Yes! I used Watkins Pain Relieving Liniment Spray for years before my Severe Axonal PN diagnosis and it ALWAYS relieved - to an extent - that painful burning on the soles of my feet. I'd explain this to my podiatrist and general practitioner and of course they were completely uninformed about PN and were convinced I must be rubbing it in and that the rubbing was what was helping. Now, years later and after my 2021 diagnosis via EMG, I'm taking prescription medications for the pain, numbness, and burning ~ but I KNOW that peppermint extract worked. Blessings to you and your wonderful wife!