Inclusion Criteria:  . The patients with clinical or histopathological diagnosis of bilateral atrophic or erosive OLP (symptomatic OLP) who signed the written consent form were recruited.  Exclusion Criteria:  Patients with drug-induced or contact lichenoid reactions, patients receiving any treatment for OLP in 2 months prior to the study, pregnant or lactating women, patients with uncontrolled systemic disease, and patients with photosensitivity