Annular atrophic lichen planus explained

The outer edge may be raised and darker or violaceous, while the centre looks smoother, paler or slightly sunken because the skin has become thinner. Lesions can itch, although discomfort varies, and dark marks may remain after inflammation settles. Other disorders can also create rings or skin thinning, so appearance alone may not establish the diagnosis. A dermatologist considers the sites involved, checks the skin, scalp, nails and mouth for other signs of lichen planus, and may take a small biopsy if the pattern is uncertain.

Use a bland moisturiser, minimise rubbing and avoid applying unprescribed bleaching agents or potent steroid products to thinned areas. Treatment aims to calm active inflammation and itching rather than instantly remove colour change or restore lost skin thickness. A clinician may prescribe a topical corticosteroid with a strength and schedule suited to the body site. More widespread or difficult disease can require another anti-inflammatory plan, including oral treatment, after the expected benefits and adverse effects are reviewed. Keep follow-up appointments so active borders and skin thinning can be compared over time.

Book a dermatology assessment when an unexplained ring-shaped patch persists, spreads, becomes increasingly thin or develops troublesome itch. Seek earlier care for broken skin, bleeding, marked pain, discharge or rapidly increasing redness, because these changes need examination rather than treatment by appearance alone. Report sores or painful areas in the mouth or genitals, and mention new scalp hair loss or nail damage, as lichen planus can involve these sites and management may need to change.

Ask whether the diagnosis needs biopsy confirmation, which part of the plaque is still inflamed and how you should apply prescribed medicine without worsening skin thinning. You can also ask what improvement should look like, whether pigment change is likely to fade, and which new symptoms should bring your review forward.