Baby three days without stool can be seen in physiological phenomena, constipation and other conditions, the treatment needs to be decided according to the cause, such as the existence of constipation need to be given discretionary treatment, such as Keserol. 1. physiological phenomenon: for the previous relatively long interval between defecation, such as every 2 days or so to relieve the baby of the above phenomenon, and no bowel dryness affect defecation, its general mental health, no abdominal discomfort and other symptoms, can be temporarily considered normal physiological phenomena, need to continue to observe, for the baby has been added to complementary foods can increase the intake of dietary fiber. 2. constipation: for the previous 1~2 times a day to relieve the baby, the above phenomenon, there may be constipation, some babies may have difficulty in defecation and other phenomena. For treatment, it is necessary to use medicines such as Keserol, which is easy to pass stools, and at the same time, it can be treated with medicines such as Clostridium Typhimurium or Lactulose. These medications should be used under the supervision of a physician, and it is recommended that the baby be seen by a specialist for evaluation and intervention if necessary.