Children with blood in the buttocks during bowel movement may be caused by anal fissure, enteritis, dysentery, intussusception and other diseases. 1. Anal fissure: children in constipation or dry stools, encountered when the stool too much force, may cause anal fissure and bleeding, and for the blood, because the anal pain children will cry. 2. Children suffering from enteritis or dysentery: it can also cause children to increase the number of stools, stools with blood phenomenon. 3. Intussusception: when a child suffers from intussusception, in addition to paroxysmal abdominal pain and crying, intestinal distension will also have blood in the stool. Usually pay attention to the child’s diet, eat less barbecue food, eat more fresh vegetables and fruits, avoid constipation. Children with blood in the buttocks during bowel movements are also seen in other causes, need to pay close attention to, timely visit the hospital, the professional doctor to give relevant examinations, such as pediatric enteroscopy, a clear diagnosis, for the cause of the treatment, so as not to delay the condition.