Steriod -reaction???

Have been stressed out for several years with a progressive all over the body rash  with extreme itching--Have been to several dermotoligist and skin doctor.  I am questioning the steriod drug???  What reaction it could cause --could I be allergic to it??  When on a much higher dosage --I had hair loss- now being on a lower dose-no more hair problem however Have had a rash that has continued to spread all over my body.  I am convinced that it is some medice as a skin removal biopsy came back saying it was sun and Medication.  Could someone give me some info on this drug---Please-This could drive one mentally insane--itch rash-no sleep!!!  Yuk!!!!