I was exposed to PI 3 weeks ago and had a bad case with oozing blisters and swelling on my arms.  I was wearing gardening gloves with short sleeves when I came in contact.  My doctor prescribed Prednisone and cortisone cream and recommended soaking to dry the blisters.  All this helped and the blisters are gone.  My skin is only pink where the swelling was.  2 days after finishing the Prednisone I have started terrible itching all over my body again.  I have little red marks where I am itching.  I've never had any other skin problems before, could this still be from the PI exposure from 3 weeks ago?