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
Plumbody, an ultra-hydrating body cream featuring a patented ingredient called Midnight Muir, which helps reduce redness, dryness and hyperpigmentation, while fighting free radicals and enhancing skin elasticity.
—Tory Johnson, ABC News, 24 Feb. 2026
While vitamin C and niacinamide work over time to fade hyperpigmentation (a main cause of dark circles), caffeine helps to firm and depuff.
—Tracy Perez Han, InStyle, 20 Feb. 2026
Without proper protection, sun exposure can actually undo the benefits, leading to accelerated skin aging that shows up as sun spots, hyperpigmentation, sagging, or increased crepiness.
—Christa Joanna Lee, Allure, 5 Feb. 2026
Why This Matters For Melanated Skin Melanated skin is more prone to post-inflammatory hyperpigmentation, meaning irritation often leaves a mark long after a breakout or reaction is gone.
—Corein Carter, Forbes.com, 27 Jan. 2026
See All Example Sentences for hyperpigmentation
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Tory Johnson, ABC News, 24 Feb. 2026
While vitamin C and niacinamide work over time to fade hyperpigmentation (a main cause of dark circles), caffeine helps to firm and depuff.
—Tracy Perez Han, InStyle, 20 Feb. 2026
Without proper protection, sun exposure can actually undo the benefits, leading to accelerated skin aging that shows up as sun spots, hyperpigmentation, sagging, or increased crepiness.
—Christa Joanna Lee, Allure, 5 Feb. 2026
Why This Matters For Melanated Skin Melanated skin is more prone to post-inflammatory hyperpigmentation, meaning irritation often leaves a mark long after a breakout or reaction is gone.
—Corein Carter, Forbes.com, 27 Jan. 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 2 Mar. 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
