OSMF is a distressing condition in which due to limited opening of the oral cavity, the patient is neither able to consume a normal diet nor maintain proper oral hygiene. OSMF mostly occurs in Asian countries, including India ,China, Pakistan, Sri Lanka and Bangladesh, where chewing betel quid (areca nut , tobacco, slaked lime, or other species) is very popular & accepted as form of tradition in most part of these countries. It is observed that irritants like betel nuts, tobacco etc. if kept for longer period around the cheek and swallowed gradually may play a major part in the causation of the disease.