Things that can cause sensitive teeth are:
- Wear and tear. Brushing too hard or using a hard-bristled toothbrush can wear down enamel and expose the dentin.
- Tooth decay near the gum line.
- Gum disease (gingivitis). Inflamed and sore gums pull back and expose the roots of your teeth.
- Damage. Chipped or broken teeth may fill with bacteria. The bacteria can enter the pulp, causing inflammation.
- Grinding or clenching your teeth may wear down the enamel and expose the dentin.
- Teeth-whitening products. These products may be major contributors to sensitive teeth.
- Plaque buildup.
- Acidic foods. Food and drinks with a high acid content, like citrus fruits, tomatoes, pickles, and tea, can wear down enamel.