Diarrhea describes loose, watery stools that occur more frequently than usual. Diarrhea is something everyone experiences. Diarrhea often means more-frequent trips to the toilet and a greater volume of stool.
In most cases, diarrhea signs and symptoms usually last a couple of days. But sometimes diarrhea can last for weeks. In these situations, diarrhea can be a sign of a serious disorder, such as inflammatory bowel disease, or a less serious condition, such as irritable bowel syndrome.

Causes

The most common cause of diarrhea is a virus that infects the gut. The infection usually lasts for two days and is sometimes called "intestinal flu" or "stomach flu." 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
• Radiation therapy
• Diseases of the intestines (Crohn's disease, ulcerative colitis)
• Hyperthyroidism
• Some cancers
• Laxative abuse
• Alcohol abuse
• Digestive tract surgery
• Diabetes
• Competitive running

Symptoms of Diarrhea

Symptoms of diarrhea can be broken down into uncomplicated (or non-serious) diarrhea and complicated diarrhea. Complicated diarrhea may be a sign of a more serious illness.
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
• Blood, mucus, or undigested food in the stool
• Weight loss
• Fever

Treatment

Most cases of diarrhea clear on their own within a couple of days without treatment. If you've tried lifestyle changes and home remedies for diarrhea without success, your doctor may recommend medications or other treatments.
Antibiotics - Antibiotics may help treat diarrhea caused by bacteria or parasites. If a virus is causing your diarrhea, antibiotics won't help.