There are several methods to remove scars: i. For relatively superficial scar or post-acne scar, the scar is removed by using a machine. Gold microneedle plays the role of skin self-repair by reconstructing the skin after the relatively small destruction of the scar to achieve the role of lightening the scar. Second, fractional laser, through the laser spot, local high heat, the scar will be removed, the course of treatment requires several times of treatment. The chemical peeling, such as acid peeling, accelerates the renewal of the skin at the scar, which can play a role in lightening the scar, the treatment course also needs to adhere to several treatments, usually 4-5 times a course. Fourth, in addition, local injection of drugs, either collagen or fat injection, no matter what kind of scar removal method, it is recommended to standardize the treatment under the guidance of a doctor.