1: The wound should be disinfected, stitched and bandaged in time after injury. Attention should be paid to disinfection and dressing change during this period. When the wound scabs, don't dig with your hands, and let the scar fall off naturally.

2. Don't disinfect the wounds in obvious parts such as face with iodophor to avoid pigmentation. It itches when the wound heals. At this time, grasping or rubbing clothes by hand to relieve itching will easily lead to telangiectasia and scar formation.

It is also important to protect the wound from sunlight. Ultraviolet radiation in the sun can easily make new skin pigmentation, leaving obvious scars, especially in summer, when the sun is big and the ultraviolet rays are strong, we must pay attention to protecting the injured parts from sunlight.

4. Cosmetics, soaps and other skin care products should not touch the injured part. Most of these daily necessities contain chemical factors such as lead and mercury and other photosensitive substances, which may cause pigmentation of the injured skin and leave scars.