@mrmacabre
I have small fiber neuropathy and many other issues like you and can empathize about the frustration.

My thoughts about tattoos (I have a couple myself), is that the needles irritate the small fibers in your feet, swelling occurs which compresses the small fibers (like wearing compression socks), and you get a sensation of less nerve pain for a period of time until the swelling goes down. I don’t know if the same happens when people get acupuncture (never had it before and believe the needles are thinner than tattooing needles).

Have you gone to a neurologist for a skin punch biopsy to diagnose small fiber neuropathy?