A tooth abscess is a pocketful of pus in the tooth that is caused by bacterial infection. This abscess can occur at different regions of the tooth for different reasons.
This abscess can ensue from an untreated tooth cavity, a tooth or mouth injury or previous dental work.
Dentists will treat a tooth abscess by draining it and treating the infection. Leaving a tooth abscess untreated can lead into serious complications. It can even lead to death.