Why are my teeth sensitive?
Common causes of that sharp feeling with cold drinks — and what can help.
1 min read · 5 October 2026
A short, sharp feeling when you drink something cold, hot or sweet is common. It happens when the inner layer of the tooth (dentine) is exposed or irritated.
Common causes
- Gums that have pulled back and expose the root surface
- Worn enamel from hard brushing or acidic food and drinks
- A cavity, a cracked tooth or a broken filling
- Grinding or clenching the teeth
- Temporary sensitivity after whitening or some dental treatments
What can help
- Use a toothpaste for sensitive teeth twice a day
- Brush gently with a soft brush
- Wait about 30 minutes after acidic drinks before brushing
- Ask the dentist about a night guard if you grind your teeth
When to see the dentist
If sensitivity lasts more than a few days, is limited to one tooth, or turns into pain that lingers, book a check-up. Sensitivity can be a sign of a problem that needs treatment.
These articles are for general information and don’t replace advice from your dentist.
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