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Itchy bumps that turn into blisters - feet, legs, arms

Hello, I have an issue with itchy bumps that turn into blisters. It began a bit over a week ago, and I thought they were mosquito bites at first, but I kept getting more and never noticed a single mosquito.

After a few days the bumps turn into small blisters that slowly grow until they're a 1-3 mm (not sure yet what happens later), or if they break they just dry up and leave a little mark. In the blister stage they only itch occasionally, and I have to wear shoes, for example, the itch is at first really strong and then gets milder.
I have these bumps/blisters on the top of my feet and toes (not between) in the arch of the foot, around the heel and ankles, and some on the legs. They are not really clustered together. There are also a few on my arms, but these seem to remain quite small (or maybe I've scratched them without noticing and broken them at the early stage). Now I get maybe one or two new itchy bumps a day.

The skin around looks perfectly normal, it is not overly dry, red or swollen. I share the bed with my husband and he doesn't have any symptoms. I haven't been eating anything new, nor am I taking any new medication. I've been searching all over the internet and nothing seems to match the description exactly. I've been putting on hydrocortisone and it seems to help with the itching for a while. One day I also tried taking a cetirizine tablet, it didn't do anything.

Ideas, anyone?
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Avatar universal
Forgot to mention an important differential diagnosis- Dermatitis herpetiformis.
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Avatar universal
Vesicular variant of 'papular urticaria'(bite reaction) is likely. Do consult Doc.
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