I ain't no doctor and I'm not sure it would help if I were, but when I get weirdness like that it's almost always the precursor of a cold. If it moves to the throat, it's a certainty. Are you getting lots of vitamin C? Tobacco usage uses it up pretty fast, I've read somewhere.
Could be an allergy. Could be the tobacco. I'd quit for a couple of days, then smoke something different when I returned. If that's OK, then smoke the stuff that may have caused your malady. If the same thing happens, you could then unload the tobacco here. Sell it to some poor bastard that we all hope isn't as sensitive as you may be.
Crap happens. I once smoked so heavily that fissures developed on my tongue. Looked like the Grand Canyon in miniature or something. They actually bled slightly from the cracks. Quit for two weeks to avoid having to have my head amputated. But, as always, YMMV (although what distance has to do with anything eludes me.)