I am sorry you have PN. I do too, but I have found some relief. MrsD is correct about B12. For over a year, I have seen a doctor called a physiatrist. The deal with pain first, then try to treat the whole body at a cellular level. This doctor reduced my pain. Last summer I had to be pushed in a wheelchair at the state fair...this summer I am walking much better.
I take B12 injections weekly, and a few other suppliments. Also know that I didn't believe in suppliments at all. My PN was caused by a surgery that didn't go very well, and three torn tendons in my ankle. I have healed wrong.
I can't say that my symptoms are gone, but they are definately better than what they were. Yes the suppliments can be costly, but there are sites recommended on NT. for the best prices.
I hope you find some answers that work for you. Keep hope alive that something can be done. ginnie