As Kathi mentioned, Peter, I also know the heachaches all-too-well. The thing that really helped mine was a lot of RF'ing (radiofrequencing), along with a ton of nerve blocks and ESIs.

I don't know if it might be something that could possibly help: PT - with some aqua therapy or U/S.

P.S. I forgot to state... my first bout with arthritis had its onset when I was 10. It only worsened with subsequent years. (It probably would have helped greatly if I had been diagnosed properly early on, but... even "professionals" didn't know as much as they do now or maybe they didn't want to believe what totally seems obvious to me.)

One thing I do suggest, if possible, is to do your best to retain as much functioning/mobility and ROM as can be done - without injury or further hurting yourself.