I've got this HUGE canker sore looking thing on the inside of my bottom lip. It has come and gone several times over the last 2 months. Maybe I'm exaggerating, maybe it's only been a month. It doesn't hurt at all... when it "goes" away, it's after it pops, oozes gooey, clear stuff, and then yea~ it's gone for a few days.... only to come back again. Anybody have any idea what it might be? I've had canker sores before, and this definitely isn't one... A google search as made me paranoid that it might be some sort of mouth cancer. Please tell me it isn't that...