Have you ever tried meditation? For me, it's completely redefined my relationship with pain. I realized how little of my pain was physical. The vast majority was my mind exaggerating the physical pain that I felt. I now see how monks are able to self immolate without reacting to that pain. I don't have anything approaching their ability, but I have been able to entirely stop taking pain killers and I had a serious injury misdiagnosed because the doctor didn't think I was exhibiting the pain associated with that injury.