One-month-old babies who do not poop for three days are usually caused by indigestion, constipation and other reasons. Common treatments include general treatment, medication or surgical treatment, etc., and different treatment programs need to be chosen according to the different causes. 1. General treatment: Avoid washing the rectum with soap solution or pure water. Abdominal massage, proper exercise and drinking more water can be used to help relieve the problem. If necessary, corkscrew can be used to soften the stool and promote fecal discharge, but it cannot be used for a long time. 2. Medication: (1) laxatives: laxatives can increase the amount of colonic content through osmosis, improve stool properties, and stimulate intestinal peristalsis, so that defecation is accelerated and smooth, can be used for the treatment of functional constipation in babies, commonly used drugs for lactulose. (2) Micro-ecological agents: micro-ecological agents can increase intestinal peristalsis and regulate intestinal flora imbalance to improve the symptoms of functional constipation in babies, and commonly used drugs are Bifidobacterium trichoderma. 3. Surgical treatment: if the baby’s constipation is caused by congenital megacolon, congenital anorectal malformation, spinal embolism, spinal bulge and other organic lesions, surgery should be actively carried out. Parents should follow the doctor’s instructions to actively cooperate with the doctor for the treatment of the baby, do not blindly treat yourself, so as not to delay the condition or adverse reactions. The above medications should be used in accordance with medical advice.