Welcome here.
We have a peripheral neuropathy board here:
http://neurotalk.psychcentral.com/forum20.html
Since this is so long standing however, there may not be much that can be done at this time.
Some people react to joint replacement, or other hardware put into the body, with autoimmune reactions. If these are caught early before destruction of nerves gets too bad, some functions may be spared. Tests for this involve blood work and measurements of certain Ig fractions.
Another cause may be low B12 levels. In the US normal is considered pretty low. So people in the 200 range are not offered treatment, when they should be.
Please visit the PN forum and give some more details about your father. Some of the members have autoimmune issues and may be able to help.
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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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