question: I have a lump under my jaw bone next to my chin. I thought it was a sore pimple at first but now it has gotten bigger and feels round. I have only have had it for a few days but it concerns me. I do chew tobacco sometimes but i have never had any sorts of problems. Even my dentist has said my mouth looks pretty good other than a few cavities I have. What could it be? or What should I do?