Anal prolapse refers to the downward displacement of the anal canal, rectum, or even the lower end of the sigmoid colon and prolapse outside the anus. The etiology has not been clearly defined, and there are two main doctrines: sliding hernia and intussusception, and the predisposing factors are persistently high intra-abdominal pressure (e.g., constipation), diarrhea, and pelvic anatomical problems (e.g., laxity of the perirectal fascia, and redundancy of the sigmoid colon). Anal prolapse can present with rectal prolapse, mucus stools, constipation, urgency, anal sacrococcygeal distension, fecal incontinence, and bleeding. Frequent anal prolapse will make the anal sphincter contract too much and be unable to close, mucus will flow out of the anus, making the anus in a moist state, if not treated for a long time, walking, coughing and other subtle movements will cause the swelling to prolapse out of the anus, and it is difficult to return to the original position. If the patient has the symptoms of anal prolapse, he should go to the hospital in time, ask the doctor to clarify the cause of the disease, and if necessary, carry out the corresponding treatment.