Dental Care

Why Do Teeth Become Sensitive

Patient education

2 min read

Daily habits that can help manage sensitive teeth

Why Can Cold or Brushing Trigger Pain?

Illustration of a cold trigger at exposed dentine and the nerve response inside a tooth; one possible cause of sensitivity — One possible cause of sensitivity. Tap the image to enlarge.

Dentine beneath enamel and root coverings contains small channels connected to the living tissue inside a tooth. Exposure can contribute to sensitivity. The dentist checks for recession, wear, decay, cracks and restoration problems. Brief sensitivity and lingering pain can overlap, so neither the trigger nor its duration is a reliable self-diagnosis.

What Else Can Feel Like Sensitivity?

Sensitivity is discomfort triggered by temperature, sweet or acidic foods, air or brushing. Exposed dentine is one possible cause; decay, cracks and inflammation can produce similar symptoms.

Treatment Depends on the Cause

Desensitising products: An appropriate sensitivity toothpaste or professional desensitising treatment may help after the cause is checked. Response varies. Repairing decay or exposed areas: A filling or bonding may be suitable for a cavity, damaged restoration or selected exposed surfaces. Checking gum health: Gum recession and disease need careful examination. Selected cases may benefit from periodontal treatment or referral. Managing wear: Diet, brushing technique, reflux and grinding may need attention. A protective appliance is considered only when appropriate.

When Should I Have Sensitivity Checked?

Sensitivity products may reduce symptoms, but persistent or worsening discomfort deserves examination. A single painful tooth can have a different cause from sensitivity affecting several teeth. Treatment aims to address the cause while preserving healthy tooth structure. Root canal treatment is not a routine solution for uncomplicated sensitivity; it requires a clear clinical indication.

What Can I Change at Home?

Brush gently twice daily with doctor-recommended toothpaste. Clean between teeth daily with floss or a suitable interdental brush. Avoid tobacco and discuss support for stopping if needed. Arrange dental reviews at intervals recommended for your individual risk. Use gentle brushing pressure and limit frequent acidic drinks. Discuss persistent reflux with your doctor.

Frequently Asked Questions

Can sensitivity toothpaste help?

It may reduce symptoms when used as directed. Arrange a consultation if symptoms persist, worsen or affect one tooth strongly.

Is sensitivity after whitening possible?

Temporary sensitivity can occur. Tell your dentist if discomfort is significant or persists.

Does sensitivity mean I need a root canal?

No. Many causes can be managed conservatively. Treatment depends on an examination and, where necessary, tests.

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