With the improvement of people’s living standards, many people have a more specific pursuit of beauty, such as the arrival of summer, the love of beauty girls will be very concerned about the limbs of the more obvious hair, so the laser has become the eyes of the omnipotent machine, what affects the beauty of the disease can be treated. In response to some of the treatment misunderstandings (beauty clinic false propaganda) and common clinical laser treatment failure ratio, the following and we talk about the indications for laser treatment. 1, vascular lesions (1) nevus erythematosus: commonly used 595nm, and Nd-YAG1064nm and emerald gemstone 755nm for deep penetration, but there is a risk of causing scarring. Treatment effect 1/3 good effect, the rest of the effect is moderate or poor. In addition to the doctor’s clinical experience (note that some beauty clinics operate laser machines without any qualification), the treatment effect is also related to the color and location of the hemangioma, and the ideal number of treatments is 3-4 times. Shanxi Provincial People’s Hospital, Department of Dermatology, Hao Shuyuan (2) hemangioma: laser is not suitable for the treatment of such diseases 2, pigmented lesions: such as nevus of Ota, coffee spots, exogenous pigment tattoos, etc.. For pigmented lesions in the epidermis, choose 532-755nm wavelength laser, and for the dermis, choose 1064nm. For tattoos, different wavelength lasers should be used for different colors. Laser is not suitable for the treatment of pigmented nevus and chloasma, on the one hand, there is pigmentation, on the other hand, there will be rapid recurrence, or even deterioration. 3, hair removal: 600-1100 long pulse light, white hair is invalid, terminal hair is better than cui hair, the growth of early hair is effective. Face 1 time per month, trunk 1 time per month, generally 5-6 courses. 4, skin rejuvenation (1) CO2 laser or pulse bait-YAG peeling skin rejuvenation, suitable for scar repair. (2) Fractional laser: suitable for photoaging repair. (3) Contouring laser: to relieve moderate facial aging and inflammatory acne. In conclusion, laser treatment not only has indications but also different lasers are suitable for different diseases, so you must understand whether you are suitable and possible side effects before treatment.