Tummy is a common term for the improvement of digestive function in infants, and the difference between constipation and tummy is that the high incidence of different ages, different causes, different symptoms, different hazards, and different treatment methods. 1. Different age of high incidence: Tummy is usually found in infants and young children before adding complementary foods; constipation can occur at any age. 2. Different causes: Tummy saving is usually caused by the gradual enhancement of the baby’s gastrointestinal function, leaving less residue after food is absorbed; constipation may be caused by indigestion, intestinal flora imbalance, and too little exercise. 3. Symptoms are different: stomach saving is just a long time between stools, diet, sleep, mental state is not abnormal; constipation can be manifested as abdominal distension, abdominal pain, nausea, vomiting, discharge of dry feces, defecation effort and other symptoms. 4. Different treatment methods: stomach saving is a normal performance, usually do not need treatment; constipation needs to be treated according to the cause of the disease.