The skin of the human body is a relatively light-transmissive structure. The clinical experiment of plastic surgery experts found that in the face of a powerful laser, the skin is simply a transparent cellophane, so the laser can penetrate the skin very smoothly through the skin, due to the hair follicle A lot of melanin, so it can absorb a large amount of laser energy and finally convert it into heat energy, so that the temperature of the hair follicle rises, and the function of destroying the hair follicle is achieved.
In this process, the skin itself does not have any damage because the skin does not absorb laser energy relatively, or absorbs a small amount of laser energy.