Since you are not getting better, and it is traveling around, it might be that your diet needs looking at.
Gluten intolerance can cause peripheral neuropathy.
We have a gluten forum here:
http://neurotalk.psychcentral.com/forum13.html
The first post in the sticky has The Gluten File in it. A wealth of information.
I know two posters from the old board who had PN and improved with going Gluten free.
I think it would be worth a trial for you.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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