What is tooth sensitivity?

Tooth sensitivity occurs when the inner layer of your tooth, called dentine, becomes exposed.

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Dentine contains tiny channels that lead directly to the nerve.

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When exposed, everyday triggers like cold air, hot drinks or sweet foods can cause sharp, sudden pain.

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Sensitivity is extremely common and often linked to enamel wear, gum recession or underlying dental issues.

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Most common causes of tooth sensitivity

1. Enamel erosion

Acidic foods, fizzy drinks and aggressive brushing can wear away enamel, exposing dentine.

2. Gum recession

Gums pull back from the tooth, exposing the root surface — which has no enamel protection.

3. Tooth decay

Cavities can reach deeper layers of the tooth, causing sensitivity and pain.

4. Cracked or chipped teeth

Cracks allow temperature changes to reach the nerve more easily.

5. Teeth grinding (bruxism)

Grinding wears down enamel and can expose dentine.

6. Whitening treatments

Temporary sensitivity is common during whitening due to gel penetration.

7. Worn fillings or dental work

Old fillings can leak or expose sensitive areas.

8. Gum disease

Inflamed gums can expose roots and increase sensitivity.

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Why sensitivity happens

Why your teeth feel more sensitive in cold weather

Cold air can cause sudden nerve stimulation, especially if enamel is thin or gums have receded.Many people notice sensitivity more in winter due to:

• cold winds
• rapid temperature changes
• dry indoor heating
• increased hot drink consumption

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If cold air triggers pain, it’s often a sign of exposed dentine or gum recession.

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How to reduce tooth sensitivity

1. Use a sensitive toothpaste

Helps block dentine channels over time.

2. Brush gently with a soft‑bristled brush

The Toothfairy Wand’s Reflex Tech bristles reduce irritation.

3. Avoid acidic foods and drinks

Fizzy drinks, citrus and vinegar can weaken enamel.

4. Drink through a straw

Reduces contact with acidic or cold drinks.

5. Use fluoride mouthwash

Strengthens enamel and reduces sensitivity.

6. Avoid aggressive brushing

Scrubbing can worsen enamel wear and gum recession.

7. Treat grinding

Night guards help protect enamel from bruxism.

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When sensitivity means you need a dentist

Seek professional advice if you experience:

• sensitivity lasting more than 1–2 weeks
• pain when biting
• swelling or bleeding
• sensitivity only in one tooth
• sudden sharp pain
• sensitivity after dental work that doesn’t improve

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These may indicate decay, cracks, infection or gum disease.

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How Toothfairy supports sensitive teeth

Photo‑based assessments

Upload images to check whether sensitivity is caused by enamel wear, gum recession or decay.

Dentist‑led guidance

Clear advice on whether you need treatment or can manage symptoms at home.

Smart brushing support

The Toothfairy Wand helps maintain gum health and reduce irritation.

Clear next steps

Know whether you need a clinic visit or can continue with home care.