<s>[INST] i have a pea like bone under jaw bone..when u feel with thumb it detached and feels has moved ..u can feel on the other side too..not so much lumpy but hard like pea and bone..it seems to move..no pain at all just felt while resting thump on both sides of jaw [/INST] Hi! Welcome to Chat Doctor. I read your query. You have not specified exact location where you feel bone fragment under jaw bone. This can be Tori or exocytosis. These are bone growths in jaw. Usually inner side of lower jaw near premolars or buccal side of upper jaw. They are usually asymptomatic and do not require any treatment. However, if there is irritation or ulceration on its overlying mucosa, it can be reduced by a small procedure. For accurate diagnosis, I suggest you to visit a dentist and get it checked. Hope the answer helps you. Thank you! </s>