Well there's a new theory that I am just investigating. I have 4 surgeries since 2007, and I have more titanium in my neck than robocop. They use titanium because its strong and supposedly hypoallergenic. But I just found out 4% of people, 1 in 25, actually do have allergic reactions to it as it dissolves over time. My PCP has a theory that all of that metal may have brought on an allergy to the metal. The symptoms match mine exactly. So I am going for an allergy test. Not sure what will happen one way or another. My orthopedic surgeon does not want another surgery. So we need to find out if there are medications to address it if it is indeed an allergy. Keeping my fingers crossed! and thanks for the reply, I'll keep everyone posted.