Diarrhea is a disease in which the stool or feces turns into mushy or liquid which usually happens at least three times in 24 hours. In developing countries, diarrhea is the most common cause of infant mortality, and also kills more than 2.6 million people annually. Diarrhea is not a disease that comes by itself. Usually there is a trigger, below are some causes of diarrhea:Infection by bacteria,