Sensitive teeth Why they hurt and what actually helps
Written with input from the clinical team at Spa Dental Clinic, Droitwich Spa, led by practice owners Dr Nazia Alyas (GDC 103370) and Dr Murtaza Kaderbhai (GDC 103185).
You take a sip of iced water, bite into ice cream or breathe in cold winter air, and a sharp, sudden twinge shoots through your teeth. It’s over in a second or two, but it’s enough to make you chew on one side or avoid cold drinks altogether.
Sensitive teeth are incredibly common. Around one in three adults experiences it at some point. Because it’s so common, many people simply put up with it. But tooth sensitivity is always caused by something, and once you know what that is, it can usually be calmed down or fixed completely.
At Spa Dental Clinic in Droitwich Spa, it’s one of the most common things patients mention at their appointments. This guide explains why it happens, how to tell if it’s “just sensitivity” or something that needs checking, and the treatments that genuinely work.
Why do teeth become sensitive?
Each tooth has a hard outer layer of enamel protecting a softer layer underneath called dentine. Dentine is full of tiny tubes, thousands per square millimetre, that lead to the nerve in the centre of the tooth.
When enamel wears thin or gums pull back, the dentine is exposed. Cold, heat, sweet or acidic things can then travel down those tiny tubes and trigger the nerve. That’s the sharp, short pain most people describe.
So the real question isn’t “why do my teeth hurt?”, but “why has my dentine become exposed?” That’s what decides the right treatment.
Is it sensitivity or something more?
Not every twinge is simple sensitivity. The type of pain says a lot about the cause. Use this as a guide, not a diagnosis.
|
What you feel |
Likely cause |
How soon to be seen |
|---|---|---|
|
A sharp twinge with cold, sweet or air that stops within seconds, often affecting several teeth |
Exposed dentine from enamel wear or gum recession |
At your next check-up, or sooner if it’s getting worse |
|
Sensitivity in one tooth only, especially when biting |
A crack, decay or a leaking filling |
Within a week or two |
|
Pain that lingers for more than a few seconds after hot or cold |
An inflamed nerve |
Within a few days |
|
Throbbing pain that comes on by itself or keeps you awake |
Possible infection |
As soon as possible |
|
Sensitivity after whitening or a recent filling |
A temporary reaction |
Usually settles in days; see us if it doesn’t |
|
Sensitivity with bleeding or puffy gums |
Gum inflammation or gum disease |
Within a few weeks |
If the pain is severe, lasts a long time or comes with swelling, our emergency dental care page explains what to do and how to get seen quickly.
The most common causes of sensitive teeth
Brushing too hard
Scrubbing with a hard toothbrush, or brushing side to side with lots of pressure, wears away enamel near the gumline and can push the gums back. It’s one of the most common causes we see, often in people who take great care of their teeth. A soft brush and a gentle technique protect both your enamel and your gums.
Gum recession
When gums pull back, they expose the root surface of the tooth. Roots aren’t covered by enamel, so they’re naturally more sensitive. Recession can be caused by brushing too hard, gum disease, grinding, or simply age and genetics.
Acid wear
Fizzy drinks, fruit juice, wine, citrus fruit and sports drinks soften enamel. Over time, this thins it and exposes the dentine. Frequent snacking on acidic foods, sipping drinks slowly throughout the day and acid reflux all make it worse.
Grinding and clenching
Night-time grinding wears down the biting surfaces of teeth and can cause tiny cracks. Teeth that grind often feel sensitive or achy, especially in the morning. If your bite feels uneven, our guide to occlusion in dentistry explains how the way your teeth meet affects wear.
Decay, cracks and old fillings
A cavity, a cracked tooth or a filling with a gap around its edge can all cause sensitivity, usually in one specific tooth. These need treating by a dentist, as sensitive toothpaste won’t fix them.
After dental treatment
It’s common to have some sensitivity after a new filling, a professional clean or teeth whitening. This usually settles within a few days to a couple of weeks. Our article on why a tooth hurts after a filling explains what’s normal and what isn’t.
Gum disease
Inflamed gums and the build-up of tartar can contribute to sensitivity, and gum disease can lead to recession over time. A professional clean with a dental hygienist removes tartar and helps gums heal.
Sensitive teeth treatment: what works
The right sensitive teeth treatment depends on the cause. In many cases, a combination of approaches works best.
Sensitive toothpaste, used properly
Toothpastes for sensitive teeth work either by calming the nerve or by blocking the tiny tubes in the dentine. They do work, but they take time, usually two to four weeks of daily use.
