Colon polyps are a common pediatric disease and one of the main causes of pediatric blood in the stool. The incidence is about 1% in preschool and school age, mostly occurs in 1~6 years old, more in boys than girls. Clinical manifestations:The main manifestations are painless recurrent blood in stool, a few of them are swelling discharge and pus-blood stool after stool, abdominal pain. The vast majority of polyps are located in the rectum and sigmoid colon, accounting for about 90%. Bleeding intestinal polyps are associated with ulcers on their surface. The size of polyps is usually 1~1.5 cm, rarely more than 3 cm, mainly solitary, and pathological examination shows that they are mostly juvenile polyps, mostly misshapen tumors, which may be caused by inflammation. Most of them are benign, but malignancy has been reported in very few cases. Ancillary tests: barium enema, abdominal ultrasound (can be done in experienced specialized children’s hospitals), colonoscopy. Treatment: Colonoscopic polypectomy. Colonoscopy revealed polyps with tips and surface ulcers After removal, the polyps were ischemic and necrotic Abdominal ultrasound suggested sigmoid colon polyps