Swelling sensation in the wound one month after surgery for perianal abscess may be caused by wound abscess encapsulation, inflammation stimulation, etc. It should be examined and then punctured and drained, treated with antibiotics or surgically treated. After perianal abscess surgery, patients will have discomfort during the incision healing period, such as pain will last for a long time, such as one month after the operation still feel the swelling and pain at the incision is obvious, it may be the abscess incision in the process of healing, drainage is not good, the superficial tissue is healing well, the deeper tissues are not completely healed, the formation of abscess parcels, caused by swelling. The perianal abscess feels swollen for more than a month after the operation, which may also be caused by incomplete postoperative care and dressing change, poor defecation, etc., so that the wound heals poorly and local secondary infections. Through the perianal swelling ultrasound examination, routine blood tests, etc., to clarify whether the incision is deep abscess and infection, etc., should be given anti-infective treatment, such as systemic antibiotics such as cefixime, levofloxacin and other treatments. If necessary, puncture, drainage, and pay attention to the use of warm water sitz bath, to ensure that the perianal clean, such as swelling is serious, surgical incision treatment. Perianal abscess after surgery more than a month of obvious discomfort, need to consult a doctor in a timely manner to clarify the cause of the disease, as soon as possible to give treatment, do not self-medication, to avoid delays in the condition.