Medical Definition of hyperpigmentation
: excess pigmentation in a body part or tissue (as the skin) hyperpigmentation of deep inflammatory acne lesions—Elizabeth A. Abel et al
hyperpigmented\-ˈpig-mənt-əd, -ˌment-\play adjective hyperpigmented skin
Seen and Heard
What made you want to look up hyperpigmentation? Please tell us where you read or heard it (including the quote, if possible).