Hyperpigmentation is a common condition in which patches of skin become darker in color than surrounding skin, due primarily to the overproduction and accumulation of the skin pigment, melanin. Common causes of hyperpigmentation include exposure to solar radiation, hormonal changes, inflammation, and acne. The most effective way to reduce hyperpigmentation is to reduce sun exposure and wear a broad-spectrum sunscreen when outside.
SYNONYMS: Age Spot
Hyperpigmentation. Dermatalogic Disease Database. American Osteopathic College of Dermatology. Retrieved 2010-09-14.