An abscess is a localized area of infection that can occur anywhere on the body. Dogs commonly get skin abscesses from bite wounds of other animals, penetrating injuries, and entrapped foreign bodies such as grass awns and seeds. The area is usually red, swollen, warm to touch and painful for the dog. Sometimes the abscess can rupture within the body causing a massive, internal infection so make sure you have a vet check it out. Owners may be able to treat some small abscesses in a dog that is otherwise acting healthy at home. However, it is always safer to consult a veterinarian since antibiotics are needed in most cases.