What is lichen planus pigmentosus?

Inflammation can stimulate pigment production and leave colour behind as the active rash settles. The patches may be smooth, uneven in shade, and more noticeable in areas exposed to sunlight or repeated rubbing. Some people have mild itch or no sensation at all; others notice an earlier phase of redness or small bumps. Several pigment conditions resemble one another, so a dermatologist may assess the pattern, skin tone, timing, and any active inflammation before confirming the diagnosis.

Use broad sun protection and shade or clothing to reduce darkening from ultraviolet exposure. Keep the routine gentle: avoid harsh scrubs, strong fragrances, and untested lightening products, because irritation can deepen post-inflammatory colour. Take clear photographs in consistent lighting to help track change. A dermatologist may consider a topical corticosteroid when inflammation is active; treatment choice depends on location and skin sensitivity. Background information is available at [Lichen Planus](/conditions/lichen-planus/) and [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/).

Arrange an assessment for new, rapidly changing, itchy, scaly, bleeding, or painful pigmentation, or for colour change around the eyes or mouth. Seek prompt review if a patch becomes raised, develops an open sore, or changes in a way that concerns you. Examination helps separate lichen planus pigmentosus from contact reactions, medication-related changes, other pigment disorders, or a lesion needing different care.

Ask whether the patches show active inflammation, whether a biopsy would clarify the diagnosis, and which products are safe for your skin. Discuss sun protection, expected colour changes, follow-up timing, and what would count as a meaningful change.