Welcome to the world of idiopathic (don't know where its coming from or what the cause is) pain. I've been there and I can sense your concern. One thing is clear-and that is your wife is suffering significant pain and it is caused by something! Build on that fact because it is the one thing you know for sure at this point. Hopefully you will find a practitioner that will be interested enough to figure it out and arrive at an accurate DIAGNOSIS which is the start for any legitimate cure. I wish you well.