Blocked airway. Mucus can form behind a tumor or foreign object in your windpipe and cause an abscess. If bacteria get into the mucus, the blockage stops you from coughing it out. Blood-borne causes.

An abscess is a pocket of inflamed tissue filled with pus. Abscesses can form anywhere on the body (both inside and outside). They’re most commonly found on the surface of the skin. An abdominal ...