The first consideration for bleeding in stool in children is rectal polyps, which is the most common cause of blood in stool in children. This kind of blood in stool usually occurs once every few days, the color of blood in stool is bright red, is dripping blood or hand paper stained blood, the child has no abdominal pain, and there is no anal pain during bowel movement. Most of the polyps in children have a tip. If the tip of the polyp is long and in a low position, the polyp can be detached to the outside of the anus during bowel movement. Examination method: let the child do a hard bowel movement to see if there is any prolapse in the anus, the doctor can sometimes touch the polyp with anal finger test, colonoscopy can observe the shape, size and location of the polyp. Treatment: For polyps that can be detached from the anus, they can be directly ligated with surgical wires; for polyps that are high enough to be detached from the anus, they can be ligated under anesthesia or directly ligated and electrocuted under colonoscopy. Secondly, anal fissure, this kind of blood in the stool is bright red blood, hand paper stained blood, even when the blood drops, usually in the stool is more serious when dry, in addition to blood in the stool will also be accompanied by anal pain, defecation difficulties, fear of defecation, older children will say that anal pain in the stool, the age of the younger or infants and young children will be in the stool when crying. Examination method: the stool is dry, when pulling the anal canal, you can see a small fissure at the anal canal, the color is reddish or purplish, and the pressure pain is obvious. Treatment: topical medication wash, sitz bath (generally use Chinese medicine, the effect is good, but also safe), ointment external coating, pessary anal, but also to adjust the dietary structure, to keep the stools soft and unobstructed.