The itchy incision after perianal abscess surgery is caused by two reasons. The first reason is that after the surgery of perianal abscess, there will be one or several relatively large incisions, and a week after the surgery, the secretions will be more, stimulating the skin around the anus and producing this itchy feeling, which is sometimes unbearable and will have the symptom of perianal eczema in severe cases. For this phenomenon, you can often clean the incision of perianal abscess to reduce the stimulation of the skin around the anus by the secretion, which can well relieve the itch, and if there is perianal eczema, you need to use medicine. The second reason is a normal physiological phenomenon. Because the newly grown meatus constantly presses on the nerve, it causes a slight itch, such as an anthrax sensation. This is a normal physiological phenomenon and does not require special treatment.