Oral lichen planus (OLP) is a chronic mucosal condition usually experience in clinical practice. Lichen planus is expected to show an unusual reaction in which epithelial cells are perceived as outsider or foreign to, secondary to the change in the antigenicity of cell surface. OPL is a mucocutaneous disorder of stratified squamous epithelium of unknown etiology that effects oral and genital mucosal layer, skin, nail, and scalp. Lichen Planus (LP) is evaluated to influence 0.5 to 2 percent of the all inclusive community. With this illness has regularly been accounted for in moderately aged patient with 30 to 60 year old and shows female predilection. It has different oral appearances; reticular structure is most widely recognized. The erosive and atrophic type are less common, yet are destined to cause symptom. Tropical corticosteroids comprise back bone of treatment for symptomatic lesion of OLP. The present article is review on etiology, clinical features, histopathology and management of OLP. We hereby reviewed papers published from year 1983 to 2018 for better understanding of etiopatogenesis of development of OLP and its treatment modalities which includes modern medicine, laser and ayurveda. The articles selected for reviewing consist of both old and recent concept of pathogenesis and treatment plan of oral lichen planus. It also flashes some light on clinical characters and histopathological features of the oral lesion (OLP).