Sensitive teeth: what it may mean
UniDent editorial team · July 27, 2026
Medically reviewed by: Dr Aleks Aleksiev · reviewed July 27, 2026
Sensitivity has many possible causes, from exposed necks of teeth to decay or a crack. This article cannot tell you which is yours and does not diagnose. But one distinction is worth knowing: a brief jolt from cold behaves differently from pain that lingers after the trigger is gone.
Brief pain, or pain that lingers
Sharp pain from something cold that passes within seconds is one thing. Pain that continues for minutes after a cold drink, or wakes you at night, is different and usually means the nerve is involved.
What can lie behind sensitivity
- Exposed necks of teeth where gums have receded.
- Decay.
- A broken or leaking filling.
- A crack in the tooth.
- Enamel wear — from brushing too hard, or from acids.
- Grinding your teeth.
Each of those calls for different treatment — and some call for no treatment at all, just a change of habit. That is why the examination matters: without it, any "treatment" is guesswork.
When not to put it off
- The pain lingers well after the trigger.
- It wakes you at night.
- There is swelling or a bad taste.
- The tooth has changed colour.
What helps at the examination
Say which tooth or area, what brings it on, how long it lasts and since when. If you use a sensitivity toothpaste, say for how long and whether it helps — that is information too.
What to do next
- Note whether the pain passes immediately or lingers.
- Describe what brings it on: cold, heat, sweetness, chewing.
- If it wakes you at night, do not wait — seek an examination sooner.
Sources
- Учебни програми по орална диагностика и консервативно зъболечение (публична информация)