I have 8 year PHN on my shoulder and it radiates down my arm to my hand and knuckles. I’ve tried CBD, acupuncture, TENS, Quell, capsaicin, gabapentin, lidocaine...very little relief. I recently started using these arm compression sleeves and they seem to help a bit. Only $5 including delivery if you have prime. Worth a try.
aegend Sun Protection Cooling Arm... https://www.amazon.com/dp/B07SHYJ3Q5?ref=ppx_pop_mob_ap_share