Sore swelling, about the size of a grape under jaw in my neck.?

Lymph or salivary gl: Lymph node most commonly. This area, due to infections over a lifetime in throat, teeth, ears or nose or facial skin, can be chronically slightly enlarged and be normal. In this area it can also be a salivary gland. If it's an enlarged node, it is likely draining an infection or inflammation from something nearby. If swollen grape and no other symptom, get a good check-up with primary care doc.