The baby’s milk is cold or the baby’s abdomen or feet are cold, it is possible to pull out watery or paste-like blue stools. There may be the following reasons for the blue stool: 1, the baby may have overflowed milk and blue stool after catching a cold, the laboratory tests are normal, consider the baby indigestion or abdominal cold related. 2, baby hunger state, intestinal peristalsis too fast, so that the intestinal bilirubin has not yet converted, from the stool, the stool may be cyan. 3, high iron-containing formula or oral iron supplementation drugs for babies, can not fully absorb iron, the stool appears yellow-green or cyan, stop the drug for a few days that the normal stool color. 4, the baby added green vegetables, stools are often green. This is a normal situation, and eating related. 5, breastfeeding simply green stool, no other accompanying symptoms, also known as hunger diarrhea, that is, the baby eat to the front milk is thin, containing protein water, used to quench thirst, after the milk contains more fat. The appearance of green stools, parents should not panic, observe the baby’s recent diet and mental, weight situation, adjust feeding methods, stools soon become normal color.