There is no such thing as the most effective treatment for constipation in a 1-week-old child. Constipation may be caused by functional constipation, congenital megacolon, anal fissure, etc., and measures need to be taken according to the cause of the conditioning, and medication and surgical treatment will be carried out if necessary. 1. Functional constipation: If a 1-week-old child has mild functional constipation, you need to let the child develop a regular bowel habit, usually drink more water, diet can eat green vegetables, celery, bananas and other foods containing vitamins and dietary fiber. In addition, appropriate daily exercise, such as jogging, crawling and so on. Some patients can also use osmotic laxatives such as lactulose and polyethylene glycol as prescribed by the doctor, as well as microecological preparations such as bifidobacteria and lactobacilli. 2. Congenital megacolon: If it is congenital megacolon that causes constipation in 1-year-old children, it is necessary to follow the doctor’s instructions to use volumetric laxatives, corkscrew plugging the anus and other treatments. Some patients also need to take enterostomy, subtotal colectomy, total colectomy ileorectal anastomosis and other surgical treatment. 3. Anal fissure: 1 week old children with anal fissure can also cause constipation, patients need to use 1:5000 potassium permanganate solution sitz bath. In addition, patients need to follow the doctor’s instructions with lactulose, wheat fiber and other laxatives. Some patients also need to be treated with anal flap techniques and internal anal sphincterotomy. Constipation in 1-week-old children may also be caused by intestinal tumors, hypothyroidism, diabetes and other factors. It is recommended that parents need to take their children to the doctor for examination, and the doctor will treat the cause of the disease.