Infants 2 days no poop may be normal, but also need to be based on the specific circumstances of the baby to rule out whether there is constipation, intestinal obstruction and other pathological factors. 1. Physiological phenomenon: infant gastrointestinal function is not perfect, easy to appear irregular defecation, can be two to three days stool once, if the stool properties are not abnormal, the baby’s mental state, good diet, that is normal, do not need to be treated, pay attention to adjust the child’s diet, drink more water, eat more food rich in dietary fiber. 2. Pathological factors: observe the baby defecation, if more than three days without defecation, dry stool, defecation difficulties, belongs to constipation, according to the cause of the functional constipation, need to give abdominal massage, dietary adjustments to improve; organic constipation, such as congenital megacolon, intussusception, intestinal obstruction, etc., need to consult a doctor in a timely manner, give medication, surgery, and other symptomatic treatment. Parents are advised to consult the doctor when their babies do not have bowel movement for 2 days to avoid delaying the condition.