Sounds pretty typical to me, Bobert. Doctors are quite often, it seems, at a loss in being able to tell you exactly why something like that is happening...or what can be done about it...but they can give you some drugs so you won't feel the pain for awhile.

The pain is your body telling you that something is wrong.

Now all this tells me is that doctors are...like the rest of us humans...neither omniscient nor omnipotent. But I knew that already.

Have you tried acupuncture yet?