About Lichen Planus
Lichen planus is an acute or chronic inflammatory dermatosis involving skin and/or mucous membranes, characterized by flat-topped, pink to violaceous, shiny, itchy polygonal papules on the skin and milky white reticulated papules in the mouth. Skin lesions are often itchy and mucous membrane lesions are often painful. The cause is usually not known but it appears to be due to a disruption in cell-mediated immunity. Medications, metals, and infections ( Hepatitis C) can alter cell-mediated immunity and contribute to the onset of Lichen planus.