I started with a random itch on the right side of my head and it spread to my neck and and has continued to spread all over my body with tiny blisters. This has been going on for 3 weeks and now bruises are showing up everywhere. I'm very itchy and nothing seems to help. I've been to 3 different doctors and no one seems to know what's wrong. One doctor thought I had shingles but I have no pain and the itchy bumps/blisters are everywhere not just one side of my body. Any idea what I can do to stop the itch Im Going crazy?