Laser hair removal is an ideal hair removal method at present. Laser hair removal is based on the principle of selective photothermal kinetics. By adjusting the laser wavelength and pulse width reasonably, the laser can pass through the skin surface and reach the hair follicle at the hair root, thus achieving the effect of complete hair removal. Laser hair removal will not affect perspiration, because perspiration mainly depends on eccrine glands, and the openings of eccrine glands are not in hair follicles.