In general, lasers cannot completely remove scars. However, the appearance of scar can be improved by photoelectric treatment, such as exfoliative laser treatment and non-exfoliative laser treatment. 1. Exfoliative laser: For depressed scarring, fractional carbon dioxide laser treatment can be performed. Fractional carbon dioxide laser is applied on the Fractional carbon dioxide laser is used to form tiny traumas on the surface of depressed scar through the photothermal effect of laser, and stimulate the regeneration and rearrangement of local deep collagen tissues through local damage reconditioning, which can improve the appearance of depressed keloid scars. 2. Non-exfoliative laser: the early stage of scarring can be irradiated with pulsed dye laser, at this time the scar is in the proliferative stage, dye laser can selectively act on the scar superficial hemoglobin denaturation, thus occluding the scar capillaries, to achieve the purpose of inhibiting scar proliferation. However, it can’t relieve the old scar. Note: It is recommended that patients who wish to undergo treatment go to a regular medical institution and choose the appropriate treatment plan according to their own scar conditions.