Newborns 3 days do not poop for physiological reasons, more without treatment; if congenital anus, congenital megacolon and other diseases, can be conservative or surgical treatment; if constipation, the need for targeted treatment. 1. Physiological reasons: if the baby recently ate milk digestion is not good or not do a good job to keep warm and other measures, may also lead to newborns do not poop for 3 days, most of the normal phenomenon, generally do not need special treatment. 2. Pathological causes (1) Congenital anus: if the newborn does not poop for a long time, it may also be related to congenital diseases, such as congenital anus, should be treated as soon as possible surgery, the main point of treatment is to rebuild the normal anus opening, and to preserve its self-control of bowel movement. (2) Congenital megacolon: If a newborn suffers from congenital megacolon, it will cause the affected intestines to be unable to peristalsis like normal intestines, and there will also be the case of not pooping. Conservative treatment can be carried out first, and then radical surgical treatment can be carried out, and the appropriate program should be selected under the guidance of the doctor. (3) Constipation: If a newborn baby is constipated, appropriate treatment is needed according to the cause. If for organic constipation, first of all to treat the newborn’s primary disease; if for functional constipation, generally need comprehensive treatment, such as giving abdominal massage, warmth and so on. As you can see, there are many reasons why newborns don’t poop for 3 days, and if the newborns also have other symptoms such as vomiting and not pooping for a long time, they need to consult a doctor in time to clarify the cause of the disease. And then under the guidance of the doctor for treatment.