Full-month baby pull green stool can be seen in physiological phenomena, pathological conditions (such as infectious diarrhea disease, lactose intolerance, etc.), specific need to be combined with the baby’s condition specific analysis and judgment. 1. physiological phenomenon: the color of the baby’s stool and the chemical changes in the bile contained in the feces, for breastfed babies, the stool is acidic, under the action of oxidizing bacteria, can be oxidized to bilirubin, so that the stool is slightly green, this kind of babies have no obvious abnormalities, is a normal physiological phenomenon. 2.Pathology (1) infectious diarrhea disease: caused by viral or bacterial infections, there is a significant increase in the number of stools or a significant change in the nature of such babies due to increased intestinal peristalsis, green stools, need to be actively consulted for treatment. (2) lactose intolerance: due to various reasons caused by lactase enzyme in the intestinal tract absolute or relative insufficiency, can not well metabolize the lactose of the food, there can be intestinal peristalsis increase to solve the situation of loose stool, green stool, serious cases can affect the weight gain. In addition, there are other causes of such symptoms, it is recommended to consult a specialist as soon as possible to determine the cause of the symptoms and to carry out targeted treatment.