I have a round bulge on the inside part of my gums but low down that extends out under my tongue slightly.  It is hard to move my tongue to that side of my mouth well, and there is also a slight hard bulge protruding behind my jaw bone under my throat that may be just an extension of it. It hurts, and it hurts to bite down on that side and constantly feels like thats the only teeth that hit.
Thanq for your query but I just want to know if the bulge u were describing is hard or soft. If It's hard then it's called Tori which has to be surgically removed if it causes discomfort. On the other hand, if the bulge is soft then look if there are any decayed teeth or loosened tooth in that area and visit a dentist nearby.