I currently have tendonitis in left shoulder (don't remember the technical name describing the specific tendon) - last spring it was bursitis in both hips - which rheumy treated with steroid injections, and they provided some extended relief, but it hasn't been a complete cure. Rheumy also offered to inject the shoulder in October - but I declined, hoping to resolve it with heat and stretching and rest, which is not happening. And I am losing more ROM, so I'll have to do something soon.
Now it feels like I have costochondritis again - probably from trying to exercise with the airdyne bike and using my arms after an extended period of not exercising due to fatigue and pain problems. More tendonitis?
Lynnwood, the places you describe are also "jointed" areas - have you had any RA labs lately? I don't get hot red joints joints often, and when I do they are generally in fingers and toes - but I do get warmth in painful areas - sometimes it's in the joint, but often it's over muscle and tendon. RA labs are mildly positive now - they've been negative for 3 yrs prior.
I am as confused as you are as to what is behind all the tendonitis....my rheumie is rather vague about it as well. I have assumed it's just a manifestation of inflammation, a it seems to be too widespread to be "over-use". If I was a mail carrier, maybe......
Anyway - you've mentioned tapering your Pred, and your areas sound pretty widespread.....could it be an inflammatory reaction to the taper? Just a thought.