Three months old baby, under normal circumstances, the stool should be light yellow, if the baby always green stool to be treated according to the specific circumstances, usually pay attention to the following situations: a. If the green stool for a long time, accompanied by other clinical symptoms, such as decreased appetite, thin stools, poor digestion, usually can take oral probiotics to regulate the gastrointestinal function, such as bifidobacterium, yeast boulardium, etc. can be. Second, if the baby’s nutritional status is poor, may consider the baby’s spleen and stomach function is weak, poor digestive function caused by, can take appropriate Chinese medicine, such as infant spleen San, etc.. Third, if the baby does not have any clinical signs and symptoms except green stools, it may be caused by adding milk powder containing iron fortification, which does not need to be dealt with at this time.