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Symptom Guide

Why Are My Teeth Sensitive ?

Sensitivity to hot, cold, sweet, or acidic foods is one of the most common dental complaints. The cause is usually exposed dentin or a problem with a specific tooth. Knowing which one matters for getting the right treatment.

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Common Symptoms

  • Sharp pain triggered by cold drinks or air
  • Pain when eating hot foods or drinks
  • Sensitivity to sweet foods
  • Sensitivity when brushing or flossing
  • Pain that disappears within seconds of removing the stimulus
  • Sensitivity that lingers after the stimulus is gone
  • Sensitivity in a single tooth (often signals a problem with that tooth specifically)
  • Sensitivity across multiple teeth (often signals enamel wear or gum recession)

Possible Causes

  • Enamel erosion from acidic foods and drinks
  • Gum recession exposing root surfaces
  • Aggressive brushing technique wearing down enamel and gums
  • Worn-down enamel from grinding or clenching (bruxism)
  • Cracked tooth syndrome
  • Recently completed dental work (typically resolves in 1-2 weeks)
  • Cavity reaching the dentin layer
  • Failed or worn filling
  • Whitening treatment (temporary, typically resolves in days)
  • Acid reflux (GERD) exposing teeth to stomach acid
  • Bulimia or chronic vomiting eroding enamel

Treatments at Our Office

  • Sensitive toothpaste with potassium nitrate or stannous fluoride for daily use
  • Fluoride varnish or in-office desensitizing treatment
  • Switching to a soft-bristled toothbrush and gentler technique
  • Custom nightguard for grinding-related sensitivity
  • Filling for cavity-related sensitivity
  • Crown for cracked or severely worn teeth
  • Treating underlying gum disease if recession is the cause
  • Bonded composite covering exposed root surfaces
  • Dietary modification to reduce acidic foods and drinks
  • Addressing acid reflux with your physician

Understanding Sensitive Teeth

What is actually happening, and why it matters

Tooth sensitivity is one of the most common reasons patients call us, and the cause varies significantly from one case to the next. The mechanism is almost always the same: stimuli (hot, cold, sweet, or acidic) reach the dentin layer of the tooth, which contains microscopic tubules that connect to the nerve. Anything that exposes that dentin (enamel erosion, gum recession, cracks, decay) can cause sensitivity.

The most common cause is exposed dentin from enamel erosion or gum recession. Patients who drink a lot of soda, wine, citrus, or sports drinks slowly dissolve the enamel over years. Patients who brush aggressively wear down both enamel and gum tissue. Patients with gum recession from periodontal disease or aggressive brushing expose the root surface, which has no enamel at all and is naturally more sensitive than the crown of the tooth.

Single-tooth sensitivity is different and often signals a specific problem with that one tooth. A cracked tooth typically becomes sensitive to cold and to biting pressure. A cavity that has reached the dentin causes sensitivity that worsens with sweet foods. A failed filling can cause sensitivity in the tooth it sits in. These cases need targeted treatment, not just sensitive toothpaste.

Recent dental work commonly causes temporary sensitivity that resolves within one to two weeks. Whitening treatment also causes sensitivity for several days after each session because it temporarily makes enamel slightly more permeable. Both of these are normal and not a cause for concern unless they persist beyond the expected window.

At Bonin Dental Care, we approach sensitivity by first identifying the actual cause. Dr. Bonin examines the affected teeth, checks for cracks, decay, recession, and worn restorations, and recommends targeted treatment based on what we find. Many sensitivity cases respond well to a sensitive toothpaste used consistently for several weeks combined with reduced acidic-food exposure. Cases caused by specific tooth problems need targeted dental work to resolve.

When to schedule a visit

Sensitivity in a single tooth, sensitivity that lingers after the stimulus is removed, sensitivity that gets worse week over week, or sensitivity combined with visible damage to the tooth all warrant prompt evaluation. Mild sensitivity that has been stable for months can often wait until your next routine cleaning, but mention it at the appointment.

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How We Help

Services that address Sensitive Teeth

Common Questions

Sensitive Teeth: Common Questions

Does sensitive toothpaste actually work?

Yes, for most generalized sensitivity. Sensitive toothpastes contain potassium nitrate or stannous fluoride that block the dentin tubules and reduce nerve signal transmission. They typically take 2 to 4 weeks of consistent use to reach full effect. Use them as your primary toothpaste, not occasionally. If you stop using them, sensitivity usually returns.

Can sensitivity become a cavity?

Sensitivity itself does not cause cavities, but they often go together. A small cavity can cause sensitivity before it becomes painful. Untreated cavities grow and eventually reach the nerve, which becomes a much bigger problem than sensitivity. If you have new sensitivity in a specific tooth, get it checked rather than assuming it is just generalized sensitivity.

Why are my teeth sensitive after whitening?

Whitening temporarily makes enamel slightly more permeable so the whitening agent can reach the discolored layers. This permeability also lets external stimuli reach the dentin more easily, which causes the sensitivity. It is temporary and typically resolves within 24 to 72 hours of finishing each whitening session. Using sensitive toothpaste during and after whitening reduces this effect significantly.

Should I see a dentist if I have sensitive teeth?

Yes, especially if the sensitivity is new, getting worse, located in a single tooth, or lingering after the stimulus is removed. Generalized sensitivity that has been stable can sometimes be managed with sensitive toothpaste alone, but a dental exam can identify whether there is a treatable underlying cause.

Can grinding cause tooth sensitivity?

Yes. Grinding (bruxism) wears down enamel and exposes the dentin underneath, causing sensitivity. It also creates microscopic cracks in teeth that can cause sensitivity to biting pressure. A custom nightguard addresses the grinding directly and prevents further damage. Sensitivity often improves over months once the grinding stops.

Is sensitivity worse with age?

It can be. Enamel thins slowly over decades, gum recession is more common in older patients, and older restorations may begin to wear or fail. None of these are inevitable, but they are common. Regular cleanings and exams catch problems early before they cause significant sensitivity.

Have a question we did not cover? Reach out to our team.

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100 Windsor River Road
Windsor, CA 95492
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