When it happened, the shingles, it was incredibly itchy painful at the beginning which tapered off to only a bit itchy over the course of the rash. I was reading my Encyclopedia of Herbal Medicine. I don't remember which was the most helpful herbs and got into a habit of making this heated infusion, like a tea. Fill a pint container with water and 1/3 cup lemon juice, 1 minced clove of garlic, 1 t rosemary, 1 t thyme, 1 T lemon balm. Heat it up in the microwave for 2 minutes, then let it cool. Take a clean washcloth or cotton pads, and apply it to the rash, once in the morning, once before bed. This relieved the pain. It can be used as often as you like, for instance, in the beginning it is much more painful itchy, and that comes back faster, so we applied it more often. I prepared a new batch about once a week. He said it really helped and kept the itch away most of the time.
I hope that helps.