Fractional laser is the output of a single wavelength of light in the form of a matrix arrangement of micro-laser beams. These fine micro-laser beams selectively act on the target tissue and stimulate the dermis to produce new collagen, thus achieving the purpose of wrinkle rejuvenation. The specific risks of the procedure are as follows: 1. Wound bleeding: fractional laser treatment will form three areas of thermal exfoliation, thermal coagulation and thermal effect in the skin layer, which may result in wound bleeding due to improper operation; 2. Facial burns: fractional laser can automatically fine-tune the diameter and density of the light points to allow even distribution of energy, but if the operation is wrong, it may also cause excessive local heat and cause facial burns; 3. Wound infection: After receiving fractional laser treatment, the facial skin will have wounds that are invisible to the naked eye, but bacteria can get in. If the disinfection of the instruments during the procedure is not complete and the post-surgical care is not proper, there is also a risk of wound infection; 4. Redness, swelling, and pain: Fractional laser treatment will cause slight damage to the skin, and the skin will usually be red, swollen, and painful after treatment. 5, dry skin: In the process of fractional laser treatment, the epidermis will be peeled off the waste keratin layer, affecting the skin water lock function, while due to the photothermal effect, the epidermis temperature increases, water evaporation will be accelerated, so the skin will be dry and tight; 6, skin tone deepening: according to the different degrees of treatment, the skin will show temporary skin tone deepening ranging from 3-14 days, generally It may take 3-6 months to fully recover the natural skin tone; 7.