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

The do-it-all-ingredient is a potent antioxidant, prevents excess melanin production to reduce hyperpigmentation, and can also boost the efficacy of your sunscreen, says Dr. Yadav. —Michelle Rostamian, Allure, 30 Dec. 2024

Helps to smooth out fine lines, while reducing hyperpigmentation and dark circles. —Kiana Murden, Vogue, 14 Dec. 2024

Combined, this recipe moisturizes, hydrates multiple layers of the skin barrier, and reduces hyperpigmentation, all while plumping and smoothing the skin on your lips. —Madison Yauger, People.com, 11 Dec. 2024

The serum triggers natural collagen production, improves hydration and prevents transepidermal moisture loss, boosts elasticity and firmness, and reduces hyperpigmentation and sagging. —Celia Shatzman, Forbes, 26 Nov. 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