After scratching, if the wound is not deep, it will not leave a scar after proper treatment. If the wound is deep or infected, scars may form. After local disinfection of superficial wounds with 1: 1000 bromogeramine, apply anti-inflammatory ointment and take anti-inflammatory drugs orally to prevent infection. Deep wounds need debridement and suture. Pay attention to facial hygiene, disinfect and apply medicine on time to prevent infection. Don't remove it forcibly after local scab, let it fall off naturally, and protect it from the sun locally after falling off. Children are not allowed to eat spicy and seafood.