ability to talk, hear, or see Problems with balance or walking Problems with thinking or memory Feeling weak or sleepy Changes in your mood or behavior Seizures Doctors diagnose brain tumors by doing a neurologic exam and tests including an MRI, CT scan, and biopsy. Treatment options include watchful waiting, surgery, radiation therapy, chemotherapy, and targeted therapy. Targeted therapy uses substances that attack cancer cells without harming normal cells. Many people get a combination of treatments. NIH: National Cancer Institute

Global Health see International Health

The spread of a disease doesn't stop at a country's borders. With more people traveling to other countries and living in crowded cities, it's easier for germs to spread. Infectious diseases that start in one part of the world can quickly reach another. Resistance to medicines such as antbiotics is on the rise. This makes it harder to treat certain diseases. Natural and man-made disasters create refugee populations with immediate and long-term health problems. Some of the major diseases currently affecting countries around the globe include HIV/AIDS, malaria, Zika, and tuberculosis. Climate change is also an international problem which can affect people's health. Many countries and health organizations are working together and sharing information on these and other health issues.

Global Warming see Climate Change

Climate is the average weather in a place over a period of time. Climate change is major change in temperature, rainfall, snow, or wind patterns lasting for many years. It can be caused by natural factors or by human activities. Today climate changes are occurring at an increasingly rapid rate. Climate change can affect our health. It can lead to More heat-related illness and deaths More pollen, mold, and air pollution. This can cause an increase in allergies, asthma, and breathing problems. Mosquitoes and other insects that carry diseases spreading to areas that used to be too cold for them. More floods and rising sea levels. This can cause an increase in contamination of food and water. More extreme weather events, such as hurricanes and wildfires. These can cause death, injuries, stress, and mental health problems. Researchers are studying the best ways to lessen climate change and reduce its impact on our health. NIH: National Institute of Environmental Health Sciences

Glossitis see Tongue Disorders

Your tongue helps you taste, swallow, and chew. You also use it to speak. Your tongue is made up of many muscles. The upper surface contains your taste buds. Problems with the tongue include Pain Swelling Changes in color or texture Abnormal movement or difficulty moving the tongue Taste problems These problems can have many different causes. Treatment depends on the underlying problem.

Glucocorticoids 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.

Glucose see Blood Sugar

Blood sugar, or glucose, is the main sugar found in your blood. It comes from the food you eat, and is your body's main source of energy. Your blood carries glucose to all of your body's cells to use for energy. Diabetes is a disease in which your blood sugar levels are too high. Over time, having too much glucose in your blood can cause serious problems. Even if you don't have diabetes, sometimes you may have problems with blood sugar that is too low or too high. Keeping a regular schedule of eating, activity, and taking any medicines you need can help. If you do have diabetes, it is very important to keep your blood sugar numbers in your target range. You may need to check your blood sugar several times each day. Your health care provider will also do a blood test called an A1C. It checks your average blood sugar level over the past three months. If your blood sugar is too high, you may need to take medicines and/or follow a special diet. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Glucose-6-phosphate Dehydrogenase Deficiency see G6PD Deficiency

Glucose-6-phosphate dehydrogenase (G6PD) deficiency is a genetic disorder that is most common in males. About 1 in 10 African American males in the United States has it. G6PD deficiency mainly affects red blood cells, which carry oxygen from the lungs to tissues throughout the body. The most common medical problem it can cause is hemolytic anemia. That happens when red blood cells are destroyed faster than the body can replace them. If you have G6PD deficiency, you may not have symptoms. Symptoms happen if your red blood cells are exposed to certain chemicals in food or medicine, certain bacterial or viral infections, or stress. They may include Paleness Jaundice Dark urine Fatigue Shortness of breath Enlarged spleen Rapid heart rate A blood test can tell if you have it. Treatments include medicines to treat infection, avoiding substances that cause the problem with red blood cells, and sometimes transfusions. NIH: National Library of Medicine

Gluten Intolerance see Celiac Disease; Gluten Sensitivity

Celiac disease is an immune disease in which people can't eat gluten because it will damage their small intestine. If you have celiac disease and eat foods with gluten, your immune system responds by damaging the small intestine. Gluten is a protein found in wheat, rye, and barley. It is found mainly in foods but may also be in other products like medicines, vitamins and supplements, lip balm, and even the glue on stamps and envelopes. Celiac disease affects each person differently. Symptoms may occur in the digestive system, or in other parts of the body. One person might have diarrhea and abdominal pain, while another person may be irritable or depressed. Irritability is one of the most common symptoms in children. Some people have no symptoms. Celiac disease is genetic. Blood tests can help your doctor diagnose the disease. Your doctor may also need to examine a small piece of tissue from your small intestine. Treatment is a diet free of gluten. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Gluten Sensitivity

