Common causes of stool bleeding in children include dry stool, anal fistula and acute enteritis. 1. Dry stool: some children have the habit of picky eating, do not like to drink water, resulting in dry stool, defecation easily lead to rectal mucosa rupture, bleeding stool. 2. anal fistula: some young children are prone to anal fistula when there is an abscess or inflammation on the edge of the anus leading to fissure. There will be strong pain during defecation, and anal blood dripping attached to the stool. 3. Acute enteritis” after the child’s intestinal tract is infected by bacteria, viruses, will lead to intestinal mucosa congestion, edema, rupture, part of the blood can be discharged with the stool, often manifested as black stool. 4. Others: Due to the weak intestinal function and imperfect development of the mesentery in infants and young children, organic lesions such as intussusception and intestinal polyps may occur, which may also lead to children with blood in stools. There are many other causes of bleeding stools in children, and it is best to go to a specialized hospital in time. After a clear diagnosis, follow the doctor’s instructions for treatment.