In reply to Tall Clare: Totally agree with you on the diagnosis.
This bugged me for over a year and my Podiatrist came up with one answer, Diabetes nurse another, neither treatment worked but my GP correctly identified the problem.
I had a cortisone injection, painfull but worth it and I'm well on the mend. Not a 100% but around 80% and it takes a few weeks.
It doesn't work for everyone, nor forever but it's working for me at present.