Last night I discovered a lump slightly underneath the left side of my lower jaw bone about halfway between my chin and where my upper jaw meets my lower jaw. It is hard, but painless, and feels like it's attached to the bone. Does anyone know what this could be? I'm very concerned.
It could be some sort of cyst. How old are you? I would suggest going to a dentist and getting a panoramic x-ray done, if it is in fact affecting the bone they should be able to see something. It sounds like it is on the ramus of your mandible?