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.

Acute diarrhea, which lasts from two days to two weeks, is typically caused by a bacterial, viral or parasitic infection of some sort.

Chronic diarrhea persists longer than does acute diarrhea, generally longer than four weeks. Chronic diarrhea can indicate a serious disorder, such as ulcerative colitis or Crohn's disease, or a less serious condition, such as irritable bowel syndrome.

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Jan. 11, 2018