The specific reasons why infants do not poop are as follows: First, parents give infants less water to drink, it is not easy to promote gastrointestinal peristalsis, will not poop. Second, if the child adds complementary food fruit and vegetable intake is relatively small, it is not easy to promote gastrointestinal peristalsis, also easy not to poop. Three, when the infant has indigestion, resulting in constipation, there will also be the case of not poop. Infants in a state of disease due to poor gastrointestinal motility, but also due to drug-induced intestinal flora imbalance, there will also be no stool situation. If the infant is accompanied by surgical diseases, such as intestinal obstruction or intussusception, there will also be the situation of not pooping. Sixth, if the infant has a past history of constipation, the child has perianal difficulties, perianal pain and other discomfort when defecating, there will be the phenomenon of holding stool, but also will not poop.