Redness around the anus with pain is seen in the following two diseases: first, perianal abscess, especially superficial abscesses, which have obvious redness, swelling, heat and pain, and the patient also has fever, and the symptoms are aggravated during defecation, and the most effective way is to perform surgical incision and drainage. Deep abscesses with less obvious signs and chills and high fever also require surgery and are mainly caused by soft tissue infection or recurrent chronic inflammation of the anal sinus and secondary infection. The surgery should be detailed to find adequate drainage of the internal orifice, and postoperative anti-infective treatment of the veins is also required, with regular changes of medication. Second, seen in perianal hemorrhoids, especially thrombosed external hemorrhoids, will manifest as a dark purple swelling in the anus with high tension and significant pain, the acute phase can also choose surgery to remove the embolus, during surgery to keep bowel movements regular and unobstructed, pay attention to local hygiene.