What should you know about deep hyperpigmentation?

Darkening may follow acne, eczema, burns, friction, or another inflammatory trigger. Sun and visible light can make contrast more noticeable, especially on exposed areas. The depth, colour, location, and cause influence how quickly it changes. New, changing, bleeding, very irregular, or single unusual patches should be examined rather than treated as a cosmetic concern alone. See also [Dark Patches On Skin](/symptoms/dark-patches-on-skin/).

Use daily broad-spectrum sunscreen, reapply as directed, and reduce rubbing or picking. Keep treatment gentle while the skin is irritated. A clinician may consider [Hydroquinone Treatment](/treatments/medical-dermatology/topical-hydroquinone-therapy/), a [Chemical Peel](/treatments/aesthetic-procedures/chemical-peel/), [Skin Brightening Treatment](/treatments/aesthetic-procedures/skin-brightening-treatment/), [IPL Photofacial](/treatments/laser-and-energy/ipl-photofacial/), or [Picosecond Laser Treatment](/treatments/laser-and-energy/picosecond-laser-treatment/), depending on the diagnosis and skin tone. Do not layer strong lightening products without guidance.

Arrange a dermatology review for a patch that is new and changing, has an uneven border or several colours, bleeds, crusts, hurts, or does not settle after the trigger improves. Seek earlier advice if darkening follows a severe reaction to a product or procedure. Urgency comes from those features, not from the depth of the pigment itself.

Ask what is causing the pigment, whether examination or testing is needed, which products are safe for your skin tone, and how to pause treatment if irritation develops. Discuss realistic fading timelines and how sun protection fits the plan.