Children who bruise their face immediately after the wound is cleaned, disinfected, medication applied, bandaged and other treatments usually do not leave scars. The first thing you need to do after bruising your face is to clean the wound, either with water or hydrogen peroxide solution, to prevent the bruised area from retaining dirt that can lead to infection. After cleaning the abraded area, you need to disinfect the area, you can use medical alcohol, povidone-iodine and so on to gently wipe the affected area, can play a good role in disinfection. After disinfecting the area, you should apply antiseptic medications, such as red and purple ointment, and finally protect the wound with a band-aid. Afterwards, the wound should be cleaned and disinfected regularly, and the area should be kept clean and dry, without touching water, to avoid infection. After the scabs fall off naturally, there will be no scars.