Thanks for the query,
You might have developed an endogenous hand eczema.
It is called as pompholyx
Please get you blood eosinophil count
This will help in knowing the exact cause.
Apply a mild steroid lotion like desonide
Also take an antihistamine tablet.
This will give you some 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.