After having fractional laser, avoid prolonged ultraviolet exposure, strengthen skin protection, and you can also use some products containing ingredients that promote barrier repair. 1. avoid prolonged ultraviolet radiation: avoid traveling when the ultraviolet rays are strong at noon, and protect the ultraviolet rays by wearing a hat, mask or umbrella. 2. Enhance skin protection: Keep skin clean and hygienic, eat a balanced diet, avoid stimuli such as alcohol and tobacco, and disinfect wounds and surrounding skin with iodophor or mupirocin. 3. Promote barrier repair: you can use some moisturizing products containing hyaluronic acid and ceramide, which can help the recovery of the wound. After doing fractional laser, you should follow the doctor’s advice to change the medicine and prevent infection, if you need to use medicine, you should use it under the doctor’s guidance.