Hyper-pigmentation can have causes that aren’t due to underlying disease. Examples include a tattoo, a suntan, tanning lotions or medication side effects.
Hyperpigmentation is a common, usually harmless condition in which patches of skin become darker in color than the normal surrounding skin. This darkening occurs when an excess of melanin, the brown pigment that produces normal skin color, forms deposits in the skin. Hyperpigmentation can affect the skin color of people of any race.