Ok, it's on your cheek, you've been dipping or smoking. Time to quit playing David Letterman's "Is This Anything" and get it checked by an ENT/Biopsy.

Had a similar deal going on about 6-8 months ago, this is after 2 cancer surgeries and etc. White spot with rawness, both the Oncologist and the ENT were concerned. General anesthetic, 45 minute procedure, it was out. Pathology said Lichen Planus, but now I don't have to worry about that anymore. 2 Weeks later, better than new.

I've used this before, but once Joe Nameth said not knowing what was wrong with his body was worse than knowing what was wrong, even if it was something bad. Save yourself a lot of worry and get it checked.
Bob

SCC Tongue, stage IV diagnosed Sept, 2002, 1st radical neck dissection left side in Sept, followed by RAD/Chemo. Discovered spread to right side nodes March 2003, second radical neck dissection April, followed by more RAD/Chemo.