Children who do not poop for three days are usually considered to have functional constipation and need daily life guidance, oral medication, topical corkscrew and other interventions. 1. Daily life guidance: pay attention to reasonable diet, increase the intake of dietary fiber as much as the digestive tract can tolerate, and pay attention to appropriate exercise and adequate water intake. Develop regular defecation habits, such as regular defecation, limited time defecation. 2. Oral medication: Oral microecological preparations (e.g. Clostridium Typhimurium) can be used to regulate the intestinal flora, and laxatives (e.g. Lactulose Oral Liquid) can be used, which can retain the water in the lumen of the colon, soften the fecal matter, and alleviate the symptoms of constipation. 3. Local use of corkscrew: such as anal use of corkscrew, can lubricate the intestinal wall, so that the stool can be easily discharged, for the above babies, or the existence of defecation difficulties can be used as appropriate, need to pay attention to the use of the process of gentle movements, do not use frequently, so as not to produce dependence. All of the above drugs should be used under the guidance of a physician, and it is recommended to actively seek medical advice and treatment from a specialist.