Segmental Lichen Planus: What to Know

Lichen planus is an inflammatory condition that can produce flat-topped or slightly raised purple, reddish, or brown bumps. In a segmental pattern, the lesions are concentrated in a defined band or region rather than spread widely. Itching may be prominent, and scratching can leave darker marks after the active inflammation settles.

The skin, mouth, nails, scalp, or genital lining can be affected in lichen planus. A clinician may inspect these areas and sometimes recommend a skin biopsy because other rashes can look similar.

Use gentle, fragrance-free cleansers and moisturiser, keep nails short, and avoid rubbing or scratching. A clinician may prescribe a topical corticosteroid to reduce inflammation and itch; use it exactly as directed because strength and duration depend on the body site. More extensive or stubborn disease may require another plan, including oral corticosteroid treatment or a different specialist therapy.

Book a dermatology assessment for a new band of itchy bumps, rapid spread, painful sores, mouth lesions, nail changes, or scalp hair loss. Seek prompt care for eye symptoms, difficulty eating or swallowing, or genital sores. Return for review if treatment causes thinning skin, unusual irritation, or no improvement.

Ask whether the pattern needs biopsy, which sites should be checked, how long to use the prescribed steroid, and how to manage leftover pigmentation. Mention new medicines and any mouth, nail, scalp, or genital symptoms.