There are many reasons why people develop tooth pain. Possible toothache causes include:

  • Cavities or tooth decay;
  • Abscessed tooth;
  • Cracked tooth;
  • A faulty dental restoration (like a filling or crown: so called cap);
  • Teeth grinding or clenching (bruxism);
  • Gum disease.

A toothache can have many reasons — from a popcorn hull stuck in your gums to a broken tooth or even a bacterial infection. Temporary gum irritation can cause some toothaches. But serious toothaches need a dentist or an endodontist intervention.