Precautions after laser treatment: 1. In principle, you cannot scrub with water within 7 days after laser treatment. Protect the traumatic surface clean, locally available anti-infective, healing-promoting drugs for external use, clean. 2, prohibit the premature thought of scab removal, should be left to fall off on their own. 3.Avoid direct sunlight ultraviolet radiation. 4.Some patients appear pigmentation after treatment, depending on individual circumstances, will generally gradually subside after 1-6 months. 5.If you have any special discomfort, please follow up promptly.