For 6-month-old babies who do not have bowel movements for a week, functional constipation is most commonly seen, which can be treated with medication as prescribed by the doctor. However, we also need to be alert to the possibility of congenital megacolon, if the diagnosis is clear, surgery may be required for treatment. For 6 months old baby a week without stool, the vast majority of cases belong to the functional constipation, treatment can be the first need to use Kaiser Permanente anus, so that the discharge of stools, and at the same time to be prescribed to the intestinal micro-ecological agents, such as clostridium casei bacterial live bulk helps to restore the intestinal flora. If the baby is not stool for a long time, or repeated constipation need to be alert to congenital megacolon may be, this kind of baby can appear a week without the phenomenon of bowel movement, daily often stubborn constipation, defecation difficulties, etc., serious malnutrition can occur, abdominal plain film examination can help to assist in the diagnosis. Treatment may include the temporary use of corkscrews to relieve constipation and surgical intervention by a physician. All of the above medications need to be evaluated by a physician, and it is recommended to actively seek medical attention from a specialist to determine the cause of the constipation and guide intervention.