Children not pooping for 4 days may be caused by insufficient diet, intestinal obstruction, constipation and other reasons, which can be treated by medication, surgery, psychology and other treatments under the guidance of the doctor. 1. Inadequate diet: when the child eats too little, the liquid is absorbed after digestion and the residual residue is less, resulting in reduced and thickened stools, which can make the stools dry. It can be improved by increasing the amount of food and drinking water appropriately. 2. Intestinal obstruction: Children who do not poop for 4 days may be caused by intestinal obstruction. If it is dynamic intestinal obstruction, conservative treatment, including fasting, gastrointestinal decompression, rehydration, nutritional support, etc. If it is mechanical complete intestinal obstruction, especially strangulated intestinal obstruction, surgery is required. 3. Constipation: It can also make the child not poop for 4 days. It can be relieved by eating more celery, bananas, pears and other foods with more dietary fiber, or performing bowel training. Probiotics such as Clostridium Typhimurium and Bacillus subtilis can also be used under doctor’s supervision to regulate the intestinal flora and improve intestinal function; if necessary, lactulose and keserol can be used to assist in defecation. All of the above drugs should be used under the guidance of a doctor to avoid self-medication. There are many other reasons why children do not poop for 4 days, it is recommended to consult a doctor in time to be evaluated and handled by a specialist, so as not to delay the condition.