When sewing, the doctor must remove the hair from your injured part. You'd better go to the barber shop now, push your hair off, then go back, cover the suture wound with clean gauze, and then rinse other uninjured scalp with warm water to remove dandruff and scalp grease. Be careful and patient to deal with the vicinity of the suture site, and don't let the wound get wet. Finally, use hydrogen peroxide disinfectant to clean around the wound, so that the scalp will not itch again.