Gluten is a protein found in wheat, rye, and barley. It is found mainly in foods but may also be in other products like medicines, vitamins, and supplements. People with gluten sensitivity have problems with gluten. It is different from celiac disease, an immune disease in which people can't eat gluten because it will damage their small intestine. Some of the symptoms of gluten sensitivity are similar to celiac disease. They include tiredness and stomachaches. It can cause other symptoms too, including muscle cramps and leg numbness. But it does not damage the small intestine like celiac disease. Researchers are still learning more about gluten sensitivity. If your health care provider thinks you have it, he or she may suggest that you stop eating gluten to see if your symptoms go away. However, you should first be tested to rule out celiac disease. Dept. of Health and Human Services Office on Women's Health

Gluten-Sensitive Enteropathy see Celiac Disease

Celiac disease is an immune disease in which people can't eat gluten because it will damage their small intestine. If you have celiac disease and eat foods with gluten, your immune system responds by damaging the small intestine. Gluten is a protein found in wheat, rye, and barley. It is found mainly in foods but may also be in other products like medicines, vitamins and supplements, lip balm, and even the glue on stamps and envelopes. Celiac disease affects each person differently. Symptoms may occur in the digestive system, or in other parts of the body. One person might have diarrhea and abdominal pain, while another person may be irritable or depressed. Irritability is one of the most common symptoms in children. Some people have no symptoms. Celiac disease is genetic. Blood tests can help your doctor diagnose the disease. Your doctor may also need to examine a small piece of tissue from your small intestine. Treatment is a diet free of gluten. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Goiter see Thyroid Diseases

Your thyroid is a butterfly-shaped gland in your neck, just above your collarbone. It is one of your endocrine glands, which make hormones. Thyroid hormones control the rate of many activities in your body. These include how fast you burn calories and how fast your heart beats. All of these activities are your body's metabolism. Thyroid problems include Goiter - enlargement of the thyroid gland Hyperthyroidism - when your thyroid gland makes more thyroid hormones than your body needs Hypothyroidism - when your thyroid gland does not make enough thyroid hormones Thyroid cancer Thyroid nodules - lumps in the thyroid gland Thyroiditis - swelling of the thyroid To diagnose thyroid diseases, doctors use a medical history, physical exam, and thyroid tests. They sometimes also use a biopsy. Treatment depends on the problem, but may include medicines, radioiodine therapy, or thyroid surgery. Dept. of Health and Human Services Office on Women's Health

Gonorrhea

Gonorrhea is a sexually transmitted disease. It is most common in young adults. The bacteria that cause gonorrhea can infect the genital tract, mouth, or anus. You can get gonorrhea during vaginal, oral, or anal sex with an infected partner. A pregnant woman can pass it to her baby during childbirth. Gonorrhea does not always cause symptoms. In men, gonorrhea can cause pain when urinating and discharge from the penis. If untreated, it can cause problems with the prostate and testicles. In women, the early symptoms of gonorrhea often are mild. Later, it can cause bleeding between periods, pain when urinating, and increased discharge from the vagina. If untreated, it can lead to pelvic inflammatory disease, which causes problems with pregnancy and infertility. Your health care provider will diagnose gonorrhea with lab tests. Treatment is with antibiotics. Treating gonorrhea is becoming more difficult because drug-resistant strains are increasing. Correct usage of latex condoms greatly reduces, but does not eliminate, the risk of catching or spreading gonorrhea. NIH: National Institute of Allergy and Infectious Diseases

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

Granulomatosis with Polyangiitis

Granulomatosis with polyangiitis (GPA), previously known as Wegener's granulomatosis, is a rare disease. It is a type of vasculitis, or inflammation of the blood vessels. The inflammation limits the flow of blood to important organs, causing damage. It can affect any organ, but it mainly affects the sinuses, nose, trachea (windpipe), lungs, and kidneys. The cause of GPA is unknown. It can affect people at any age. Men and women are equally affected. It is more common in whites. Symptoms may include joint pain, weakness, tiredness, and cold symptoms such as a runny nose that doesn't get better. Doctors use blood tests, chest X-rays, and biopsies to diagnose GPA and rule out other causes of the symptoms. Early treatment is important. Most people improve with medicines to slow or stop the inflammation. NIH: National Institute of Allergy and Infectious Diseases

Graves' Disease see Hyperthyroidism

Your thyroid is a butterfly-shaped gland in your neck, just above your collarbone. It is one of your endocrine glands, which make hormones. Thyroid hormones control the rate of many activities in your body. These include how fast you burn calories and how fast your heart beats. All of these activities are your body's metabolism. If your thyroid is too active, it makes more thyroid hormones than your body needs. This is called hyperthyroidism. Hyperthyroidism is more common in women, people with other thyroid problems, and those over 60 years old. Graves' disease, an autoimmune disorder, is the most common cause. Other causes include thyroid nodules, thyroiditis, consuming too much iodine, and taking too much synthetic thyroid hormone. The symptoms can vary from person to person. They may include Being nervous or irritable Mood swings Fatigue or muscle weakness Heat intolerance Trouble sleeping Hand tremors Rapid and irregular heartbeat Frequent bowel movements or diarrhea Weight loss Goiter, which is an enlarged thyroid that may cause the neck to look swollen To diagnose hyperthyroidism, your doctor will do a physical exam, look at your symptoms, and do thyroid tests. Treatment is with medicines, radioiodine therapy, or thyroid surgery. No single treatment works for everyone. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Grief see Bereavement

