The darkening of the skin in the leg sockets may be caused by melanin deposits, which can be improved by topical medications, acid peels or lasers. 1. Topical medication: Hydroquinone cream can be used externally to remove melanin deposits and improve the darkening of the skin in the leg sockets. 2. Fruit acid peeling: Fruit acid peeling mainly uses high concentration of fruit acid, which is applied to the surface layer of the skin through the way of applying to promote the local aging of the stratum corneum to fall off. And it can stimulate the regeneration of new collagen tissue, so as to achieve the effect of improving the darkening of the skin of the leg socket. 3. Laser: The laser procedure uses the wavelength of the laser to effectively penetrate into the underlying layers of the skin, destroying the melanin tissue in the underlying layers of the skin, blocking the pigmentation of the skin, and promoting the metabolism of the skin to discharge, so as to achieve the effect of removing the darkening of the skin of the leg sockets. The darkening of the skin in the fossa of the leg can be improved under the guidance of the doctor by choosing the above appropriate ways, not to use drugs recklessly, so as not to aggravate the condition.