Ever taken a sip of your morning coffee, or a bite of ice cream, and felt a sudden, sharp jolt in your teeth? You’re not alone — tooth sensitivity affects millions of Aussies and can make everyday things like eating and drinking genuinely uncomfortable.
The good news: it’s almost always manageable. Below, we cover what causes sensitive teeth, how to get relief right now, and the treatments that stop it coming back.
What Causes Sensitive Teeth?
Before jumping to solutions, it helps to know what’s behind the pain. The most common causes are:
- Enamel wear and tear. Your enamel is the hard, protective outer layer of your teeth. Acidic foods, aggressive brushing, and teeth grinding (bruxism) wear it down over time, exposing the sensitive layer underneath called dentin. Once enamel is gone, it doesn’t grow back.
- Gum disease and recession. Receding gums expose the roots of your teeth, which have no enamel covering at all. This is a common cause of sharp, sudden sensitivity to hot, cold or sweet foods.
- Tooth decay and cavities. Cavities create small holes that let temperature and certain foods reach the nerve. Left untreated, decay gets worse — and so does the sensitivity.
- Recent dental treatment. Sensitivity after a whitening treatment, filling, or deep clean is normal and usually temporary. If it lingers, it’s worth checking back in with your dentist.
Interested in the link between diet and sensitivity? See our guide on why sugar makes teeth hurt. And if decay is the underlying cause, our breakdown of the stages of tooth decay explains what happens if it’s left untreated.
Why Do My Back Teeth Feel Sensitive?
Sensitivity in your back teeth (molars) often has a slightly different cause to sensitivity at the front of your mouth. The most likely reasons are:
- Cracked or fractured molars — back teeth do most of the chewing work and are more prone to hairline cracks that let temperature and pressure reach the nerve.
- Decay between the teeth — cavities often form in the tight contact points between back teeth, where they’re harder to spot without an X-ray.
- Grinding and clenching — a lot of nighttime grinding wears down molar surfaces first, since they absorb most of the bite force.
- A failing or leaking old filling — older fillings on back teeth can wear at the edges, letting sensitivity in around the margin.
If it’s just one or two back teeth that hurt (rather than your whole mouth), it’s worth getting it checked rather than treating it as general sensitivity. This kind of localised pain can overlap with tooth nerve pain — a cracked tooth or hidden cavity needs a specific fix, not just desensitising toothpaste.
How to Stop Sensitive Teeth Pain Immediately
For quick relief while you sort out the underlying cause:
- Rinse with warm salt water to calm irritation.
- Avoid very hot, cold, sweet or acidic food and drink for a day or two.
- Switch to a soft-bristle toothbrush and ease off on scrubbing.
- Apply a desensitising toothpaste (like Sensodyne or Colgate Sensitive) directly to the sensitive tooth with your fingertip before bed, in addition to brushing with it.
- Over-the-counter pain relief (following the packet directions) can help manage discomfort in the short term.
These steps ease the pain — they don’t fix the cause. If sensitivity is constant, worsening, or feels more like unbearable tooth pain rather than mild sensitivity, book in with your dentist rather than managing it long-term with toothpaste alone.
How to Fix Sensitive Teeth: Professional Treatment Options
Depending on what’s causing your sensitivity, your dentist may recommend:
- Fluoride treatment. A concentrated fluoride gel or varnish applied in-clinic strengthens enamel and reduces sensitivity.
- Fillings or bonding. Covers exposed dentin or treats a cavity that’s causing the pain. For more extensive damage, a dental crown may be recommended instead.
- Gum grafts. If gum recession has exposed the tooth root, a minor procedure can restore gum tissue and protect the area.
- Root canal therapy. In more advanced cases, where decay or damage has reached the nerve, root canal treatment is often the only way to stop the pain for good.
Mild, occasional sensitivity can often be managed at home. If it’s constant, sharp, or affecting one specific tooth, that’s a sign to see your dentist rather than wait it out.
How to Prevent Sensitive Teeth Long-Term
- Brush gently, the right way. Use a soft-bristle brush and gentle circular motions — scrubbing harder doesn’t clean better, it just wears enamel and gums down faster.
- Use fluoride toothpaste. Fluoride helps strengthen and remineralise enamel over time.
- Watch your diet. Cut back on acidic foods and drinks (citrus, soft drink, wine), and rinse with water after having them rather than brushing straight away, which can spread acid across the enamel.
- Don’t skip check-ups. A regular check-up every six months catches enamel erosion, gum recession, and early decay before they turn into pain.
Frequently Asked Questions
What helps sensitive teeth the most?
For most people, a desensitising toothpaste used consistently over 2–3 weeks makes the biggest difference, alongside switching to a soft-bristle brush. For sensitivity that doesn’t improve, a professional fluoride treatment is usually the next step.
Is sensitive teeth treatment permanent?
It depends on the cause. Toothpaste and fluoride manage sensitivity from mild enamel wear, but they won’t fix a cavity, a cracked tooth, or advanced gum recession — those need direct treatment to resolve permanently.
Can sensitive teeth go away on their own?
Mild, temporary sensitivity (after whitening or a filling, for example) often settles on its own within a couple of weeks. Ongoing sensitivity usually has an underlying cause that needs a dentist to fix rather than time.
When should I see a dentist for sensitive teeth?
See a dentist if sensitivity is constant, getting worse, limited to one tooth, or accompanied by visible damage, swelling, or pain when you bite down — these point to a specific problem rather than general sensitivity.
Don’t Ignore the Warning Signs
Tooth sensitivity is more than an annoyance — it’s often a sign something needs attention. Start with the simple fixes above, but don’t wait to see a dentist if the pain persists or is limited to one tooth.
Looking for expert advice? Book an appointment with our experienced dentists at our Springvale or Abbotsford clinic today — or book a same-day appointment if the pain won’t wait.
