This method may be used over large skin surface areas (eg, legs, arms, back) or small controlled areas (eg, face, eyebrow, and bikini area). New hair growth appears more slowly than with shaving, as the hair must grow to the level of the skin surface before it appears. It is too easy to get thermal burns and scarring. In 1996 the Ruby laser first showed up on the scene as a permanent hair removal solution. The original lasers were only suited for light skin because the original lasers would take advantage of the dark pigment in the hair. Dark skin was susceptible to being burned along with the hair. Years later the Nd:YAG laser was adapted to be used in laser hair removal. Its wider wavelength opened the doors for customers with darker pigment to benefit for the same quick path to hair free skin.Electrolysis: When done right, electrolysis is the second best option for permanent hair removal next to lasers. It is successful on a wide 20 - 80 percent of the patients that undergo it. A weak electrical current passes through an electrode that has been inserted into the pour were the hair lives. Then one by one, an alternating current is directed to the hair follicle destroying it. This is very VERY slow and not practical for large areas. 激光脫毛 脫毛 永久脫毛 Depilatory creams: Depilatory creams like Nair use chemical depilatories whose sole purpose is to dissolve the disulfide bonds that hold hair cells together. While the results look better, the hair is only gone at the skin surface like shaving so it will grow back in short order. When these products warn about leaving it on longer than 6 minutes they mean it. The same chemicals that melt the hair can burn the skin or at least cause a rash or significant itching.While this is quick and effective for larger areas it is the most temporary.