What causes lichen planus of the skin?
The causes of skin lichen planus are not known. Allergic reactions to medications for high blood pressure, heart disease, and arthritis may cause lichen planus. In those cases, identifying and stopping use of the drug helps clear up the rash within a few weeks. Most cases of lichen planus go away within two years. About one out of five people will have a second attack of lichen planus. 3. How is lichen planus treated? There is no known cure for skin lichen planus but treatment is often effective in relieving itching and improving the appearance of the rash until it goes away. The two most common methods include the use of topical corticosteroid creams and antihistamine drugs taken by mouth. More severe cases of lichen planus may require stronger medications such as cortisone taken internally or a specific form of ultraviolet light treatment called PUVA.
