In medicine, diarrhea, also spelled diarrhoea (see spelling differences), refers to frequent loose or liquid bowel movements. Although for many people diarrhea is merely unpleasant, diarrhea that's both acute and severe is a common cause of death in developing countries and a major cause of infant death worldwide. It is often due to gastroenteritis. Causes Diarrhea is most commonly caused by viral infections, parasites or bacterial toxins. In sanitary living conditions where there's ample food… (More on Diarrhea)