This morning I had a carton of tart yogurt. As I ate it, I felt the tingly feeling you usually get in the corners of the jaw when eating something tart/sour. Only it was ridiculously strong on one side, almost painful. My jaw on that one side (left) felt tingly and almost numb. When I looked in the mirror a few minutes later there was a large lump there, right in front of my left ear. It had not been there before. Since it s Sunday, I decided to wait a bit before rushing to urgent care. It s been six hours, the swelling has gone down but is still there a little when I touch or look closely. It s also tender there and below the jaw. Should I go to urgent care today? Or wait until morning? It s now 3:30pm. I m afraid of an infection or bells palsy or something scary. I should mention I went to the dentist for a cleaning 6 days ago and recently switched to a powerful toothpaste (which seems to have burned my tongue, affecting my taste a little ). Please advise.