Rectal polyps that are more than 0.5cm in diameter are operated on. Rectal polyps are elevated lesions on the surface of the rectal mucosa. Non-neoplastic polyps are rarely cancerous, while neoplastic polyps have the risk of becoming cancerous. Generally, rectal polyps with a diameter of more than 0.5cm require surgery, but if the location of rectal polyps is deeper and wider at the base, they should be removed immediately by surgery regardless of their size. Generally small polyps can be removed by biopsy forceps, loopers or electrocoagulation under colonoscopy, while larger polyps need to be removed by endoscopic mucosal resection (EMR) or endoscopic submucosal dissection (ESD), and most of the polyps can be removed completely under colonoscopy. After polyp removal, fasting may be required for 1~3 days, after which you can take oral liquid with little residue, such as rice soup and milk, after which you will gradually transition to semi-liquid food, such as rotting noodles, porridge, etc., and finally return to normal diet. Specific rectal polyps how big to operate, the patient should go to the hospital, by the doctor according to the shape of rectal polyps, location, pathology, etc. to determine.