Hello, I have a single non-painful white bump that has shown up on the inner portion of my bottom lip and has been there for approximately 3 weeks. I am worried because I kissed a stranger one drunken night in early December so I don't know if it is the result of that or something else. I also don't know if it could be due to biting my lip. I grind my teeth at night and one night woke up biting my lip. Any thoughts of what this single non-painful bump may be? It feels kind of hard, can not pop, not cauliflower like. It is pretty much a smooth white bump.