Lichen planus skin condition: what to know

The immune system drives inflammation in the skin, producing bumps or patches that may be purple, reddish, brown, or darker than nearby skin. Itch is common, but some areas are mainly sore or sensitive. After inflammation settles, colour changes can remain for a while. Lichen planus can also involve the scalp, nails, mouth, or genital skin. Learn more on the [Lichen Planus](/conditions/lichen-planus/) condition page.

A dermatologist can confirm the pattern and check for involvement beyond the visible rash. Keep the skin moisturised, use gentle unscented products, and avoid scratching or repeated friction. Treatment depends on the site and activity. A clinician may prescribe [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/) for local areas or discuss [Oral Corticosteroid Treatment](/treatments/medical-dermatology/oral-corticosteroid-therapy/) when disease is more widespread. Do not use someone else’s medicine on a rash.

Book a dermatology review for a rash that persists, spreads, becomes painful, or affects sleep. Seek prompt assessment for mouth or genital sores, eye symptoms, scalp hair loss, or signs of infection such as increasing warmth, pus, or crusting. Get urgent help for facial swelling, breathing difficulty, or trouble swallowing.

Ask how the diagnosis was made, which body sites should be checked, what treatment is suitable for each area, and how to manage lingering colour changes. Ask how often your skin should be reviewed and which symptoms need earlier contact.