Dental abscess: the signs, and when it becomes an emergency

A dental abscess is a collection of pus produced by bacterial infection. It most often arises from one of two places: the root tip of a tooth whose pulp has died, or a periodontal pocket in advanced gum disease. In both, the common thread is the body attempting to wall off the infection.

Typical signs

• Constant, throbbing pain that steadily intensifies
• Swelling, redness or a raised bump on the gum
• Marked tenderness when the tooth is touched or bitten on
• A bad taste and odour, sometimes discharge of pus
• A feeling that the tooth has become longer

When an abscess drains, the pain can drop suddenly. This is not healing; the pressure has fallen while the infection continues.

Why antibiotics alone are not enough

Antibiotics bring a spreading infection under control but do not remove its source. That source is dead pulp tissue or a deep periodontal pocket. Unless it is dealt with, the infection returns once the course ends. The definitive answer is root canal treatment, periodontal treatment or, where necessary, extraction.

This does not mean antibiotics are unnecessary. Where there are signs of spread they are vital. Given on their own, however, they do nothing but postpone the problem.

What can be done at home

Rinsing with warm salt water gives relief. A cold compress can be applied externally over the swelling. Heat should not be used; it can accelerate spread. Trying to burst an abscess yourself risks pushing the infection into deeper tissues.

This content is for general information and does not replace an in-person examination. Treatment decisions should only follow a clinical assessment.