Sounds like tarsal tunnel - which could be thyroid - can also be B12 - basically relates to muscle weakness in the foot - so it your arches have fallen that will be a factor - this can alter the way that nerves run through the ankle meaning that they get trapped leading to the pain.
Low in range B12 or B12 Deficiency can apparently be connected to spinal problems, right down to the feet too. Do you know your B12 blood results if they were done ?
Do not class 'fine' or OK as gospel truth, I read daily of Doctors over looking B12 patients. If you are under range with B12 bloods you usually get treatment, but you can still have B12 deficiency if your B12 bloods are LOW 'within range' as many on the PAS and Thyroid UK do.
Idea only, call and ask your Doctor's receptionist for your B12 blood result and range, The range is important.
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