Generally cause the baby stool green reasons mainly include the following situations: First, eat the milk powder is very special caused by the milk protein allergy, if belong to the milk protein allergy, often eat amino acid milk powder, after eating amino acid milk powder will cause stool green. Second, the intestinal peristalsis caused by too fast, if the abdomen is cold or suffering from enteritis, the abdomen is often intestinal peristalsis is significantly accelerated, the bile secretion of bile chlorophyll can not be quickly turned into bilirubin and thus discharged from the body resulting in green stools.