Laser is mainly used to inhibit scar proliferation and improve the appearance of scars by applying the thermal energy generated to the target tissues. Laser to remove scars, the commonly used lasers are fractional laser, dye laser, etc. Fractional laser is mainly used to stimulate collagen regeneration through photothermal effect on the skin, promote skin fiber rearrangement, and improve the appearance of scars; dye laser is mainly used to make hemoglobin denaturation, close the capillary blood vessels at the scars, and improve the appearance of redness while inhibiting the proliferation of scars. After laser treatment, it is recommended to follow the doctor’s instructions to take antibiotics to fight infection, pay attention to the scientific care of the treatment area, the scar skin is recommended to fall off by itself, do not force to fall off, but also need to pay attention to sunscreen, avoid direct ultraviolet radiation. Warm reminder: laser scar removal is an invasive operation, the aseptic operation requirements are high, improper selection of laser energy or type will lead to pigmentation or aggravate the scar; if you are a keloid, laser treatment needs to be extra cautious. It is recommended to go to a regular medical institution under the guidance of a specialist, do not operate blindly, so as not to cause adverse effects.