I suffered from intense chemo induced peripheral neuropathy and was told "apart from pottering around, you may never walk again." I set about trying to fix this (with what seemed like a crazy long term aim in 2013 to be able complete the camino frances
) along with a bucket full of painkillers I had been prescribed. I have now done the Frances, Norte, Portuguese, Camino Mozarabe from Malaga, Levante from Valencia and the Salvador and Primitivo from Leon. Now I don't take any painkillers. I pushed myself through the pain and I noticed a marked improvement (less pain) towards the end of the Frances and went back and did the Norte the following year and it basically cleared up and I am still left with minor neuropathy. What worked for me was..after every day I soaked my feet in cold water - ice water if I could get it. I carried my own collapseable water container big enough for my feet, carried on with the prescription pain killers but only for the French route, used a foot menthol balm after the cold bath, experimented with different sock combinations (wool works best for me) used vasaline on the feet everyday before walking, good solid walking boots work for me. The doctors in the pain clinic couldn't really give me a solid explanation....other than "oh well it may have been going to clear up anyway or that the intense walking helped to activate the nerve ends" and hence reduce the pain. I hope you find something that works for you.