Perianal abscess has a new pus cavity in January after surgery, which may be related to the wound not healing, pseudo-healing, and disease recurrence. 1. The wound is not healed: perianal abscess can be treated by incision and drainage, the treatment process does not pay attention to the wound wound wound dressing cleaning, the wound may appear secretion and necrotic tissue, resulting in poor wound healing. 2. False healing: in the process of wound recovery after perianal abscess surgery, if the wound wound heals externally and becomes empty internally, false healing may be formed, and the wound site will also show pus flow. 3. Disease recurrence: perianal abscess location is high, after the operation is not clear thoroughly, resulting in local pus cavity is not closed completely, can cause postoperative recurrence, may produce new pus cavity. Perianal abscess one month after surgery and new pus cavity, it is recommended to pay attention to, as soon as possible to the hospital anorectal department to give treatment, or review under the guidance of the doctor on the local clearance treatment.