I have been thru this not too long ago,. After some biopsies, I was told it is scar tissue. Yes scar tissue hurs pretty bad and I still have it goimg on. Even in both ars wheere it seems to rotate from right to left and back.

Since posting this. UPMC, Pittsburgh, Oct 2011 until Jan. I averaged about 2 to 3 surgeries a week there. w Can't have jaw made as bone is deteroriating steaily that is left in jaw. Mersa is to blame. Feeding tube . Had trach for 4mos. Got it out April.
--- Passed away 5/14/14, will be greatly missed by everyone here