Diarrhea describes bowel movements (stools) that are loose and watery. It is very common and usually not serious. Many people will have diarrhea once or twice each year. It typically lasts two to three days and can be treated with over-the-counter (OTC) medicines. Some people often have diarrhea as part of irritable bowel syndrome or other chronic diseases of the large intestine.

What Causes Diarrhea?

Diarrhea may also be caused by:

- Infection by bacteria (the cause of most types of food poisoning)
- Infections by other organisms
- Eating foods that upset the digestive system
- Allergies to certain foods
- Medications
- Radiation therapy
- Diseases of the intestines (Crohn's disease, ulcerative colitis)
- Malabsorption (where the body is unable to adequately absorb certain nutrients from the diet)
- Hyperthyroidism
- Some cancers
- Laxative abuse
- Alcohol abuse
- Digestive tract surgery
- Diabetes
- Competitive running

What Are the Symptoms of Diarrhea? Symptoms of uncomplicated diarrhea include:

- Abdominal bloating or cramps
- Thin or loose stools
- Watery stool
- Sense of urgency to have a bowel movement
- Nausea and vomiting

How Is Diarrhea Treated?

If you have a mild case of diarrhea, you can just let it run its course, or you can treat it with an over-the-counter medicine. Common brand names include Pepto-Bismol, Imodium A-D, and Kaopectate, which are available as liquids or tablets. Follow the instructions on the package.

In addition, you should drink at least six 8-ounce glasses of fluid per day. Choose fruit juice without pulp, broth, or soda (without caffeine). Chicken broth (without the fat), tea with honey, and sports drinks are also good choices. Instead of drinking liquids with your meals, drink liquids between meals. Drink small amounts of fluids frequently.