Cigarette, cigar, or pipe smokers are six times more likely than nonsmokers to develop oral cancers.
users. Users of dip, snuff, or chewing tobacco
products are 50 times more likely to develop cancers of the cheek, gums, and lining of the lips.
Excessive consumption of alcohol. Oral cancers are about six times more common in drinkers than in nondrinkers.
Family history of cancer.
Excessive sun exposure, especially at a young age.