Oral submucous fibrosis (OSMF) precancerous circumstance and is chronic, resistant disorder characterized by juxta-epithelial inflammatory reaction and modern fibrosis of the submucosal tissues. it's miles associated with juxta-epithelial inflammatory reaction observed with the aid of fibroelastic changes inside the lamina propria layer, in conjunction with epithelial atrophy which ends up in stress of the oral mucosa proceeding to trismus and problem in mouth establishing.” different phrases used to explain this situation are juxta-epithelial fibrosis, idiopathic scleroderma of the mouth, idiopathic palatal fibrosis, submucous fibrosis of the palate and pillars, sclerosing stomatitis, and diffuse OSMF. Oral submucous fibrosis (OSMF) is an oral precancerous circumstance characterized by means of inflammation and modern fibrosis of the submucosal tissues ensuing in marked stress and trismus.