I had to comment, because I had the very same thing!!! Exactly!
From the time I was about 10 till I was about 21, my ankles only the insides (not the outsides) would itch like crazy. I thought I was alergic to the grass or something, but knew that wasn't it. Finally the only way to stop it was to use alcohol and vow no matter how much they itched not to ever itch them again. It was hard but they are fine now, but you know what if I get real hot and sweaty, they still itch and if I scratch them, they blister up right away....those water blisters you talked about....exactly.......good luck to you.
In the beginning, I thought that's what it was but I've lived in two homes since and now have hardwood floors and definitely no fleas.
Is it possible that you have fleas in your home? I know that when they bite, they leave little red bumps if you are allergic. A girlfriend of mine had fleas in her carpet from her cat and went through the same thing.
X
Maybe eczema or folliculitis
I'd like to, but your description doesn't remind me of anything: not eczema, fungus, bites, allergy, or anything else.
Because the skin is visible, it throws up many inscrutable symptoms. The best we can do about them is is rule out anything serious, and treat the symptoms.
My advice is to use Rhulicream, Sarna, or some other anti-itch preparation, and to show the rash to a skin doctor when you can arrange to do so.
The fact that this has been happening for 8 years without spreading or changing character suggests that nothing significant is going on, just a minor annoyance.
Sorry I can't be of more specific help.
Best.
Dr. Rockoff