Post-trauma hyperpigmentation: what to know

A cut, burn, bite, acne spot, rash or procedure can activate pigment-producing cells. Extra melanin may remain after the injury has healed, leaving a brown, grey or darker patch at the affected site. The colour can be more pronounced after sunlight and may last longer in richly pigmented skin. The patch should match the history and examination; a new or changing mark may need a different diagnosis.

Let the skin barrier heal, avoid picking or scrubbing, and use broad-spectrum sun protection on exposed areas. Treat active inflammation with clinician guidance, since repeated irritation can deepen the colour. A dermatologist may discuss Hydroquinone Treatment, a Chemical Peel, Skin Brightening Treatment, IPL Photofacial or Picosecond Laser Treatment according to the cause, depth, location and skin tone. These options can also irritate skin, so professional selection and aftercare matter.

Seek a skin assessment if the patch develops without a known injury, changes shape or colour, bleeds, becomes painful, or fails to resemble the healing area. Get prompt care for warmth, pus, increasing tenderness or spreading redness, which can signal ongoing inflammation or infection. Do not start a strong lightening product on broken skin.

Ask whether the colour is post-inflammatory, how long healing may take, which ingredients are safe for your skin, and how to reduce the chance of pigment change after a procedure.