It is normal for infants not to have bowel movements for a day, but if they continue not to have bowel movements, we need to exclude pathological possibilities. Infant gastrointestinal function is not perfect, defecation is not regular, easy to be influenced by external factors, there may be 1 ~ 3 days once the stool, if the baby’s other conditions, such as mental state, diet, etc. are normal, that is a physiological phenomenon, do not need to deal with. If the baby a day without stool, accompanied by other discomforts such as crying and restlessness, poor diet, etc., may be due to indigestion, constipation, etc., parents can give abdominal massage, oral probiotics, such as Bacillus subtilis bacillus to regulate intestinal flora. If the baby continues to have no bowel movement, it is necessary to consult a doctor to clarify the cause of the problem. Parents are advised to consult a doctor when they find their babies in discomfort. Avoid delays.