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What is diarrhea?Diarrhea is loose, watery stools (bowel movements). You have diarrhea if you have loose stools three or more times in one day. Acute diarrhea is diarrhea that lasts a short time. It is a common problem. It usually lasts about one or two days, but it may last longer. Then it goes away on its own.Diarrhea lasting more than a few days may be a sign of a more serious problem. Chronic diarrhea -- diarrhea that lasts at least four weeks -- can be a symptom of a chronic disease. Chronic diarrhea symptoms may be continual, or they may come and go.What causes diarrhea?The most common causes of diarrhea includeBacteria from contaminated food or waterViruses such as the flu, norovirus, or rotavirus . Rotavirus is the most common cause of acute diarrhea in children.Parasites, which are tiny organisms found in contaminated food or waterMedicines such as antibiotics, cancer drugs, and antacids that contain magnesiumFood intolerances and sensitivities, which are problems digesting certain ingredients or foods. An example is lactose intolerance.Diseases that affect the stomach, small intestine, or colon, such as Crohn's diseaseProblems with how the colon functions, such as irritable bowel syndromeSome people also get diarrhea after stomach surgery, because sometimes the surgeries can cause food to move through your digestive system more quickly.Sometimes no cause can be found. If your diarrhea goes away within a few days, finding the cause is usually not necessary.Who is at risk for diarrhea?People of all ages can get diarrhea. On average, adults In the United States have acute diarrhea once a year. Young children have it an average of twice a year.People who visit developing countries are at risk for traveler's diarrhea. It is caused by consuming contaminated food or water.What other symptoms might I have with diarrhea?Other possible symptoms of diarrhea includeCramps or pain in the abdomenAn urgent need to use the bathroomLoss of bowel controlIf a virus or bacteria is the cause of your diarrhea, you may also have a fever, chills, and bloody stools.Diarrhea can cause dehydration, which means that your body does not have enough fluid to work properly. Dehydration can be serious, especially for children, older adults, and people with weakened immune systems.When should I see a doctor for diarrhea?Although it is usually not harmful, diarrhea can become dangerous or signal a more serious problem. Contact your health care provider if you haveSigns of dehydrationDiarrhea for more than 2 days, if you are an adult. For children, contact the provider if it lasts more than 24 hours.Severe pain in your abdomen or rectum (for adults)A fever of 102 degrees or higherStools containing blood or pusStools that are black and tarryIf children have diarrhea, parents or caregivers should not hesitate to call a health care provider. Diarrhea can be especially dangerous in newborns and infants.How is the cause of diarrhea diagnosed?To find the cause of diarrhea, your health care provider mayDo a physical examAsk about any medicines you are takingTest your stool or blood to look for bacteria, parasites, or other signs of disease or infectionAsk you to stop eating certain foods to see whether your diarrhea goes awayIf you have chronic diarrhea, your health care provider may perform other tests to look for signs of disease.What are the treatments for diarrhea?Diarrhea is treated by replacing lost fluids and electrolytes to prevent dehydration. Depending on the cause of the problem, you may need medicines to stop the diarrhea or treat an infection.Adults with diarrhea should drink water, fruit juices, sports drinks, sodas without caffeine, and salty broths. As your symptoms improve, you can eat soft, bland food.Children with diarrhea should be given oral rehydration solutions to replace lost fluids and electrolytes.Can diarrhea be prevented?Two types of diarrhea can be prevented - rotavirus diarrhea and traveler's diarrhea. There are vaccines for rotavirus. They are given to babies in two or three doses.You can help prevent traveler's diarrhea by being careful about what you eat and drink when you are in developing countries:Use only bottled or purified water for drinking, making ice cubes, and brushing your teethIf you do use tap water, boil it or use iodine tabletsMake sure that the cooked food you eat is fully cooked and served hotAvoid unwashed or unpeeled raw fruits and vegetablesNIH: National Institute of Diabetes and Digestive and Kidney Diseases

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