Polypoid lesions are swellings formed by elevation of the mucous membranes and usually occur in organs with mucous membranes. A polypoid lesion is a long, strip-like swelling that protrudes from the lumen or protrudes from the surface of the body, either in the intestine or on the surface of the body. In the intestines, especially near the stomach or colon, the hollow organs can be visualized for polypoid lesions by gastroscopy and enteroscopy. The pathogenesis and etiology of polypoid lesions are not well understood, but most believe that they are closely related to repeated localized inflammatory stimuli. Common clinical symptoms include digestive symptoms such as abdominal pain and diarrhea. Although most polypoid lesions are benign, they may progress to malignancy if not treated properly, and gastrointestinal polyps may bleed. Under the stimulation of food or feces, the mucous membrane on the surface of the polyp may be damaged and bleed. Also, repeated damage and bleeding can stimulate polyps to become cancerous. Patients with symptoms of polypoid lesions are advised to go to the hospital for relevant examinations in time and be treated actively under the advice of the doctor.