Gum depigmentation is a procedure used in cosmetic dentistry to remove black spots or patches on the gums caused by excessive melanin. The normal color of the gum tissue (gingiva) is pink, but excess deposits of melanin (melanin gingival hyperpigmentation) can create what seem to be black spots or patches on the gums, creating an aesthetic or cosmetic problem. Discolouration may also be caused by long term use of certain medications.

A clinical assessment is carried out to customize the treatment to the patients needs, and the procedure itself can involve surgical, chemical or laser ablation techniques.