Laser hair removal is to destroy hair follicles with laser or light, thus permanently removing hair. Its principle is to use the pigment in the hair follicle to absorb light of a certain wavelength, thus generating heat. When the heat energy reaches a certain level, hair follicles can be burned. It applies the selective photothermal theory of laser. The application rate of laser hair removal in China is very high, and there are many kinds, and the effect, safety and comfort are constantly improving. Laser hair removal is the best permanent hair removal method at present. First, it selectively does not harm other tissues. The second effect is positive, which can achieve permanent hair removal; Third, high safety and comfort.