Lousy breath
If the infection is maintained for too long, the pressure inside the tooth abscess becomes excessive, and it might rupture. When a tooth abscess ruptures, it is possible you will feel less pain, but you may start having a salty and unpleasant taste in your mouth. That is probably the tooth abscess draining its contents into your mouth, and it is a major cause of lousy breath.
Bad breath is also common in cases of gingivitis and tooth decay. Thus, it is very important you do not take anything for granted and talk to your doctor right away. Do not forget that tooth abscess may progress into worse conditions, as you will see next.