The cause of my TOS, we believe, was from a medical procedure that was done while I was under anesthesia. It was an immediate reaction. Hospitalization in traction and alot of misdiagnosis. I had disc replacement before the TOS diagnosis. After surgery, one year later, I had become pain free. I did not have any work related incidents or anything else to have caused this. We recently drove to FL which was extremely stressfull. I drove most of the way there and back. I noticed being VERY tense in my neck and arms during the drive. My neurologist said this may have brought on a relapse. I don't know. That was why I posted. Hoping I could get some info from anyone who may have had this experience. I am VERY lucky to have had this time pain free. Also, I am not as bad as I was, or as bad as I KNOW others are. Therapist said something about a disc problem, but, I feel the same as before. I asked for an MRI but doctor said it won't show anything. Just kind of stuck and hoping. Thanks for all of your input. Linda