Skin Abscess Diagram
An abscess is a collection of pus that has built up within the tissue of the body.  Signs and symptoms of abscesses include redness, pain, warmth, and swelling.  The swelling may feel fluid-filled when pressed.  The area of redness often extends beyond the swelling.  Carbuncles and boils are types of abscess that often involve hair follicles , with carbuncles being larger.