You need to have your B12 and Vit D tested. Some PN occurs when B12 is low. And Vit D helps with pain issues.

Get your numbers for both tests. In the US the lab ranges have not been changed and updated to the new acceptable "low" of 400pg/ml. Doctors are still telling patients that 200 to 400 is "normal" and significant damage can result at that low level.

This is my B12 thread:
http://neurotalk.psychcentral.com/thread85103.html

If you are using or have used RX drugs that cause PN, like certain antibiotics and statins, those can be changed, and you may heal up eventually.
Many of us use some nutrient support, but those must be chosen wisely, based on your lifestyle, drug use, vaccine history, prior illnesses, etc. There are over 100 causes of PN. Only the hereditary types, have no supplement support or drug treatment at this time. But the future may hold some hope for that yet.

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The 3 most commonly low nutrients in all Americans are B12, Vit D and magnesium. Attending to these first often brings some relief to many people. If these fail to work after 3 months, then moving on to other supplements can be tried.