To get the most from them:
- Brush twice a day for two minutes
- Spit, don’t rinse, so the active ingredients stay on your teeth
- Rub a small amount onto the sensitive area with a clean finger before bed
- Stick with it, as the effect builds up gradually
Professional desensitising treatments
If toothpaste alone isn’t enough, your dentist or hygienist can apply a high-strength fluoride varnish or a desensitising treatment directly to the sensitive areas. These seal the exposed dentine and often give quicker relief.
Covering exposed areas
Where enamel has worn away or the gum has receded, the exposed area can sometimes be covered with tooth-coloured filling material. This protects the dentine and can also improve the look of worn teeth. For more extensive wear, composite bonding can rebuild the shape of the teeth.
Treating the underlying problem
If the cause is decay, a crack or a leaking filling, that needs repairing. If grinding is to blame, a custom night guard protects your teeth while you sleep. If gum disease is involved, a course of hygiene treatment comes first.
In rare cases where the nerve is badly inflamed and nothing else helps, root canal treatment may be recommended. This is a last resort, not a first step.
Quick comparison
|
Treatment |
Best for |
How quickly it helps |
|---|---|---|
|
Sensitive toothpaste |
Mild, general sensitivity |
Two to four weeks |
|
Fluoride varnish or desensitiser |
Sensitivity that toothpaste hasn’t fixed |
Often within days |
|
Covering exposed areas |
Worn enamel or exposed roots |
Straight away |
|
Night guard |
Grinding-related sensitivity |
Gradually, as wear stops |
|
Hygiene treatment |
Sensitivity linked to gum problems |
Over a few weeks as gums heal |
|
Fillings or other repairs |
Decay, cracks, failed fillings |
Usually straight away |
How your hygienist can help
A visit to the hygienist isn’t just about cleaning. For people with sensitive teeth, it can make a real difference.
Your hygienist can:
- Spot early gum recession and enamel wear before they get worse
- Show you a gentler brushing technique that protects your gums
- Recommend the right toothbrush, toothpaste and interdental brushes for you
- Apply fluoride or desensitising treatments to sensitive areas
- Keep gum disease under control so it doesn’t lead to further recession
If you’ve ever found a clean uncomfortable because of sensitivity, mention it before you start. Your hygienist can adapt the clean and use products to keep you comfortable. Cleaning between your teeth properly also helps keep gums healthy, and our interdental cleaning guide shows you how.
Everyday habits that protect sensitive teeth
- Use a soft or sensitive toothbrush, and let an electric brush do the work rather than pressing hard
- Brush gently in small circles at the gumline, not side to side
- Wait at least 30 minutes after acidic food or drink before brushing
- Drink acidic drinks with meals, not sipped throughout the day, and use a straw for fizzy drinks and juice
- Rinse with water after acidic food or drink
- Don’t use whitening toothpastes every day if your teeth are sensitive, as some are more abrasive
- Ask about a night guard if you grind your teeth
When to see a dentist about tooth sensitivity
Book a dental check-up if:
- Sensitivity hasn’t improved after four weeks of using sensitive toothpaste
- It’s only in one tooth
- It’s getting worse or spreading
- It hurts when you bite
- The pain lingers after the trigger has gone
- Your gums are bleeding, receding or swollen
At a check-up, your dentist will find the cause, which might mean a quick examination, an X-ray or testing individual teeth. Once the cause is clear, they’ll explain your options and the cost before any treatment starts.
Pain that’s severe, throbbing or comes with swelling shouldn’t wait for a routine appointment.
Why patients choose Spa Dental Clinic
At Spa Dental Clinic in Droitwich, our team is led by Dr Murtaza Kaderbhai and Dr Nazia Alyas. We offer a range of denture options, along with implants and other restorative treatments. That means we can recommend what is right for you, rather than steering you towards the one thing we offer.
Disclaimer
The information in this article is intended for general educational guidance only and does not constitute personalised dental advice. For persistent bad breath that does not respond to improved home care, please book an appointment with a qualified dental professional for a proper clinical assessment.
Spa Dental Clinic is a private dental practice at 47 Blackfriars Ave, Droitwich WR9 8RT, Worcestershire’s number one Diamond Invisalign Provider, led by Dr Murtaza Kaderbhai GDC: 103185 and Dr Nazia Alyas GDC: 103370. We offer dental hygienist appointments, dental check-ups, Invisalign, composite bonding, porcelain veneers, teeth whitening, dental crowns, dental implants, smile makeovers and emergency appointments.
