My father had this surgery many years ago. I don't recall such pain. If this is nerve related have they tried gabapentin for you? That may take a little while to reach peak effect but is good for chronic nerve pain. I had constant pain around my ear from my SCC tumor growing into bone. One thing I was using prior to surgery was a pain blocking patch called Salonpas. I applied the small ones in front and behind my ear each night. It relieved enough of the pain that I could sleep at night and lasts 8 hours. Good luck to you.