Oral submucous fibrosis (OSMF) is an oral precancerous condition characterized by inflammation and progressive fibrosis of the submucosal tissues resulting in marked rigidity and trismus.Clinicians continue to have difficulties with OSMF because of its unclear etiology and imprecise classification schemes. Several classification schemes based on clinical, histological, or functional features have been reported in medical literature over time. None of these classifications, meanwhile, have been accepted by everyone. Every classification has benefits and drawbacks of its own. In an effort to aid physicians, researchers, and academics in classifying this potentially malignant condition for early detection, prompt therapy, and mortality reduction, an effort is made to disseminate and update the knowledge of the OSMF classification system. Furthermore, pathogenesis andmanagement have also been discussed.