Length dependent, sensory motor, axonal, chronic polyneuopathy is a form of peripheral neuropathy. Have you looked into FDA approved Qutenza for your PN pain issue? Scrambler therapy? Both have been demonstrated effective in those with painful PN, though, of course, they don't work for everybody. I am making no recommendation as to clinics/clinicians, but both therapies are available at various locations in the USA, as well as Europe. It is important for people to do their own research and review the relevant data on their own. Good luck.