What Causes Rashes On Body After Taking Zerodol-P And Prednisone?

Im using zerodol-p and prednisone everytime im in pain , this prescription given by my rheumatologist.after several months the pain is on -off everytime it occurs i took zerodol-p & prednisone.ive got fever with temp of 39 to 40 for almost 24hrs.few days back now having rashes all over what does it all about.im planning to visit an internist?