Lichen planus is a common inflammatory disorder that impacts the skin or inside the mouth. It leads to distinctive skin or oral lesions. Lichen planus when occurs on the skin often causes itching. There may be a relationship between the oral form and the skin form. The onset of Lichen Planus may be gradual or quick, but the accurate reason that results in lichen planus is not known. It must be noted that lichen planus itself is not an infectious disease. Therefore, it is not passed from 1 person to another by any means. Lichen planus is not a type of cancer.