Can you get oral cancer 6 years after quitting smoking ?

Yes: While smoking dramatically increases risk of oral cancer, many people who have never smoked get oral cancer. The longer after one has quit smoking the more the increased risk is reduced, but there is still significant increased risk after 6 years- see http://whyquit.com/whyquit/A_Benefits_Time_Table.html Early diagnosis and treatment is crucial.

Yes: Risk for oral cancer remains elevated 6 years after stopping smoking, though it does decline from it's highest risk. A 1999 study indicated that after 10 years of no smoking, risk of oral cancer approximates the risk of someone who has never smoked. Drinking alcohol is also a risk factor for oral cancers, so you may want to think about eliminating that risk factor. Keep up the not smoking!! :)

Yup: You can get oral cancer even if you've never smoked.. smoking and chewing tobacco only increase your chances. The damage to the tissues in your mouth may have occurred years ago and take years to become apparent. As time passes, the chances diminish.