question: My doctor ordered a serum protein electrophoresis package test and a ck custom test. I have been having severe bone pain and worsening joint pain (I have lupus sle) ANd I have always had back problems but recently my back pain has gotten SEVERE to the point it hurts to laydown or lean back on it. I am wondering why he ordered these test and what he may be looking for? He ordered my usual test for my Lupus sle for baseline info and he ordered these without telling me why I found out after I got home on my paper work.Now I am concerned.