Oral mucosal lesion represents a wide array of conditions. They may be the result of a local or systemic infection or trauma or the manifestations of a medical condition or neoplastic growth weather primary or metastatic or may be mistaken for a variation of a normal structure. This study aims to estimate the prevalence of OMLs and describe the risk factors for the development of OMLs in a sample of the Egyptian population Research Question :What is the prevalence of oral mucosal lesions and their associated risk factors in a sample of adult Egyptians?

Inclusion Criteria:

• Adults, 18 years old and above, Egyptian individuals

Exclusion Criteria:

• Individuals refusing to participate in the study. Individuals unable to give accurate or full information due to suffering from acute symptoms, requiring immediate intervention. Individuals unable to give accurate or full information due to any disease preventing them from opening their mouth.

Individuals, above 18 years old, presenting for initial diagnosis to DC of outpatient clinic of Faculty of Dentistry, Cairo university.