Newborns 4 days do not poop need to be discussed in different situations, if the newborn did not discharge meconium, 4 days do not poop, then need to rule out the anal atresia, if the newborn has been discharged meconium, 4 days do not poop, it may be due to the baby to breast milk digestion and absorption is better, but also need to consider congenital megacolon and other conditions. 1. anal atresia: anal atresia children can not expel meconium, so there will be newborns 4 days without poop symptoms, the child will also have abdominal distension, vomiting and other symptoms, parents need to pay attention to timely take the baby to the hospital for anoplasty to treat. 2. Physiological factors: if the baby has been discharged meconium, and then the symptoms of newborn 4 days without poop, if the baby has a good appetite, no vomiting, crying and irritability and other symptoms, then it may be due to the baby’s absorption of breast milk is better resulting in a normal phenomenon, do not need to worry. 3. Congenital megacolon: if the baby has already discharged meconium, and then appeared newborn 4 days without poop symptoms, and accompanied by vomiting, constipation, feeding difficulties and other manifestations, then we need to consider the possibility of congenital megacolon, this situation requires surgical resection of intestinal segments without ganglionic cells and part of the dilated colon, the need to pay attention to the child’s nutritional support during the period. After eliminating physiological factors, if the newborn’s symptoms of no poop for 4 days continue unabated, it is recommended to consult a doctor to find out the cause and ask the doctor to take care of it.