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Lichen planus - Overview

Definition of Lichen planus:

Lichen planus is a disease in which there is an itchy, swollen rash on the skin or in the mouth.

Causes, incidence, and risk factors:

The exact cause of lichen planus is unknown. However, it is likely to be related to an allergic or immune reaction.

Risks include:

  • Exposure to medications, dyes, and other chemical substances (including gold, antibiotics, arsenic, iodides, chloroquine, quinacrine, quinide, phenothiazines, and diuretics)
  • Disorders such as hepatitis C

Lichen planus generally affects middle-aged adults. It is less common in children.

  • Reviewed last on: 10/3/2008
  • Kevin Berman, MD, PhD, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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