Most oral cancers are this type. 90% arise from the surface of epithelium. Red, raised, eroded, suspicious for cancer. Lesion that does not heal in 2 weeks or lump or thickening required further eval. Major risks- advanced age, tobacco, alcohol, some occupations (textile workers, palmers, coal and metal workers), sun exposure, poor nutrition intake, poor oral hygiene, HPV infection, periodontal or gum disease