Thanks for writing to us.
I could think of two possibilities in your case
Pompholyx- a type of eczema
where one gets tiny deep seated fluid filled lesions that may get secondarily infected leading to oozing pus and swelling in fingers.
Perniosis or chill blains- only if you reside in cold
Both of these are treatable conditions. The diagnosis can only be confirmed after seeing the lesions
I would advise that you use ask a specialist feature of this website as that would enable you to upload imageso f the lesion and discuss your concern in detail.