I was diagnosed with PMT way back in 2001 and was put on 30mg Steroids(Prednisolone), I worked immediately. I had no markers, but some people do not. After 6 months the GP started to taper me down, but the pain came back immediately. In the end I took the steroids for 8 years. I was sent to a specialist at the hospital for back problems who decided I never did have Poly but arthritis and a scoliosis so severe it was given me all the pain everywhere. She gradually got me off the steroids over the next 2 years, but I have been in pain ever since and now take morphine and strong prescribed cocodimol instead.
The side effect of the Steroids is still there, extremely thin skin, that bruises by the touch and at the time I bloated to twice my size. I have flares now and again, but would never go back on the steroids, they are magic pills that mask the pain, but do not cure and you end up not being able to function without them. Morphine of course works similarly but I can't function without something, at least I don't bloat now.