The incision does not need to be stitched after surgery for perianal abscess because it is itself an infectious and purulent disease, and no surgery for infectious diseases should be stitched. If stitched during the infected period, it can easily lead to re-infection, resulting in a recurrence of the disease and the need for a second operation. Perianal abscess grows around the anus, the incision is close to the anus, it is easy to be contaminated, if the suture wound is contaminated by stool, it is easy to cause re-infection of the wound, the drainage of perianal abscess after suture is not smooth, it is easy to lead to the formation of an anal fistula or re-infection, so the perianal abscess after surgery wound is generally not suture.