Thanks for all the advice, great stuff.
Briefly, in response:
Tried physio's, podiatrists etc, little help there they just tell me dancing is the problem - I know that!!!!!
I have good insoles designed for dancers, I did find some relief a while back after reading about the Gospel of Barefeet Summer time I go barefoot most of the time, wintertime my feet get soft and I have to toughen them up again.

Fish oil could work, I won't take drugs of any kind, I'm a real health nut, I could loose a few pounds, that will help.

The pain doesn't dampen the dancing too much - I'm addicted to SCD, I dance three nights a week and just recently attended my first Winter School.

We press on!!