Dude, I've had sore tongue underside before too! It sounds like it might be infected from scraping on your teeth...you should definitely go to the doctor. And tell him how it happened. And post his response for us!
Who gives a shit about penis enlargement surgery...give me a friggin' 3 foot tongue so I can lick her while I'm doing her, and I'd be in heaven.

Is there surgery for this?
BD