Everyone occasionally has diarrhea — loose, watery and more-frequent bowel movements. You might also have abdominal cramps and produce a greater volume of stool. Diarrhea varies in specific symptoms, severity and duration. It usually lasts a few days and often disappears without any treatment. Diarrhea can be acute or chronic. Acute diarrhea occurs when the condition lasts for one to two days. You might experience diarrhea as a result of a viral or bacterial infection. Acute diarrhea is fairly common. Chronic diarrhea refers to diarrhea that lasts for at least four weeks. It’s usually the result of an intestinal disease or disorder.