The current hair removal methods include hair removal cream, scraping and laser hair removal. Hair removal by hair removal cream and scraping method is more common, but only short-lived effect, and the more hair is removed, the heavier the hair is; while laser hair removal is more permanent but hair removal method, but after laser hair removal 5-10 years will have individual seekers appear hair regeneration situation. Laser hair removal is to emit a certain wavelength of laser through the laser instrument, the hair follicle selectively absorbs the specific wavelength of laser energy to produce a very high temperature and kill the stem cells inside the hair follicle. This will not form new hair, especially the semiconductor laser for hair removal, basically can achieve the purpose of permanent hair removal. But often need to be treated according to different parts of a certain amount of time, for example, for the underarms and other parts of the hair is thicker and thicker, need to carry out 4 times hair removal, in order to play a very good but effect; for lip hair and other hair fine soft parts, may need to treat more times. At the same time, some cell death will be produced, which can be accompanied by a painful sensation, which can generally disappear soon after the laser treatment.