Sweat hair on the legs is now mainly removed by laser hair removal. The principle of laser hair removal is to use specific wavelengths of light to act directly on the root of the hair follicle to destroy the hair follicle without affecting the surrounding normal skin appendages and skin tissues, without affecting perspiration, etc., to remove the hair. In general, the hair is removed in the growth phase, so it takes about 4 times for laser treatment. For the sweat hair on the legs, the interval of 2-3 months treatment, the thicker the hair the better the effect of the black. The treatment is done by shaving the hair first and then the professional operation of laser hair removal.