Lichen planus is an inflammatory disorder that appears as purplish, flat-topped bumps when it affects the skin. Bumps may appear in clusters or lines.
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
Check out these best-sellers and special offers on books and newsletters from Mayo Clinic Press.
Mayo Clinic researchers drive discoveries that improve detection, diagnosis and treatment. Your quick message to them means so much.