Teeth · Perivale, Ealing

Sensitive Teeth. What’s causing it, and what brings relief.

That sharp twinge from cold, hot or sweet food happens when the softer layer under the enamel is exposed. It’s common and usually manageable, but sensitivity that comes on suddenly or affects one tooth should be checked.

What’s going on

Why teeth become sensitive.

Under the enamel is a softer layer called dentine. If enamel wears away, or gums shrink back, the dentine is exposed and heat, cold or sweetness can reach the nerve.

The result can be a quick, sharp pain or a longer ache. Finding the cause matters, because the same twinge can come from worn enamel, a receding gum, decay or a cracked tooth, and each is treated differently.

Source: Oral Health Foundation: Sensitive teeth (opens in a new tab), Oral Health Foundation: Dental erosion (opens in a new tab).

Common causes

  • Brushing too hardA hard toothbrush or heavy pressure can wear enamel and push gums back.
  • Acid wear (erosion)Fizzy drinks, fruit juice, citrus fruit and stomach acid soften enamel.
  • Gum recession and gum diseaseWhen gums shrink back, the root surface is left exposed.
  • Cracks and whiteningA cracked tooth, or tooth whitening, which usually causes temporary sensitivity.

At home

What helps, and what to avoid.

Do

  • Use a toothpaste for sensitive teeth every day: they only keep working while you keep using them
  • At night, rub a little onto the sensitive area and leave it on
  • Use a soft brush with gentle pressure
  • Keep acidic food and drinks to mealtimes, and use a straw for fizzy drinks
  • Wait at least an hour after acidic food or drink before brushing

Avoid

  • Don’t scrub side to side with a hard brush
  • Don’t brush straight after fruit juice, fizzy drinks or citrus fruit
  • Don’t ignore sensitivity in one tooth that’s getting worse

Based on Oral Health Foundation: Sensitive teeth (opens in a new tab), Oral Health Foundation: Dental erosion (opens in a new tab).

At your appointment

What I check when teeth are sensitive.

  1. Which teeth, and when

    Cold, sweet or biting? One tooth or many? The pattern often points straight to the cause.

  2. Exposed root surfaces

    Receding gums leave the root exposed. I check how far, and whether gum disease is involved.

  3. Signs of wear

    Acid erosion and heavy brushing leave tell-tale wear. We’ll talk about what’s causing it and how to slow it.

  4. Decay or a crack

    Sensitivity in one tooth can mean decay or a crack, which needs a different treatment from general sensitivity.

How I can help

Treatments for sensitive teeth.

Sensitive Teeth FAQs

Questions about sensitive teeth.

Something else on your mind? Email me or call 020 8997 0933.

What is the best toothpaste for sensitive teeth?

Look for a toothpaste for sensitive teeth containing potassium nitrate, potassium citrate or stannous fluoride. Use it every day, because the effect wears off if you stop.

Why are my teeth suddenly sensitive?

Sudden sensitivity, especially in one tooth, can be a sign of decay, a cracked tooth, gum problems or infection, so it’s worth having it checked.

Can sensitive teeth be fixed?

Often, yes. A sensitive toothpaste helps many people. A dental professional can also apply a desensitising treatment, recommend a high-fluoride toothpaste or cover worn areas.

Does tooth whitening cause sensitivity?

Whitening usually causes temporary sensitivity, which settles after treatment.

Should I brush less if my teeth are sensitive?

No. Keep brushing twice a day, but use a soft brush, gentle pressure and a toothpaste for sensitive teeth.

Marisa Lennie, Dental Hygienist & Therapist

Written & clinically reviewed by

Marisa Lennie

Dental Hygienist & Therapist · Dip DHDT (RCS England) · GDC 252605

Last reviewed

Marisa qualified through the Royal College of Surgeons of England, training clinically at King’s College Hospital, London, and is an Approved Education Supervisor for trainee hygienists & therapists. She assesses and treats sensitive teeth at Bilton Road Dental Practice in Perivale.

Sources & guidance

  1. Oral Health Foundation: Sensitive teeth Updated June 2026
  2. Oral Health Foundation: Dental erosion Updated October 2026
  3. General Dental Council: Direct access

This page is general information about sensitive teeth. It isn’t a diagnosis. Sudden, severe or one-sided sensitivity should be examined.

Find out what’s behind the twinge.

Call the practice or send an email to book your appointment. No referral needed.

Bilton Road Dental Practice · 56 Bilton Rd, Perivale, Greenford, London, UB6 7DH

Sensitive teeth checks in Perivale (UB6), Ealing, for patients from Greenford, Alperton, Sudbury, Hanwell and Northolt.

Please note

Before you continue

This website is currently under construction. While we try to keep everything accurate and up to date, some content, treatment details or information may be incomplete or out of date. Please contact the practice directly to confirm anything important before making decisions about your care.

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