1. If the newborn is born soon after this situation may be due to congenital megacolon, congenital hypothyroidism, anal deformity, milk protein allergy and so on. 2. If the child has not had a bowel movement for 10 days, but the diet, the spirit of the child is okay, and again defecation is still not a struggle, then the current situation is to save the belly caused by the child, usually occurring in less than 6 months of age because of breast milk, digestion, absorption, formation of residue less caused by a physiological situation. 3. Digestion, absorption, the formation of less residue caused by this is a physiological situation. 3. can also be seen in the improper addition of complementary foods, intestinal flora imbalance caused by constipation.