Is My Tooth Infected? Clear Signs You Shouldn’t Ignore

July 16, 2025

A tooth infection means bacteria are inside your tooth or gums, often causing pain, swelling, and sometimes fever. How do I know if my tooth is infected? Look for these common, reliable signs.



How Do I Know If My Tooth Is Infected?

  • Severe, throbbing toothache: Pain that lingers and may spread to your jaw, ear, or neck.

  • Sensitivity: Increased pain when eating hot, cold, or sweet foods; pain when biting or chewing.

  • Swelling: Gums, face, or jaw look puffy or feel tender near the problem tooth.

  • Red or swollen gums: Gums may also have a pimple-like bump or ooze pus.

  • Fever: Sometimes paired with general discomfort or swollen lymph nodes in the neck.

  • Bad breath or foul taste: Odor and bad taste that brushing doesn’t fix.

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