Children with blood in stool may be caused by intestinal bacterial infection, hemorrhoids, intussusception and so on. 1. Intestinal bacterial infection: if the child has a history of unclean diet, leading to bacterial invasion of the intestinal mucosa, causing intestinal damage, which may lead to blood in the child’s stool. 2. Hemorrhoids: If the child eats less vegetables and fruits or drinks less water in daily life, resulting in dry stools, this may cause hemorrhoids in the long run, which may lead to blood in the child’s stools. 3. Intussusception: It may be that the child’s intestinal peristalsis rhythm is disturbed, resulting in intestinal tubes being pushed into the neighboring intestinal lumen, leading to the child to have blood in the stool, more often accompanied by paroxysmal abdominal pain, abdominal lumps and other symptoms. Children with blood in the stool may also be caused by other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or standardized treatment.