Pimple hyperpigmentation: why it happens and what helps

When a pimple becomes inflamed, pigment-producing cells may become more active. The result is usually a flat brown, grey, or darker patch where the spot was. This differs from a depressed or raised acne scar, although both can occur together. Darker skin tones may notice post-inflammatory colour change more clearly, especially after picking or repeated irritation. The pattern and texture help a clinician separate it from other [Dark Patches On Skin](/symptoms/dark-patches-on-skin/).

Keep the routine simple: cleanse gently, moisturise, and use broad-spectrum sunscreen on exposed areas. Avoid squeezing pimples and avoid unlabelled lightening mixtures. Control new breakouts with advice suited to your skin; a topical retinoid may help acne and cell turnover, but it can irritate if introduced too quickly. A dermatologist may consider [Hydroquinone Treatment](/treatments/medical-dermatology/topical-hydroquinone-therapy/), [Chemical Peel](/treatments/aesthetic-procedures/chemical-peel/), [IPL Photofacial](/treatments/laser-and-energy/ipl-photofacial/), or [Picosecond Laser Treatment](/treatments/laser-and-energy/picosecond-laser-treatment/) after examining the mark and your tendency to pigment.

See a dermatologist when marks keep multiplying despite acne control, involve unusual areas, itch or scale, or are changing in shape or colour. Prompt assessment is appropriate for bleeding, ulceration, significant pain, or a rapidly changing spot. Do not start a strong pigment treatment on a diagnosis made from a photograph alone.

Is this post-inflammatory hyperpigmentation or a scar? Which acne treatment will reduce new marks? How should I introduce a pigment product? Would a procedure be suitable for my skin tone, and how will irritation be managed?