I have also seen the same kind of swelling in individuals that are having a problem with a tooth - or teeth. It typically points to an abscess and can have a great deal of swelling without any pain. Just though I would point that possibility out as well. Take care and good luck!
i owuld take some bendrly now and then wait a hour or 2 two and then if it comes back i would go to your local urgent care and then get checked out. good luck keep me updated please!!!!!!!!!!!!!!