The reason for this is that the formula milk is generally filled with a certain amount of iron, which is not digested and absorbed by the digestive tract and appears dark green. If the baby supplemental food to add dark green vegetables, such as spinach, etc., will also appear green stool phenomenon, no need to deal with, stop eating can disappear; 2, physiological factors: infants and young children’s gastrointestinal function is not well developed, bile pigments are not fully transformed into yellow biliverdin out of the body, oxidation into green biliverdin, thus appearing green stool phenomenon, belongs to the normal situation, no special treatment; 3. Indigestion: cold or improper diet can lead to indigestion, indigestion in children can also lead to green stools. Pay attention to abdominal warmth and avoid getting cold. If you are breastfeeding, the mother’s diet also needs to try to avoid cold, greasy, indigestible diet. In this case, you can give the child oral probiotic preparations, such as Bacillus subtilis dibacterium particles, to regulate the intestinal flora, can relieve the green stool; 4, lactose intolerance, cow’s milk protein allergy: baby lactose intolerance or cow’s milk protein allergy, may also appear green stool, lactose intolerance is recommended to reduce lactose intake, cow’s milk protein allergy can be applied to hydrolyzed formula or amino acid milk powder Avoid eating foods containing cow’s milk on a daily basis. In addition, some inflammatory diseases of the gastrointestinal tract may also cause green stools in children. Therefore, when this phenomenon occurs, parents should observe whether there are other abnormalities, such as with mucus, and need to promptly go to the hospital for stool routine, blood routine, and other clinical examinations to investigate the cause and then actively treat.