I was wondering what are symptoms of osteonecrosis of the jaw?

Osteonecrosis of jaw: Onj- the exposure of mandibular or maxillary bone through lesions in the gingiva that does not heal; pain and inflammation of the surrounding soft tissues, and possibly secondary infection or drainage.

Pain swellilng: Pain swelling of the jaw, sometimes exposed bone. Usually after tooth extraction. not always. See oral surgeon to sort things out.