If it is indigestion caused by the baby long-term green stools need to change milk powder, if it is caused by cold and other reasons, do not need to change milk powder. 1. need to change the milk powder: if the baby milk powder is not suitable will appear indigestion, this time the intestinal peristalsis will be accelerated, food in the intestinal stay time will become shorter, the digestive tract secretion of the bile has not been turned into bilirubin is discharged, so there will be the symptoms of green stools, this case should be changed, you can choose to easy to digest the milk powder. 2. do not need to change the milk powder: cold will also cause green stools, cold after the intestinal probiotics will reduce harmful bacteria will increase, intestinal flora imbalance, will cause damage to the intestinal mucosa, diarrhea symptoms, in addition to the stool will become green, this situation and milk powder is not related to the milk powder, do not need to change the milk powder, need to pay attention to the abdominal warmth, the need for the use of drugs. The baby long-term green stool, need to go to the hospital by the doctor to clarify the cause, the doctor for different reasons for treatment.