Question: my dog has a blister between his toes?
Answer: Abscesses Between the Toes (Interdigital Furunculosis) in Dogs. An abscess, or localized infection of the skin, between the toes is also called an interdigital furuncle. It is similar to a severely infected pimple or boil on the face. These painful, pus-filled blisters often occur in the webbing between a dog's toes.