question: Hi there, I have a red rash all over my body - when I itch it leaves red marks, and it has not responded to anti histamine . I thought it might bean allergy to washing powered, but even parts of my body not in contact with fabric are itching. It started as a bumpy, blisters rash between my fingers and ow my whole body. I am worried I might have shingles again? Thank you for ay advice you can offer.