Rectum can be directly removed, especially rectal cancer patients can remove rectum through surgery, after surgery, some reasons will lead to the emergence of sequelae, in the digestive system rectum has a particularly important physiological function. In the digestive system, the rectum has a particularly important physiological function. The rectum is able to store stools, and is also an important channel for the human body to discharge stools, in which the human body ingests food to be digested and absorbed to form feces, and the rectal area will make the person feel the urge to have a bowel movement, and the patient can consider surgical resection in case of rectal diseases, which include rectal cancer or proctitis, and prolapsed mucosa of the rectum, and so on. For simple partial rectal resection does not bring too much harm to the patient, the main cause of harm is radical rectal cancer surgery, due to the operation will damage the nerves of the pelvic floor, after the operation patients are prone to urinary retention or sexual dysfunction.