Diarrhea is an increase in the frequency of bowel movements or a decrease in the form of stool (greater looseness of stool). The loose-stool consistency that characterizes diarrhea usually lasts a few days at most. Diarrhea often means more-frequent trips to the toilet and a greater volume of stool.

Diarrhea is an increase in the frequency of bowel movements or a decrease in the form of stool (greater looseness of stool). The loose-stool consistency that characterizes diarrhea usually lasts a few days at most. Diarrhea often means more-frequent trips to the toilet and a greater volume of stool.