The causes of perianal swelling are as follows: 1. tumor factors: one of the main factors of perianal swelling; 2. inflammatory factors: such as inflammation or ulceration around the anal canal, anus, and rectum; 3. other pathological factors: such as relaxation or endocele of the rectal mucosa, prerectal bulge, perineal descent, pelvic floor hernia, pelvic floor muscle spasm, myometrium endometriosis, uterine prolapse, bladder prolapse, etc.; 4. psychological factors: some patients examined No pathological hints, may be a psychological effect, generally need to be combined with anti-anxiety drugs for treatment. The specific medication should be combined with clinical and guided by the doctor’s interview.