OP: I don't have RSI but live with chronic OA shoulders and elbows, so for one thing I only sleep on my back, all night. Probably some bursitis in there as well.

I know a lot about PRP injections, and Prolotherapy in general, and that's a possibility for you to find a provider in your area. Sadly it's not covered by insurance but many manage to get these treatments. And they work for a lot. I've had a few in my life but can't afford them.

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