What should you know about lichen planus?

The bumps may look purple, reddish-brown, or close to the surrounding skin, particularly on deeper skin tones. They often appear on the wrists, ankles, lower back, or legs and can join into rough patches. Some people develop fine white lines on the surface. Mouth involvement may cause white streaks, soreness, or sensitivity to spicy foods. Hair and nail changes also need attention. Review the condition overview for [Lichen Planus](/conditions/lichen-planus/) and symptom pages for [Itchy Skin](/symptoms/itchy-skin/) or [Skin Bumps](/symptoms/skin-bumps/).

A clinician may diagnose it by examining the skin and, when the appearance is uncertain, taking a small sample. Gentle moisturising, avoiding scratching, and identifying irritating products can reduce discomfort. Treatment depends on the site and severity. [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/) may calm local inflammation, while [Oral Corticosteroid Treatment](/treatments/medical-dermatology/oral-corticosteroid-therapy/) may be considered for wider or difficult disease under medical supervision.

Book a review for persistent itchy bumps, spreading patches, painful mouth areas, nail distortion, or scalp hair loss. Seek prompt care for trouble eating or drinking, eye symptoms, rapidly worsening sores, or a lesion that bleeds or fails to heal. Do not stop prescribed treatment suddenly without checking how it should be reduced or changed.

Ask which body sites are involved, whether a biopsy or mouth examination is appropriate, how to protect the skin, and what improvement should look like during treatment.