If an infant has a bowel movement once every two or three days, either normally or abnormally, it is necessary to observe the nature of the infant’s stool and its defecation. If an infant has a stool once every two or three days, but the stool is in good shape and is not difficult to pass, and there are no abnormalities in the infant’s diet, this is sometimes normal. However, if the infant has a stool once every two or three days, the stool is particularly dry and hard, and defecation is difficult, and the infant will have obvious abdominal flatulence and defecation difficulties, etc., this is abnormal performance, also known as constipation. First, the normal situation: infant digestive function is not very well developed, some infants in the process of digestive system development, there may be a three-day stool phenomenon, good stool properties, does not affect the infant’s normal diet, eating and the same as usual, belongs to the normal state. Some infants may be six or seven days to poop once, is also a normal phenomenon, is often referred to as “save tummy”, as the baby’s digestive function gradually improve, this situation will gradually reduce. Second, the abnormal situation: 1, functional constipation: functional constipation is mostly related to infant diet, some infants eat milk powder or improperly added supplementary food, may cause dietary fiber content less, easy to cause constipation phenomenon. You can properly add some probiotics to infants to increase intestinal flora and relieve constipation. Some infants are allergic to dairy foods, which may cause constipation, and need to avoid possible allergens; 2, organic constipation: infants with constipation from birth, pay attention to some congenital diseases, such as congenital megacolon or thyroid function abnormalities, may cause infants to have a two or three day stool phenomenon. This is organic constipation, an abnormal phenomenon that requires timely treatment to relieve.