What Causes Tooth Sensitivity — and How to Get Relief

Ever felt a sudden zing in your teeth when sipping an icy drink or biting into something sweet? That sharp, fleeting pain is tooth sensitivity — and it’s more common than you might think. While it can seem minor at first, ongoing sensitivity can affect how you eat, drink, and even smile.

In this article, we’ll break down what causes sensitive teeth, how to tell if it’s something more serious, and what you can do — both at home and with your dentist — to get lasting relief.

Table of Contents

1. What Is Tooth Sensitivity?

2. Most Common Causes of Sensitive Teeth

3. Everyday Habits That Can Make Sensitivity Worse

4. When to See a Dentist

5. How to Get Relief: At-Home and Professional Solutions

6. Final Thoughts & Next Steps

What Is Tooth Sensitivity?

Tooth sensitivity (also called dentin hypersensitivity) happens when the protective layer of your teeth — enamel — wears down or your gums recede, exposing the softer inner part of your tooth (called dentin). This area contains tiny tubules that lead directly to your tooth’s nerve, which is why cold, hot, sweet, or acidic foods can suddenly cause discomfort.

Most Common Causes of Sensitive Teeth

Tooth sensitivity can stem from a variety of reasons, including:

1. Brushing Too Hard

Using a hard-bristled toothbrush or applying too much pressure can wear down enamel and irritate gums over time.

2. Gum Recession

As gums pull back (often due to age, brushing technique, or gum disease), they expose the root surface of your tooth — which isn’t protected by enamel.

3. Tooth Decay or Worn Fillings

Cavities or old, damaged fillings can lead to exposed dentin and make a tooth feel sensitive.

4. Cracked or Chipped Teeth

Cracks can allow temperature and bacteria to reach the nerve, triggering pain.

5. Acidic Foods and Drinks

Regular exposure to citrus, soft drinks, and even some sports drinks can erode enamel and make teeth more vulnerable.

6. Teeth Grinding (Bruxism)

Clenching or grinding your teeth — especially at night — can wear down enamel and cause long-term damage.

Everyday Habits That Can Make Sensitivity Worse

• Brushing right after acidic meals (this can push acid deeper into enamel)

• Skipping daily flossing, which can lead to gum inflammation and recession

• Using whitening toothpastes or DIY kits too often

• Not drinking enough water — saliva helps neutralise acid and protect enamel

If you’re wondering about the best toothbrush for sensitive teeth, opt for a soft-bristled one and brush gently in circular motions.

When to See a Dentist

While some sensitivity can be managed at home, you should see a dentist if:

• The sensitivity is sudden or getting worse

• Pain lingers long after eating or drinking

• The sensitive tooth also looks cracked or discoloured

• You have gum swelling or bleeding around the area

At True Smiles Dental, we can check for underlying issues like decay, gum disease, or enamel wear — and recommend solutions that fit your lifestyle.

How to Get Relief: At-Home and Professional Solutions

At-Home Relief

• Desensitising Toothpaste: These block pain signals from the tooth surface to the nerve. Give it a few weeks of consistent use.

• Fluoride Rinses: Strengthen enamel and reduce symptoms over time.

• Avoid Acidic Foods: Or rinse with water after eating them.

• Switch Your Brushing Technique: Use gentle pressure and a soft-bristle brush.

Professional Treatments at True Smiles Dental

• Fluoride varnishes or desensitising gels applied in-clinic

• Dental bonding to cover exposed root surfaces

• Gum grafting in severe gum recession cases

• Custom night guards to protect against grinding

The best approach depends on what’s causing the sensitivity — so a dental exam is the most important first step.

Final Thoughts & Next Steps

Tooth sensitivity is more than a minor annoyance — it’s your body’s way of saying something’s not quite right. With the right care, you can enjoy your favourite foods and drinks again without wincing in pain.

🦷 Still dealing with sensitive teeth? Let the team at True Smiles Dental help you find relief that lasts.