Regardless of the type of laser cosmetic treatment, the most important point after the procedure is to pay attention to sun protection. UV rays have always been the culprit of skin problems such as pigmentation. After laser treatment, the skin is in a fragile and repair stage, and is more sensitive to external stimuli, if you do not do a good job of sun protection and maintenance, then under the influence of ultraviolet light pigmentation, pigmentation and a series of skin problems will re-emerge. Some of the invasive fractional laser procedures will leave a thin scab on the skin, which will take about a week to fall off. To minimize possible skin irritation, it is not recommended to use any sunscreens during this time. After the scabs have fallen off, it is recommended that you choose a suitable medical sunscreen to protect your skin from the sun. If you are going out, it is best to wear a hat or umbrella. In addition, try to avoid traveling between 11:00 am and 3:00 pm in the summer, when the sun is the most intense and the UV rays are the strongest, which will make your skin easily sunburned.