October 28, 2026
Sensitive Teeth: Common Causes and When to See a Dentist
A sip of cold water, a spoonful of ice cream or a hot cup of tea, and suddenly a sharp pain shoots through a tooth. Sensitive teeth are very common, and most of the time they can be managed. But sometimes they are a sign of something that needs treatment.
What is happening
Under the hard enamel is a layer called dentine, which contains tiny tubes leading to the nerve. When enamel wears away or gums recede, these tubes are exposed, and hot, cold, sweet or acidic things reach the nerve and cause that quick, sharp pain.
Common causes
- Brushing too hard or with a hard brush, which wears enamel and pushes gums back
- Gum recession, from gum disease or from age
- Acidic food and drinks, such as fizzy drinks and citrus, which soften enamel
- Tooth decay or a worn filling
- A cracked tooth
- Teeth grinding, often at night
- Recent whitening or a dental procedure, which can cause temporary sensitivity
What can help at home
- Use a soft toothbrush and brush gently, in small circles
- Try a toothpaste made for sensitive teeth and use it regularly, as it takes a few weeks to work
- Spit rather than rinse after brushing, so the toothpaste stays on the teeth longer
- Limit acidic drinks, and drink them through a straw or with a meal
- Wait for about half an hour after acidic food before brushing
When to see a dentist
- The pain lasts a long time after the trigger has gone
- It affects just one tooth
- You have pain when biting
- There is swelling, or a bad taste
- Home care has not helped after a few weeks
What the dentist can do
The dentist will find the cause, which might be a cavity, a crack, gum recession or grinding. Treatment may include fluoride, desensitising treatment, a filling, a mouthguard for grinding or other care. Do not ignore sensitivity in a single tooth, because it can be a sign of decay or a crack.
Book a visit
If your teeth are sensitive, book a check-up at T-Dent Dental Clinic in North Nazimabad. See also our guide on how to brush your teeth properly.
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This article is general information and not a substitute for an examination.