Laser scar removal here refers to all kinds of photoelectricity, including laser, photon, radio frequency and so on. Laser treatment of scars The basic principle of laser treatment of scars is to selectively heat hemoglobin, melanin and water molecules in skin tissues, and pulse dye laser, photon, 532nm- 1064nmNd-YAG laser can seal the early proliferative capillaries. The laser for melanin is mainly Q-switched laser, such as Nd-YAG laser, ruby laser and emerald laser, which has a good therapeutic effect on color precipitation or dust deposition. For water molecules, such as CO2 laser, erbium laser, infrared laser, ultrasonic wave, radio frequency and plasma, proper thermal damage is mainly caused.