I do not have your condition but do have various chronic pain issues. One area that is quite intermittent but gets my attention is a nagging pain low in shoulder blade in my back. I have found the TENS unit very helpful. Got it on Amazon for 95$ a few years ago. There are electrode patches - just like EKG electrodes. It is very easy to use. Physical Therapists used to use them all the time. It doesn’t make pain go away forever but it can give me a few hours to a day of relief. The electric current that goes between electrodes sends my brain different signals about my pain. My chiropractor said it was a rib. I am grateful the pain comes and goes away for weeks often. My arthritic back pain stays.