Pain between the anus and tailbone may be related to trauma, skin ulcers, perianal diseases, and underdeveloped gluteus maximus. 1. Trauma: If the patient’s tailbone area is hit by an external force, resulting in a fracture or bone crack in the area, the bone bends forward and may puncture or puncture the anorectum, causing pain. It needs to be treated by fracture restoration surgery, etc. As the condition improves, the pain will gradually recover. 2. Skin ulcers: If the patient has perianal eczema, repeated scratching will cause the skin in the area to break down and ooze, resulting in itching and pain. If the patient has folliculitis, it will also cause pain. Perianal eczema can be treated with loratadine, cetirizine hydrochloride, etc. Folliculitis can be coated with erythromycin ointment and other drugs. 3. Perianal diseases: If the patient has perianal abscess, anal fistula, hemorrhoids and other perianal diseases, usually there will be meatballs in the anal area, and in severe cases, pain will occur. Perianal abscess needs timely use of surgery to clean up the abscess area; anal fistula needs to be treated by hanging thread treatment and other methods; hemorrhoids can be oral hemorrhoid fasting tablets, external peeling and internal ligation and other surgical treatments. 4. gluteus maximus underdeveloped: if the patient is relatively thin, or gluteus maximus underdeveloped, when sitting down, the gluteus maximus muscle is difficult to support the patient’s body, or the tip of the tailbone falls on the bench, the area will appear pain. Body fat content can be increased, and when sitting on the bench, the body can be leaned forward to reduce the pressure. Due to the number of causes, patients should seek medical attention, systematically examine the differential diagnosis based on their symptoms, and follow the doctor’s instructions for treatment.