Xia Wenhua, director of the Laser Beauty Center of the Navy General Hospital, explained that laser therapy uses the heat generated by laser irradiation to destroy abnormal pigment cells or blood vessels in the skin without damaging normal epidermal cells and other tissues in the dermis, thus effectively removing pigmentation or vascular lesions without leaving scars. The curative effect of laser on various moles is clear. For superficial skin lesions, laser can be used to remove them quickly and effectively. For black skin lesions such as nevus OTA, laser treatment for 4 ~ 6 times can make the skin lesions disappear completely and the skin return to normal. Laser treatment of skin vascular diseases such as port wine stains is also very effective. When treating different moles, doctors will choose different lasers for treatment, but the general process is basically the same. Most skin lesions need multiple treatments, usually once every three months. Each treatment takes about a few minutes to dozens of minutes. After treatment, there may be exudation, scab, swelling and even blisters locally, but the scab will fall off in a week or so. In the meantime, pay attention to protect the wound from sunlight.