Bullous lichen planus.

Sir, Lichen planus (LP) is a chronic inflammatory dermatosis involving mucocutaneous surfaces and nails. The world-wide prevalence of the disease is estimated to be 1%.[1] Bullous lichen planus is a rare variant which usually presents with blisters occurring over typical lesions of lichen planus. Raely, a few lesions occur in the adjoining skin. It is to be differentiated from lichen planus pemphigoides in which the blisters are more generalized and extensive and the course is prolonged.