Non-infectious (catarrhal) diarrhoea is such a common condition that everyone has had it at some time or another. However, generalized diarrhoea (particularly infectious forms) is the chief symptom of several serious diseases and is a major cause of death in the world.
Diarrhoea is a change in a normal stool pattern in which the stool becomes more frequent and less formed, sometimes fluid. It can occur by itself or along with abdominal cramps, bloating, nausea, vomiting and fever. When diarrhoea occurs, the normal function of the intestine is disrupted. Instead of absorbing fluids and nutrients from the material passing through, it reverses that process and secretes body fluids back into itself and passes them out of the body.