It is just another way of looking at the problem. I was itching for Britain up until a couple of months ago.
In my case we changed soap, detergent, shampoo, bedding and towels. Nothing worked.
.
Then I started thinking what about food and kept a food diary.
It was literaly eating one Malteaser that sent me on the right path. I had a bad reaction to it and it was the only thing I ate one evening. I immeadiately removed dairy form my diet ... the problem solved within hours.
No more itching.
The follow on is we now spend a great deal of time reading labels in the supermarket.