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
Anne WeintraubThe presence of nickel can cause a skin rash that leads to hyperpigmentation, or darkening, of the skin.—Jenyne M. Raines
Jenyne M. RainesExamples of hyperpigmentation in a Sentence
Recent Examples on the Web
Meanwhile, iron oxides provide additional protection against visible light that can worsen hyperpigmentation.
—
Jenny Berg,
Glamour,
22 June 2026
Oska has also noticed a rise in the popularity of tinted sunscreen—particularly relevant for those dealing with melasma and hyperpigmentation—and ripples of K-beauty influence throughout the SPF category.
—
Jenny Berg,
Vogue,
22 June 2026
Staying true to its South Asian roots, key ingredients include amla fruit extract (more commonly known as Indian gooseberry oil), which is rich in vitamin C to brighten bouts of hyperpigmentation and protect skin against free radicals (which can fast-track signs of aging).
—
Jailynn Taylor,
Allure,
13 June 2026
Also present in the formula is niacinamide to smooth skin and reduce hyperpigmentation, and collagen to provide moisture.
—
Isabel Bekele,
InStyle,
10 June 2026
See All Example Sentences for hyperpigmentation
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Jenny Berg,
Glamour,
22 June 2026
Oska has also noticed a rise in the popularity of tinted sunscreen—particularly relevant for those dealing with melasma and hyperpigmentation—and ripples of K-beauty influence throughout the SPF category.
—
Jenny Berg,
Vogue,
22 June 2026
Staying true to its South Asian roots, key ingredients include amla fruit extract (more commonly known as Indian gooseberry oil), which is rich in vitamin C to brighten bouts of hyperpigmentation and protect skin against free radicals (which can fast-track signs of aging).
—
Jailynn Taylor,
Allure,
13 June 2026
Also present in the formula is niacinamide to smooth skin and reduce hyperpigmentation, and collagen to provide moisture.
—
Isabel Bekele,
InStyle,
10 June 2026
See All Example Sentences for hyperpigmentation
Cite this Entry
“Hyperpigmentation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hyperpigmentation. Accessed 25 Jun. 2026.
Copy CitationMedical 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.
Elizabeth A. Abel et al.Love words? Need even more definitions?
Merriam-Webster unabridged
