Why are my teeth sensitive?

Tell the dentist whether discomfort starts with cold air, a drink, brushing, something sweet or biting. Describe whether it stops quickly or continues after the trigger is gone. Pain that starts by itself or interrupts sleep belongs to a different assessment from a brief response at an exposed root surface, although neither pattern is a complete diagnosis on its own.

Location also helps. Several teeth with a similar gum-line response can suggest a shared exposure or wear pattern. One newly sensitive tooth raises more focused questions about a cavity, filling margin, crack or pulp change. These are tendencies, not rules: more than one tooth can have decay, and a single tooth can have exposed dentine without major pulp disease.

Recent treatment, whitening, an injury or a change in brushing products can be relevant. Mention when the symptoms began in relation to that event. A plausible trigger does not make persistent or severe pain harmless. If the discomfort is increasing, ask for reassessment instead of continuing an activity simply because sensitivity was listed as a possible effect.

Repeated acid exposure can contribute to erosive tooth wear. It may come from dietary patterns or stomach acid, including reflux. How often exposure occurs matters as well as what a drink is called. Tell the dentist if you sip acidic drinks frequently or have reflux or repeated vomiting, so dental precautions and any appropriate medical care can be considered.

Excessive brushing force, a hard brush or abrasive products can contribute to problems in susceptible areas. Brushing is still necessary. The aim is to clean effectively without repeatedly scrubbing an exposed surface. A clinician can check technique and identify where the gum line or tooth surface is changing.

Do not respond to sensitivity by using abrasive whitening powders, acidic mixtures or harder brushing to remove an apparent stain. These measures can create further irritation or wear. Avoid aggressive brushing immediately after acid exposure and ask for practical advice that fits your routine. A rigid timing rule is less useful than understanding the exposure and the condition of the teeth.

Grinding and clenching may also be relevant to wear or loading, but they should not become a catch-all explanation. Wear patterns, symptoms and the bite need assessment. The bruxism overview explains that diagnosis separately. A protective appliance, when appropriate, does not repair a cavity or establish the cause of a single painful tooth.

Peroxide whitening can cause temporary tooth sensitivity. That does not mean every painful tooth during whitening has the same explanation. Existing decay, exposed dentine, gum recession or a crack may need attention, and irritation of the gum from gel contact is different from pain felt in a tooth. Severe, localised or continuing pain warrants a dental review.

Follow the instructions for the product and treatment provided rather than increasing exposure in pursuit of a faster change. A pause or change in the protocol may be discussed, but the cause should be checked when symptoms are unusual. The separate whitening-sensitivity guide covers that treatment-specific issue without turning all everyday sensitivity into a whitening problem.

Some people notice sensitivity after removal of deposits during professional cleaning, especially where roots are already exposed. That observation does not mean that cleaning has made the entire tooth thinner. The pre-existing gum condition, deposits and exposed surfaces need interpretation. Persistent or substantial discomfort should be reported so another cause is not overlooked.

For confirmed dentine hypersensitivity, management may begin with exposure control and home care. If needed, a clinician can consider a desensitising application or protection of a suitable surface. A local loss of tooth structure may require restoration, but a filling or crown should not be recommended merely because the word sensitivity appears in the history.

Where decay is present, the lesion and pulp need assessment. A crack requires its own structural decision. Gum disease or recession calls for evaluation of the surrounding tissues and cleaning access. Root canal treatment is considered for a diagnosed pulpal or apical condition, not for every brief cold response. The deep-cavity decision guide discusses the possibility of pulp preservation as well as root canal treatment.

Ask what is being treated, how improvement will be assessed and when a different diagnosis should be considered. A temporary reduction in pain is not proof that the underlying defect has healed. Likewise, recurrence does not automatically mean a stronger procedure is required; the cause may need reassessment.