I have a HORRIBLE head to toe skin rash after having sinus surgery on Thursday morning. Literally every square inch of my body is covered in little red bumps, especially on my back behind my ears and on my chest. I am miserable. The doctor's nurse told me to take Benadryl and I have been taking that for almost 24 hours along with a cool epsom salt bath. She claims that I had an allergic reaction to the anesthesia since none of my meds changed. I have fibromyalgia and chronic fatique immune dysfunction disorder.