Hi, last night the right side of my face and upper neck (right next to my ear, on my jaw, and right under my jaw) became extremely swollen and tender, totally out of the blue. It s still tender today (slightly less), and some swelling has gone down. I feel pretty fatigued, with intermittent headaches and moments of feeling feverish. Last week on the right side of my neck (in a lower area) I experienced similar swelling, tenderness, fatigue, and moments of fever. About 2-3 years ago I experienced similar swelling and tenderness on my right jaw. Any explanations?