Welcome To HealthcareMagic forum,
I would like to know few things over here:
Is the blisters between and side of the fingers.
Are they itchy.
Are the blisters water filled or pus filled.
My initial diagnosis would be POMPHOLYX
,which is allergic condition,but if you can let me know the above answers then I would be able to help you further..It can be treated with topical and oral steroids
,along with antibiotics and anti histaminics.