How do I know if I have decayed teeth?

by | 28 Jan 2026

You may have tooth decay if you notice any of the following signs, but a dentist is the only one who can confirm it:

Common signs of tooth decay

  • Toothache (persistent or occasional)
  • Sensitivity to hot, cold, or sweet foods
  • Visible holes or dark spots on the tooth
  • Rough or sharp edges you can feel with your tongue
  • Bad taste in your mouth or bad breath
  • Pain when biting or chewing
  • Food getting trapped easily in one area

Early decay often has no symptoms.

Many cavities start without pain, which is why regular dental check-ups are important.