Anal fistula surgery is usually a direct anal fistula incision and hanging, its treatment effect is more thorough and the recurrence rate is low, so as one of the anal fistula surgery methods. If the local wound itches 40 days after anal fistula surgery, it is considered a normal phenomenon, generally due to the local skin small nerve activity, is an important sign of post-operative recovery, need to be further anorectal review, to exclude the possibility of wound recurrence or infection, generally do not interfere excessively. You can choose to use light saline or potassium permanganate solution to clean the local wound after each bowel movement, and apply carbomer gel to relieve itching. At the same time, it should be noted that within six months after surgery, do not eat chili peppers, seafood, not to mention alcohol, to avoid food stimulation and lead to local wound mucosa pain, itching, or even bleeding.