Children do not poop is usually caused by eating less, drinking less water, dietary structure is not reasonable and other physiological reasons, as well as dyspepsia, intestinal obstruction and other pathological reasons. 1. Physiological reasons: if the child recently eat less or the weather is hot sweating and drinking less water, it may lead to the emergence of the situation of not pooping, in addition, if the child into the food is too fine, or there is not enough food fiber and other circumstances may also lead to the emergence of the situation of not pooping. 2. Pathological reasons: due to improper diet, improper care and other causes of indigestion may also make children appear not pooping; due to gastrointestinal dysfunction, intestinal inflammation, intestinal developmental abnormalities caused by intestinal obstruction and other pathological conditions may also make children appear not pooping. There may be other reasons why children do not poop, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.