Kojic acid and black skin

Black skin contains more active melanin, which contributes to its natural colour and helps create the visible contrast of dark marks after inflammation. Kojic acid reduces activity in a melanin-making pathway; it should be used for an identified area of excess pigment rather than as a way to alter natural skin tone.

A burn, rash, acne lesion, friction, or overly strong cosmetic routine can leave post-inflammatory hyperpigmentation. In deeper skin tones, that response may be particularly noticeable and can last after the original irritation settles. This is why a product that feels harsh is not a sign that it is working.

Start with an intact, calm area and patch-test before broader use. Follow the label, apply a thin layer only where directed, and use a moisturiser to support the skin barrier. Avoid applying it to freshly shaved, scratched, peeling, or inflamed skin, and avoid the eyes and lips.

Use sunscreen and protective clothing on exposed areas; visible light and ultraviolet exposure can sustain pigmentation. Avoid stacking kojic acid with scrubs, strong exfoliating acids, or retinoids until you know how your skin responds. A dermatologist can assess whether the colour change is post-inflammatory pigmentation, melasma, a medication effect, or another condition and can adapt treatment to your skin tone.

Stop using the product if burning, swelling, blistering, intense itching, or a spreading rash develops. Seek care for a mark that changes rapidly, bleeds, crusts, or looks unlike your usual pigmentation. If a treated area becomes darker after irritation, pause active products and arrange an assessment rather than increasing application.

Ask what is causing the pigmentation, whether kojic acid fits your skin history, and how to reduce the chance of post-inflammatory darkening. Ask about a lower-irritation schedule, compatible moisturisers, sun protection, and alternatives if you have eczema, keloid-prone skin, or previous reactions.