The common causes of a lump of flesh at the patient’s anal opening are the following: 1. thrombosed external hemorrhoids, most often seen in patients with long-term hemorrhoids, due to the blockage of local blood vessels, and with the protrusion of the nucleus pulposus, will be accompanied by a mass at the anal opening, the patient will be accompanied by severe pain symptoms, it is recommended that surgery be performed as soon as possible to remove the nucleus pulposus, stripping the internal thrombus can effectively improve the local pain and discomfort. 2. rectal polyps The protrusion of rectal polyps, mostly seen in the low rectal mucosa polyps protruding from the body surface, may not have obvious pain symptoms, due to the protrusion of rectal polyps, easy to cause recurrent blood in the stool, it is recommended that patients can perform endoscopic polypectomy, less trauma, faster recovery after surgery. 3, patients with malignant tumors in the anal canal, also in the anal canal with tumor hyperplasia, it is recommended that patients as soon as possible to perform radical treatment of malignant tumors, most patients need to remove the anus Most patients need to remove the anus and establish artificial anus.