Baby a week without defecation is generally constipation or congenital megacolon, intestinal obstruction, etc., should be promptly consulted to identify the cause of the disease, the main treatment methods are general treatment, drug treatment, surgical treatment, etc. Baby a week without defecation may be insufficient food, add improper supplemental food caused by functional constipation, parents according to the specific circumstances of the appropriate increase in the amount of food or adjust the supplemental food, etc., can be clockwise massage of the abdomen, to promote intestinal peristalsis. If necessary, the use of laxatives (lactulose, etc.), microecological agents (such as bifidobacteria triple live bacterial powder), as prescribed by the doctor, to relieve constipation. If the baby does not have bowel movement for a week due to congenital megacolon, the treatment is mostly based on surgery. Conservative treatment, such as colonic irrigation, can be adopted for children whose diagnosis is not certain. If the organic constipation is caused by intestinal obstruction, dietary abstinence is required, gastrointestinal decompression is carried out if necessary, and antibiotic treatment is carried out against gram-positive bacteria and anaerobic bacteria in the intestine to prevent infection. Severe cases also require surgical treatment, such as intestinal port or intestinal externalization, intestinal resection and intestinal anastomosis. There may be other reasons why the baby does not have bowel movement for a week, parents should pay attention to it, consult the doctor in time, follow the doctor’s advice to check, and then carry out the appropriate treatment.