There are two types of scarring after acne: one is atrophic scarring and the other is hyperplastic scarring. For atrophic scars, an ablative fractional laser, such as carbon dioxide fractional laser treatment, is preferred. Once every two months, depending on the severity of the scar, it will take about three to five treatments to achieve a more desirable result. Other effective treatments include non-ablative fractional laser, gold microneedle radiofrequency treatment, etc. Some larger depressed scars can also be selected for blunt needle separation, filling or surgical excision. For hyperplastic keloid scars and keloids, treatment is more difficult. Currently, most of them are treated with a combination of treatments, such as local seal injection of tretinoin, carbon dioxide fractional laser, etc., combined with topical scar removal gel after treatment. The formation of scars is mainly related to the improper handling of acne occurrence, so those who are growing acne should go to the hospital in time for consultation and treatment, and should not mess around at home itself.