Do you get blotchy/mottled skin, color changes of skin, swelling?
I thought the sensitivity to touch & breezes is a major RSD indicator

I'm interested to hear what our members think.
Did, or do you, use any crutches or a cane often when the foot is bad?
Other possibles -
the bone scan results could be caused from something else.
the limping for many years could impacted spinal alignment & fascia - and those might be causing compressions on the nerves to the foot.
if cane or crutches have been used a lot that might be related to the hand /arm issues.