Lichen
Lichen planus is a rare skin disease. Although it can be seen in all age groups, it is most common between the ages of 30-60. The lesions generally appear as purple, itchy, slightly raised, shiny papules. The lesions may initially be pinkish but turn purplish over time.
Lesions are most commonly seen on the inner wrists, trunk, inner thighs, and dorsal legs. Lesions may regress spontaneously but may recur over time. Nail changes are also observed in some patients. Nail involvement is often seen as longitudinal striping and splitting in the nails. Involvement of the nail matrix can lead to disruption of the entire nail bed. Pterygium is a very restrictive pattern of nail involvement in lichen planus.
The oral mucosa can often be affected. Lesions inside the mouth may be red, ulcerative or reticular. Painful lesions may appear on the gums. Lichen planus can also involve the genital area.
Topical steroids or intralesional steroid applications are the first choice in the treatment of lichen planus. In cases with widespread lesions, phototherapy can also be added to the treatment. In cases where the disease is severe, immunosuppressives may also be beneficial.