Bereavement is the period of grief and mourning after a death. When you grieve, it's part of the normal process of reacting to a loss. You may experience grief as a mental, physical, social or emotional reaction. Mental reactions can include anger, guilt, anxiety, sadness and despair. Physical reactions can include sleeping problems, changes in appetite, physical problems or illness. How long bereavement lasts can depend on how close you were to the person who died, if the person's death was expected and other factors. Friends, family and faith may be sources of support. Grief counseling or grief therapy is also helpful to some people. NIH: National Cancer Institute

Grippe see Flu

Flu is a respiratory infection caused by a number of viruses. The viruses pass through the air and enter your body through your nose or mouth. Between 5% and 20% of people in the U.S. get the flu each year. The flu can be serious or even deadly for elderly people, newborn babies, and people with certain chronic illnesses. Symptoms of the flu come on suddenly and are worse than those of the common cold. They may include Body or muscle aches Chills Cough Fever Headache Sore throat Is it a cold or the flu? Colds rarely cause a fever or headaches. Flu almost never causes an upset stomach. And "stomach flu" isn't really flu at all, but gastroenteritis. Most people with the flu recover on their own without medical care. People with mild cases of the flu should stay home and avoid contact with others, except to get medical care. If you get the flu, your health care provider may prescribe medicine to help your body fight the infection and lessen symptoms. The main way to keep from getting the flu is to get a yearly flu vaccine. Good hygiene, including hand washing, can also help. NIH: National Institute of Allergy and Infectious Diseases

Growth Disorders

Does your child seem much shorter - or much taller - than other kids his or her age? It could be normal. Some children may be small for their age but still be developing normally. Some children are short or tall because their parents are. But some children have growth disorders. Growth disorders are problems that prevent children from developing normal height, weight, sexual maturity or other features. Very slow or very fast growth can sometimes signal a gland problem or disease. The pituitary gland makes growth hormone, which stimulates the growth of bone and other tissues. Children who have too little of it may be very short. Treatment with growth hormone can stimulate growth. People can also have too much growth hormone. Usually the cause is a pituitary gland tumor, which is not cancer. Too much growth hormone can cause gigantism in children, where their bones and their body grow too much. In adults, it can cause acromegaly, which makes the hands, feet and face larger than normal. Possible treatments include surgery to remove the tumor, medicines, and radiation therapy.

Guillain-Barre Syndrome

Guillain-Barre syndrome is a rare disorder that causes your immune system to attack your peripheral nervous system (PNS). The PNS nerves connect your brain and spinal cord with the rest of your body. Damage to these nerves makes it hard for them to transmit signals. As a result, your muscles have trouble responding to your brain. No one knows what causes the syndrome. Sometimes it is triggered by an infection, surgery, or a vaccination. The first symptom is usually weakness or a tingling feeling in your legs. The feeling can spread to your upper body. In severe cases, you become almost paralyzed. This is life-threatening. You might need a respirator to breathe. Symptoms usually worsen over a period of weeks and then stabilize. Guillain-Barre can be hard to diagnose. Possible tests include nerve tests and a spinal tap. Most people recover. Recovery can take a few weeks to a few years. Treatment can help symptoms, and may include medicines or a procedure called plasma exchange. NIH: National Institute of Neurological Disorders and Stroke

Gulf Oil Spill see Oil Spills

Oil spills often happen because of accidents, when people make mistakes or equipment breaks down. Other causes include natural disasters or deliberate acts. Oil spills have major environmental and economic effects. Oil spills can also affect human health. These effects can depend on what kind of oil was spilled and where (on land, in a river, or in the ocean). Other factors include what kind of exposure and how much exposure there was. People who clean up the spill are more at risk. Problems could include skin and eye irritation, neurologic and breathing problems, and stress. Not much is known about the long-term effects of oil spills.

Gulf War Syndrome 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.

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

Gun Safety

Many U.S. households have guns, but they can cause harm if not handled properly. Here are some things you can do to keep yourself and your family safe: Teach children that they shouldn't touch guns and that if they see a gun, to leave it alone and tell an adult. If your children play at another home, talk to the parents about gun safety. Treat every gun as if it were loaded. Always store guns unloaded. Lock guns in a rack or safe, and hide the keys or combination. Store ammunition away from guns and keep it locked. Don't keep guns in your home if someone in your family has a mental illness, severe depression, or potential for violence.

Gynecomastia see Breast Diseases

Most women experience breast changes at some time. Your age, hormone levels, and medicines you take may cause lumps, bumps, and discharges (fluids that are not breast milk). If you have a breast lump, pain, discharge or skin irritation, see your health care provider. Minor and serious breast problems have similar symptoms. Although many women fear cancer, most breast problems are not cancer. Some common breast changes are Fibrocystic breast changes - lumpiness, thickening and swelling, often just before a woman's period Cysts - fluid-filled lumps Fibroadenomas - solid, round, rubbery lumps that move easily when pushed, occurring most in younger women Intraductal papillomas - growths similar to warts near the nipple Blocked milk ducts Milk production when a woman is not breastfeeding NIH: National Cancer Institute

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