Hi, when i've taken prednisone, I have gotten flushed too. I know this can be a side effect. One woman I know took it and got extremely flushed, hot & red and she said her heart was racing & everythign and she stopped it after 2 days & said never again. A co-worker of mine had the flushing when she got a lumbar epidural injection for a compressed spine nerve. So this is common. Unfortunately, the swelling, weight gain, and moon face are very common things that happen when one takes steroids. If you're aching is getting worse, though, then you should probably tell your doctor. By 4 weeks, it should probably be making you feel better, not worse.