A Tooth Abscess can be referred to as a bacterial infection in a tooth that may lead to accumulation of pus inside its center, which could be very agonizing. It is majorly caused due to poor dental hygiene or a tooth injury, allowing bacteria to infiltrate deep inside. If left untreated, it may cause serious complications to the bloodstream and thus, the brain, heart, lungs or the jaw. Tooth Abscesses can be treated through antibiotics, a root canal or other dental surgery, as the case maybe. It is usually examined by your dentist through an X-Ray, to understand its extent and location.