Background: Oral cancer is a malignant neoplasm that may affect the oral cavity. The most affected sites are tongue, floor of mouth, and lower lip. The present study was conducted to determine effects of or habits on oral cancer. Materials & Methods: The present study was conducted on 863 subjects of both genders. Cases of leukoplakia and erythroplakia were selected. General information such as name, age, gender etc. was recorded. Habits history such as smoking and alcohol was obtained. Results: 287 patients had habit of alcohol intake, 103 had disease. 387 patients had habit of smoking, 250 had disease. 189 patients had tobacco usage habit, 90 had disease. Age group 20-30 years, 71 had habit of alcohol, smoking (75) and tobacco (45), age group 30-40 years had habit of alcohol (72), smoking (80) and tobacco (70), age group 40-50 years had habit of alcohol (72), smoking (80) and tobacco (70), age group 50-60 years had habit of alcohol (84), smoking (116) and tobacco (37). Out of 287 patients 81 had erythroleukoplakia, out of 387, 113 had disease and out of 189 cases 9 had disease. Out of 287 patients 22 had erythroleukoplakia, out of 387, 137 had disease and out of 189 cases 81 had disease.  Conclusion: Both Smoking tobacco and alcohol intake leads to oral cancer. Smoking and alcohol are major risk factor for leukoplakia and erythroplakia.
Key words: Alcohol, Leukoplakia, Tobacco.