Laser hair removal is based on the principle of selective photothermodynamics, through reasonable adjustment of the laser wavelength, energy, pulse width, the laser will be able to pass through the surface layer of the skin to reach the root of the hair follicle, hair follicle, the melanin of the hair shaft selectively absorbs the light energy, which produces a thermal effect that causes the hair follicle to necrotic, thus making the loss of the ability of regeneration of the hair, but at the same time without damaging the surrounding tissues. Many female friends choose laser hair removal to solve the problem of hair, but for laser hair removal many people still have a few misunderstandings, the following misunderstandings of laser hair removal: 1, take off once, effective? It is reported that laser hair removal generally need three to six times, in order to remove the hair clean, there are two reasons: First, most of the hair follicles are a group of three bundled together, open in the same pore, a hair in the pore in a group of three hair follicles below it in a hair follicle hair, so a treatment can only be destroyed a group of a hair follicle; Secondly, the growth of hair to go through the anagen phase, the degenerative phase, resting phase, in the anagen phase, the hair of the hair to do laser hair removal is the best way to remove hair. In the anagen phase, laser hair removal is 75% effective, 25% in the anagen phase, and almost ineffective in the resting phase. 2.After hair removal, does it affect sweating? It will not affect sweating, because sweating mainly depends on small sweat glands, and the opening of small sweat glands is not in the hair follicles, at the same time, laser hair removal is to sweep away the hair follicles, and will not harm the sweat glands, so it does not affect the human body’s metabolism and sweating. 3.Is laser hair removal safe? Laser hair removal is a very safe side of hair removal, professional, no side effects on the human body, almost no effect on the skin, and even incidental whitening, moisturizing effect. Of course, these effects, MM need to choose a good experienced skin doctor, to avoid improper operation, laser irradiation too long resulting in skin burns.