Pain as therapy for neuropathy?

I know, the title of this thread doesn't sound like it makes any sense does it? With all of the garbage that I've got going on in my life, osteoarthritis, undiagnosed neuropathy in my feet, lactose intolerance, digestive issues, and a few other "quirks", I've been called a medical mystery, or a conundrum by multiple doctors over the past 20 years.

I'm living in chronic pain 24/7, 365 days a year, but there is something that actually helps, temporarily, stop the nerve pain in my feet, getting tattooed. I've been getting tattooed for the past 25 years, and I realized about 6 or 7 years ago that every time I had some work done, the nerve pain in my feet would disappear for 2 or 3 days.
I began to notice that I was aware of the pain in my feet starting to go away while I was being worked on. After I was done being tattooed for 1 1/2 to 2 hours, my nerve pain was gone. It's 'frickn awesome, I can walk without pain in my feet and lower legs just like a normal person does.
Sometimes this would last 3 or 4 days, or only for a day or 2, but I didn't care, my nerve pain was gone. However, when the pain did come back, it was more intense that it normally was for a couple of days.
I've asked my regular doctor, my neurologist, my orthopedist, and my neurosurgeon if they've ever heard this before, and they all had no idea how or why this would happen. I'm just a medical mystery. I can't tell you how frustrated I am, my doctors have no answers, and nothing is getting any better.

Has anyone out there ever heard a story like this before, or have a reason as to why this happens to me?