What would cause blistering that festers and stings in pain on my hands?

Doctor can examine: Things that cause blistering on hands or fingers include a type of eczema called dishydrotic eczema, allergic reactions (sometime to unknown substances), chemical irritants (sometimes people don't remember contact with any chemical), reactions to some plants or vegetables, infections (small pimples or abscesses), herpes 1 or 2, burns, etc... A primary care or dermatology doctor can examine hands.