Every year, how many teenagers get oral/mouth/tongue cancer?

Oral cancer. There seems to be a trend and demographic shift in younger patients showing up with head and neck area esp oral cavity cancers partially attributed to smoking patterns and prevalence of hpv (human papilloma virus) and other reasons for this shift are not fully understood.
Rare, but. Rare. See oral surgeon or ENT doc if you have any of these symptoms: Persistent mouth sore, persistent mouth pain, a lump or thickening in the cheek, a white/red patch on the gums, tongue, tonsil, or lining of the mouth, a sore throat, hoarseness or feeling that something is caught in the throat that does not go away, difficulty swallowing/chewing.