Thanks for the query,
You may be suffering from scabies.
Sometimes it remains as a chronic infection and presents as recurrent blisters
Itch is the commonest manifestation.
You can use permethrin cream
Apply it overnight as a single application.
Also take some anti histamine
This will give you relief.
Please meet a dermatologist
for exact diagnosis.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.