The patient has small lumps of pain 5 months after perianal abscess surgery, which may be caused by surgical scar hyperplasia, postoperative residual abscess, hemorrhoids and other reasons. 1. Surgical scar hyperplasia: As perianal abscess is an infectious disease, it needs to be treated by surgery, when the surgical healing process heals poorly, resulting in the formation of scar tissue. When the scar tissue is inflamed and proliferates, it may cause keloid with pain, itching and other uncomfortable symptoms. 2. Post-operative residual abscess: If small bumps with pain and other discomforts appear after the perianal abscess surgery, it may be due to the abscess is not completely removed during the surgery, so that the pus cavity remains due to the need for a second surgery for excision treatment. 3. Hemorrhoids: when patients with perianal abscess surgery, the anal area of thrombosed hemorrhoids, may cause small bumps, pain, itching and other symptoms. It is recommended that patients seek medical examination in a timely manner, clear causes for targeted treatment to avoid aggravation of the condition; in life, pay attention to personal hygiene, keep the perianal area clean and dry, but also pay attention to the observation of the affected area, regular review, etc..