There are many ways to remove leg hair, but the only methods that can achieve permanent removal are electrolysis and laser hair removal. 1. Electrolysis is the only permanent hair removal method approved by the FDA. A probe is inserted into the hair follicle under the surface of the skin, destroying the hair root and follicle through electric current, and its damage affects the growth of the hair and leads to the loss of existing hair. There is generally no risk other than slight pain and discomfort during treatment. For leg hair, permanent results can be accomplished in about 3 to 4 sessions. 2. Laser hair removal, by emitting a specific wavelength of laser light, melanin-rich hair follicles are absorbed and destroyed, and the hair cannot grow. Generally speaking, once a month treatment, leg hair can be removed permanently in about 4 to 6 sessions. The above operations need to be carried out by a specialized physician after professional assessment.