I've got similar issues, but with my left ankle/right knee. Doctors all shrug, say "you're getting older...". It comes in waves, for weeks at a time, then subsides, but never goes away. Eat "vitamin I", stay off pressure points and aggrivating motions, still not much relief. Odd thing is for me, even though these things hurt and hurt a little more when I use them, overall I still find it better to not avoid the motions. Oh well...
Keep on checking in, Tom! As a member of the AWOL brain club, we need all the help we can get.