Laser can produce monochromatic light with high energy and accurate focus, and it has a certain penetrating power. When it acts on human tissues, it can produce high heat locally. Laser cosmetology is to use this characteristic of laser to remove or destroy the target tissue and achieve the purpose of cosmetic treatment. A variety of advanced laser instruments can effectively penetrate the surface layer of skin, making pigment particles instantly expand and rupture, forming tiny fragments, which are eliminated by phagocytes in the body, thus effectively eliminating freckles, moles and birthmarks. But many people will ask how long does it take to get rid of moles and scars by laser? Jiaxing Shuguang plastic surgery experts suggested to beauty lovers that Dot mole should pay attention to the following points: (1) Do not touch the affected area with water within 4-7 days after treatment. Apply antibiotic ointment every day. (2) If the wound is swollen and uncomfortable, it can be iced. Please cover the wound with sterile gauze, and then ice it with ice cubes or ice towels. Please seal the ice cubes or ice towels with clean plastic bags. (3) You can wash your face or affected area after 6 days, but please pat your face or affected area. Don't wipe hard! Be careful not to wipe off the scab. (4) Before the scab falls off, please rub the ointment once in the morning and once in the evening. When the wound heals, it itches. Don't scratch, cover it with clean gauze when sleeping to prevent scratching. (5) After the scab skin falls off, there is no need to apply ointment. Three months to half a year after treatment, we should avoid unnecessary sun exposure, pay attention to sun protection, and apply sunscreen (SPF40 or above) during the day to prevent ultraviolet UVA/UVB damage. When going out, you should not only wear sunscreen, but also take an umbrella. (6) Do not use other drugs or cosmetics, especially make-up, before the scab falls off, so as to avoid inflammation of the affected area or affect wound healing. (7) When the affected part is completely healed (about 6 days to 10 days), cosmetics, shaving, etc. can be used. As usual. It is best to avoid traveling for a few days after laser surgery, because the total amount of ultraviolet rays received during long-distance travel may be equal to the amount of ultraviolet rays received in the living room for one year. Moreover, when flying at high altitude, because there is no cloud cover, the ultraviolet intensity inside the plane may be ten to twenty times higher than that on the ground. The harm of ultraviolet rays to the skin includes sunburn, premature aging, spots and wrinkles, solar dermatitis and skin cancer. Therefore, except for the parts exposed to clothes such as face, lips, ears, hands and feet, it is best to remember to wear anti-ultraviolet sunglasses to achieve all-round sun protection and achieve sun protection all year round.