Staining of the nail plate may occur due to nicotine, dyes (including hair dyes and nail polish), potassium permanganate, mercury compounds, hydroquinone, elemental iron, mepacrine, photographic developer, anthralin, chrysarobin, glutaraldehyde, or resorcin.James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology. (10th ed.). Saunders. .
See also Nail anatomy List of cutaneous conditions
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