The doctors say “atopic dermititus” - eczema - and yes, tiny itchy blisters that grow.
In the summer, when my hands get hot, I get tiny blisters between my fingers that itch enough to make me cry.
If I rinse my hands with “Distilled extract of Witch Hazel- Alcohol 14%”, within a half hour the itch is gone the blisters start disappearing.
It was a miracle find for me. It doesn’t prevent the blisters but now I can deal with it.