Clinically, according to the volume and size of rectal polyps and whether the polyps are cancerous or not, different clinical symptoms can be exhibited. First, if the volume of rectal polyps is small, the polyp surface is smooth and there is no obvious erosion. At this time, the patient can only show positive occult blood in the stool, and there is no obvious clinical symptoms such as abdominal pain and bloating. Second, if the patient’s rectal polyps are larger, causing the blockage of the intestine, can cause anal exhaustion, defecation stop, patients appear abdominal pain, abdominal distension and other symptoms of intestinal obstruction. Third, if the surface of the rectal polyp is accompanied by erosion, ulceration or even cancer, the polyp can cause perforation of the intestinal wall, and the feces in the intestinal canal penetrate into the abdominal cavity, which can cause the symptoms of acute abdominal disease of diffuse peritonitis. Clinically, once a polyp has obvious clinical symptoms, patients are recommended to undergo surgery.