Diarrhea is referred to the frequent loose bowel movements due to abnormal condition of the intestines. This is not a disease, rather, it is a symptom of a digestive disorder. There are two forms of diarrhea: one is acute diarrhea, and the other one is chronic diarrhea. In general, acute diarrhea subsides after a few days or a week, but chronic diarrhea continues to bother the patient for several weeks, months, and sometimes, years. For this reason, chronic diarrhea is often referred to as constant diarrhea or persistent diarrhea.