Prolonged use tobacco develops oral cancer. 75% of oral cancers are associated with the use of Tobacco in America.
You will keep increasing your risk of oral cancer with every cigarette you smoke in a day, every day you smoke in an year and every year you smoke in your lifetime.
If you have been a chain smoker for quite a few years, you need to check if you show any signs of Oral cancer.
If you see any of these signs, visit the doctor immediately.