Lichen planus is a condition characterized by itchy flat pink to slightly violaceous patches and bumps. Wrists and ankles are commonly affected areas but also it can involve the mouth, scalp, and outer areas of the lower legs as well as the genital area. Many medications can trigger a lichen planus-like eruption. Treatment of lichen planus may include systemic cortisone, phototherapy, as well as systemic medications, including Cyclosporin. Dr. Crotty has a special interest in lichen planus and has published an article regarding the treatment of lichen planus.