Characteristics, comorbidities, and treatment practices of lichen planus in Northern Finland: A register-based study among 619 subjects.

Background And Aims: Lichen planus (LP) is a common itching skin disease where lesions appear on the skin and mucous membranes. However, the epidemiology of LP is not yet sufficiently understood. The aim of this study was to retrospectively map out the characteristics, comorbidities and treatments of patients diagnosed with LP.