The baby did not poop for five or six days, may be related to functional constipation, digestive tract deformities and other factors, the main use of drugs, surgery and other ways of treatment. 1. Functional constipation: functional constipation is mainly caused by gastrointestinal dysfunction, pay attention to adjust the baby’s diet, feed more water, eat more fiber-rich foods, such as pumpkin, coarse grains and so on. If necessary, you can give the baby the use of drugs to regulate intestinal flora for relief, such as probiotics. 2. digestive malformation: digestive malformation is a congenital developmental abnormality, is a birth defect, more common esophageal atresia, jejunal atresia, congenital megacolon, etc., in the treatment of the main surgical treatment. The baby did not poop for five or six days, there may be other reasons, it is recommended to the hospital in a timely manner to carry out relevant examinations, clear causes of the active symptomatic treatment, in addition to note that the above drugs are recommended to be taken under the guidance of a doctor, can not be used on their own.