Tooth sensitivity

A sudden change is worth investigating instead of treating with toothpaste alone. Common causes include a new area of recession, a cracked or leaking filling, decay, recent dental treatment, whitening, or a change in diet or reflux increasing acid exposure. Grinding can also produce a fairly sudden onset. The reason to be examined is to distinguish genuine dentine sensitivity, which is manageable, from pulp inflammation or a crack, which are not the same problem.

For genuine dentine hypersensitivity it generally helps, but it needs consistent use over weeks instead of occasional use, and technique matters: smearing it onto the sensitive area and not rinsing afterwards is more effective than brushing and rinsing it straight off. What it does not do is address why the dentine is exposed, so if recession, erosion or a defective restoration is driving it, the underlying process continues while the symptom is masked.

The most useful distinction is duration. Sensitivity is a sharp pain that stops almost immediately when the trigger is removed. Pain that lingers for seconds or minutes afterwards, pain provoked by heat, spontaneous pain, or pain that wakes you at night are patterns associated with pulp inflammation, not sensitivity, and they need assessment. Sharp pain specifically on releasing a bite suggests a crack. Describing which pattern you have is more useful than describing intensity.

Sensitivity during and shortly after whitening is common and is usually temporary, resolving after treatment finishes. It tends to be worse with higher concentrations, longer wear times, and where roots are already exposed by recession. It can often be managed by reducing frequency, using a desensitizing product alongside, or pausing instead of stopping. Persistent sensitivity long after whitening has finished is worth having examined for another cause.

No: heavy brushing is one of the more common causes of the problem. Abrasion at the gum line from a hard brush, an abrasive paste and a scrubbing action wears away tissue and exposes dentine, and recession from the same habit makes it worse. Plaque is soft and comes off with a soft brush used gently and thoroughly. If your teeth feel rough or unclean despite brushing, that is worth investigating instead of compensating for with pressure.

Yes, though not always by grafting. Where recession is stable and the main issue is sensitivity, desensitizing treatment, fluoride varnish, sealing agents or a bonded restoration over the exposed area are often sufficient. Gum grafting is considered where recession is progressing, where there is very little firm tissue left, where the root is decaying, or where appearance matters. The cause, usually brushing force or a bite factor, should be addressed either way.

Exposed dentine tubules respond very readily to cold and to sweet or acidic stimuli through fluid movement within the tubules, which is the mechanism behind classic dentine hypersensitivity. Heat sensitivity, particularly when it lingers, points toward a different and generally more significant process, pulp inflammation, which is why heat-triggered pain is taken more seriously and examined, not simply managed with a desensitizing product.

Not necessarily, though decay can present as sensitivity before any other symptom appears, which is exactly why new sensitivity deserves an examination instead of an assumption either way. Recession, erosion, a cracked or leaking restoration, recent dental treatment and grinding are all common causes that have nothing to do with decay. The pattern, brief and stopping immediately versus lingering, helps distinguish these possibilities, but a proper look and radiographs settle it.

It is common, mainly because gum recession exposing root surfaces and cumulative wear on biting surfaces both increase with time, and because the pulp itself tends to become less reactive and more prone to other changes as we age. This does not mean sensitivity should simply be accepted as inevitable. The underlying cause is still worth identifying, since management differs depending on whether recession, wear, erosion or something else is driving it.

Indirectly, yes: stress is strongly associated with clenching and grinding, both of which can wear enamel at the biting surfaces and flex teeth at the gum line in a way that contributes to sensitivity over time. Stress does not directly expose dentine on its own, but a grinding habit driven by stress is a genuine and modifiable contributor worth mentioning if sensitivity has developed or worsened during a stressful period.

It depends entirely on the cause. Sensitivity from a recent filling or from whitening commonly settles within days to weeks without specific treatment. Sensitivity from ongoing causes, active recession, an eroding diet, unmanaged grinding, or a cracked restoration, will generally persist or worsen because the underlying process is still active. Waiting without identifying the cause risks missing something that is progressive instead of self-limiting.

Most desensitizing toothpastes are gentle and do not typically cause an initial worsening, but consistent use over several weeks, not occasional application, is what allows the active ingredient to build up its blocking effect on the exposed dentine tubules, so an apparent lack of improvement in the first few days is not unusual and does not mean the product isn't working.