The skin of our human body is a relatively transparent structure. Before the powerful laser, the skin is a piece of transparent cellophane, so the laser can penetrate the skin to the hair follicle (the part where the hair grows). Because there is a lot of melanin in the hair follicle, it can preferentially absorb a large amount of laser energy and finally convert it into heat energy to raise the temperature of the hair follicle, Achieve the purpose of destroying hair follicle function.
In this process, because the skin does not absorb laser energy or absorbs a small amount of laser energy, the skin itself will not be damaged. In addition, the cooling device for protecting the skin is installed on the laser treatment head, so the skin will not be damaged during hair removal treatment, so there will be no abnormal pigment or scar reaction.
There are three stages of hair growth: growth stage, stationary stage and degenerative stage. Only when the hair follicle is in the growth stage, there will be a large number of pigment particles in the hair follicle and can absorb a large amount of laser energy. Therefore, the laser can remove the hair in the growth stage, while the hair pigment in the degenerative stage and stationary stage is relatively small, Therefore, the therapeutic effect of laser is relatively weak. For this part of hair, laser removal can only be carried out after they slowly change to the growth period. Therefore, laser hair removal treatment can not be successful at one time. It usually needs multiple continuous laser irradiation to achieve the ideal effect.
In addition, the regeneration function of hair follicles is very strong. One laser irradiation can only temporarily stop the growth of hair follicles or severely weaken their normal function, rather than destroy hair follicles. If the interval between treatments is too long, hair follicles will have enough time to restore their growth function, which is also the reason why hair removal needs to be repeated for many times, To achieve the ideal therapeutic effect, it is necessary to accumulate the therapeutic effect of multiple lasers on the hair follicle, and finally make the hair follicle completely lose its growth function.