Hi Tina, I'm sorry to hear you haven't found a better treatment yet to help with the constant pain. Neuropathy is bad enough and having Parkinson's Disease has to make it even worse. I'm wondering if the following discussions will help you learn something that has helped others and might also help you.

-- Member Neuropathy Journey Stories: What's Yours?: https://connect.mayoclinic.org/discussion/member-neuoropathy-journey-stories-whats-yours/
-- Living with Parkinson's Disease - Meet others & come say hi: https://connect.mayoclinic.org/discussion/living-with-parkinsons-disease-meet-others-come-say-hi/

I think what also might help is learning more about your health conditions and options that may be availble to help. Here are a few sites that have helped me learn more about neuropathy:
-- Foundation for Peripheral Neuropathy: https://www.foundationforpn.org/living-well/lifestyle/managing-peripheral-neuropathy/
-- Neuropathy Commons: https://neuropathycommons.org/neuropathy/neuropathy-overview

Has your neurologist offered any suggestions to see if they might help?