I had a routine cleaning 2 days ago. During the cleaning, I felt a really sharp ***** (more than the usual sharp ***** during cleanings) in the back lower right (by a tooth which had 3/4 of a root canal 12 years ago (too long to explain, but it bisected a nerve so they didn't finish-a result is that I had TMJ which cleared up in a couple of years. Since then, I've been fine, teeth and gums have been fine too-so no problems going in.) During the cleaning, my dentist took a couple of xrays and all looked fine. But starting that same afternoon and continuing since then, I've had spreading gum inflammation-starting in that lower back area. In addition, my right jaw is pretty painful, especially under the jaw (glands?) on one side only. So I went back to see my dentist yesterday and he couldn't tell what might be happening. He opined that it could be a virus-didn't think it was an infection. Only now, the soreness has spread up behind the upper front teeth too. Feels in the back like when you have canker sores and behind the upper front teeth that I've eaten something too hot (which I haven't). Been taking advil,which is only mildly relieving. Any ideas? Suggestions for relief? Is this pretty worrisome, or is it just like a 7 day virus??? Thanks.