Concentrations of hydroquinone above 2% are illegal in skin bleaches, but even at this low level hydroquinone can be a health hazard. It has been found to cause skin cancers or irreversible skin damage in some women. The permanent destruction of small groups of melanocytes commonly causes small white patches (vitiligo) on black skin. That is why for black skin it is indeed necessary to adopt a Scar Cover up makeup as these preparations are used on black skin to leave a smoother, less ashy surface for the application of make-up. The most suitable desquamators contain plant products, e.g. oatmeal granules. The AHA glycolic acid is a mild desquamator used in night creams.