Have you tried a TENS unit cranked up to the “ZAP!!!” setting?
I have one and you’d have to fight me to the death for it....:))
2 Hours of cheerfully electrocuting my lower back and I’m good for *days*.
“They” don’t know how/why it works and *I* don’t really care...it hasn’t killed me yet....LOL
[I even taken it with me on the Harley. The wires go under my shirt and the small unit clips on the waistband of my pants. It’s gotten me home many a time when I otherwise wouldn’t have made it]