hyperpigmentation

noun

hy·​per·​pig·​men·​ta·​tion ˌhī-pər-ˌpig-mən-ˈtā-shən 

-ˌmen-

: excess pigmentation in a bodily part or tissue (such as the skin)

Vitamin C has been reported to inhibit the production of melanin, the stuff that produces not only a tan but also freckles and hyperpigmentation.

—Anne Weintraub

The presence of nickel can cause a skin rash that leads to hyperpigmentation, or darkening, of the skin.

—Jenyne M. Raines

hyperpigmented

ˌhī-pər-ˈpig-mən-təd 

-ˌmen-

adjective

hyperpigmented skin

Examples of hyperpigmentation in a Sentence

Recent Examples on the Web

In one study, researchers looked at the effects of a skincare routine involving a treatment with 0.5% retinol and a moisturizer with 30% vitamin C on people with hyperpigmentation and photodamage. —Sarah Bradley, Health, 24 Dec. 2024

At the same time, cica works to calm irritation, while panthenol adds additional hydration, and niacinamide combats hyperpigmentation. —Kiana Murden, Vogue, 17 Dec. 2024

This non-greasy product is recommended for anyone who struggles with sensitive skin, acne scars, or hyperpigmentation. —Claire Rutter, Rolling Stone, 12 Dec. 2024

If overnight flights are often on the itinerary, this triple-action formula tackles redness from rosacea, hyperpigmentation and flare-ups. —Paula Conway, Forbes, 9 Dec. 2024

Word History

First Known Use

1866, in the meaning defined above

Medical Definition

hyperpigmentation

noun

hy·​per·​pig·​men·​ta·​tion -ˌpig-mən-ˈtā-shən, -ˌmen- 

: 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- 

adjective

hyperpigmented skin