The laser instrument in the hospital can depilate lips: HR808 laser depilation is based on the principle of selective photothermal kinetics, because human skin is a relatively light-transmitting structure. In the face of powerful laser, the skin is like a piece of transparent cellophane. The laser can penetrate the skin very smoothly and reach the hair follicle, which is the part where hair grows. Melanin in hair follicles can increase the temperature of hair follicles by absorbing a lot of laser energy and eventually converting it into heat energy, thus destroying the function of hair follicles.