The sunken scar on the child’s face, i.e. atrophic scar, can be treated by laser treatment, surgical therapy and chemical peeling at present. 1. Laser treatment: Erbium laser and carbon dioxide fractional laser with stripping effect can be chosen to strip off the edge of the scar, promote collagen regeneration and rearrangement of the scar depression, and improve the appearance of the scar. 2. Surgery: If the defect is large and the effect of conservative treatment is not good, surgical excision of the scar can be chosen, and then again reduce the tension suture. However, surgery is an invasive operation, and there is a risk of scar formation again, so it should be chosen with caution. 3. Chemical skin resurfacing: professional concentration of fruit acid and salicylic acid can exfoliate the local epidermis, stimulate collagen regeneration and improve the appearance of the scar. The above treatments should be carried out under the guidance of specialists. If treatment is needed, parents are advised to bring their children to regular hospitals in time and follow the doctor’s instructions for standardized treatment.