Diarrhea refers to a condition in which the patient has an increased urge to have a bowel movementDiarrhea, but is able to pass only watery stool. The condition may stem from a temporary disorder of the bowels, an infection, or some other type of illness. Patients with diarrhea experience frequent watery stools, and abdominal pain and cramping. Or some patients, marijuana may help ease the abdominal pain and settle the bowels.