I Have Been Breaking Out In An Itchy Rash And

I have been breaking out in an itchy rash and hives on different areas of my body for the past 10 days, my shoulders, arms and where my waistband and undergarments are tight. It flares up then goes completely away until appearing somewhere else. I have not eaten anything out of the ordinary nor have I changed laundry products or cosmetics. I had an episode of severe swelling due to Crestor about a year ago that went away when I discontinued it. Last September I began taking generic Lipitor again at my Dr.'s suggestion (PCP). I discontinued it and all supplements about a week ago.