Infants two or three days once the stool may be normal, but also need to rule out pathological factors, such as constipation and other causes, then you can give general treatment, medication, surgical treatment. 1. Physiological phenomenon: infant gastrointestinal function is not perfect, bowel movement is not regular, if the baby two or three days once stool, stool properties are normal, there is no difficulty in defecation, the baby’s spirit, diet and so on are normal, then it is a physiological phenomenon, do not need to be treated. 2. Pathological factors: If the baby’s stool is dry and difficult to defecate, it belongs to constipation. Need to clarify is functional constipation or organic constipation, if the functional constipation, can be adjusted through diet, abdominal massage, follow the doctor’s instructions oral pepsin and other drugs to help digestion and other ways to improve. If the organic constipation, most commonly seen in congenital megacolon, intestinal obstruction and other diseases, need to go to the hospital pediatrics, clear cause, give surgery and other symptomatic treatment. It is recommended that the baby two or three days stool once actively seek medical treatment to avoid adverse consequences.