In principle, there is no age limit for laser hair removal, but it is generally recommended that hair removal treatment be considered after adulthood, i.e. after the age of 18 when all body organs are mature. Laser hair removal uses selective thermal damage to the hair follicle, which destroys the hair follicle and inhibits hair growth, and to a certain extent radiation will be produced. The body hormone secretion is still unstable during adolescence and hair growth is also unstable, so hair removal too early may be less effective and may stimulate some potential dormant hair follicles, which will instead form the phenomenon of hair proliferation. Therefore, it is recommended to receive laser treatment when you are an adult, which is relatively safer and more reliable. Laser hair removal is mainly for the shedding treatment of hair in the anagen phase, while it is basically ineffective for the hair in the regressive and resting phases, so you must wait until this part of the hair is cycled to the next anagen phase before the treatment can be performed. Usually it takes 3-5 times with about 1 month between treatments to achieve the desired result. If the sweat hair is coarse, it may take more than 5 times to achieve more desirable results. During the laser hair removal treatment, you should pay attention to sun protection and avoid direct sunlight on the hair removal area. Just after hair removal, the skin is dry and sensitive to the surrounding environment, so you can do proper moisturizing and skin care.