Post-inflammatory hyperpigmentation on the arms

PIH happens when inflammation signals pigment-producing cells to make or release more melanin. On the arms, triggers can include healing bites, burns, shaving, rashes, or Acne. Marks may be light brown, deep brown, grey, or nearly black, and they can be flat with normal skin texture. Ongoing itching from Atopic Dermatitis or repeated rubbing can keep adding inflammation. Dark patches can have other causes, so a changing or unusual mark deserves an examination.

Cover the arms or use broad-spectrum sunscreen when outdoors, and moisturise to reduce dryness and friction. Treat itch, acne, or another active trigger with professional guidance rather than scratching. Avoid harsh scrubs and unlabelled lightening mixtures. Depending on the mark and your skin, a clinician may discuss Chemical Peel, Skin Brightening Treatment, or Picosecond Laser Treatment. These options can irritate skin and should be selected and monitored by a qualified professional.

Book an assessment if a patch is rapidly enlarging, raised, painful, bleeding, crusted, very itchy, or different from nearby marks. Seek prompt help for spreading warmth, pus, fever, or facial swelling. Routine review is also sensible when several new patches appear without a clear injury, or when the colour does not improve after the trigger has settled.

Ask what started the inflammation, whether the mark is PIH or another cause of uneven skin tone, how to protect your arms, and which treatment has the lowest irritation risk for you.