<unk>  is a rare condition that happens usually to infants, young children and sometimes adults make them to have several diarrhea and sometimes so much that the children need intravenous fluids.  Food and vitamins are also be effected because the body attacks to the own intestinal wall, irritating the lining of the intestine.  Sometimes it attacks to others places as thyroid or others glands in the body or kidneys.
Autoimmune enteropathy
Tropical sprue
Celiac disease
Allergic colitis
Inflammatory bowel disease
Schnitzler syndrome
Drug-induced colitis
Irritable bowel syndrome