Tooth Sensitivity (Hot/Cold Pain)
Causes, Symptoms & Treatment
Tooth sensitivity is a common dental concern that causes discomfort when consuming hot or cold foods and drinks. It may affect one tooth or multiple teeth, producing a sensation that can be sharp and short-lived or more persistent. Sensitivity may develop gradually or appear suddenly. A professional dental assessment is important to identify the cause and determine appropriate management.
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Understanding the Concern
What Is Tooth Sensitivity?
Tooth sensitivity occurs when the inner layer of the tooth — the dentine — becomes exposed. Dentine contains thousands of microscopic tubules that lead to the nerve of the tooth. When these are uncovered or compromised, stimuli from the outside can reach the nerve and cause discomfort.
External stimuli such as temperature changes — particularly cold drinks, ice, hot beverages or cold air — are the most common triggers. Sweet, acidic foods or pressure from brushing can also provoke the characteristic sharp, fleeting sensation.
Sensitivity may be temporary or ongoing depending on the cause. Short-lived sensitivity after a procedure or whitening often settles on its own, while sensitivity driven by wear, recession or dental disease usually persists unless the underlying cause is addressed.
It can affect enamel or gum-related areas. Some patients notice sensitivity at the biting surface of a tooth, while others feel it most strongly at the gum line, where the root may be exposed. Clinical evaluation helps determine the underlying factors and guide appropriate management.
Symptoms & Signs
Sharp pain with hot or cold
A sudden, brief jolt of pain when eating ice cream, drinking hot beverages or breathing in cold air — often the most recognisable feature of tooth sensitivity.
Sensitivity to sweet or acidic foods
Discomfort when eating sugary or acidic foods such as sweets, citrus fruits, vinegar-based dressings or fruit juices can accompany temperature sensitivity.
Discomfort when brushing teeth
A flinch or sharp twinge when the toothbrush touches a particular tooth or area — sometimes linked to gum recession, enamel wear or overzealous brushing.
Pain that comes and goes
Sensitivity that appears intermittently — triggered by specific foods, drinks or conditions — rather than being constant. Pattern and triggers help with diagnosis.
Localised or generalised sensitivity
Sensitivity affecting a single tooth may suggest a specific local issue such as decay, a crack or recession, while generalised sensitivity across many teeth may point to enamel wear or other factors.
Pain that lingers after the trigger
Discomfort that continues for more than a few seconds after removing the hot or cold trigger may indicate a deeper issue — including inflammation of the pulp — and warrants prompt assessment.
Symptoms vary depending on cause. Persistent, lingering or severe sensitivity warrants prompt dental assessment.
Contributing Factors
Common Causes of Tooth Sensitivity
Sensitivity is often multifactorial, with several contributing causes that may combine. Identifying the responsible factors is an important part of tailored treatment.
Enamel wear
Aggressive brushing, abrasive toothpastes and frequent consumption of acidic foods and drinks can gradually wear the enamel thin, exposing the softer dentine beneath and increasing the likelihood of sensitivity.
Gum recession
When gums recede, the root surface — which is not protected by enamel — becomes exposed. Root dentine contains microscopic tubules that can transmit temperature changes directly to the tooth's nerve, causing sharp sensitivity.
Tooth decay or cavities
Decay can breach the protective enamel and reach the dentine, producing sensitivity to hot, cold or sweet stimuli. Pain that lingers or intensifies over time may indicate more advanced decay requiring prompt treatment.
Cracked or damaged teeth
Cracks, chips or broken restorations can expose inner tooth structures to temperature changes. A sharp pain on biting combined with temperature sensitivity may suggest a cracked tooth that warrants assessment.
Teeth grinding or clenching (bruxism)
Repeated stress from grinding or clenching wears enamel, can cause microscopic cracks and may contribute to gum recession — all of which increase the likelihood of temperature sensitivity over time.
Recent dental treatment
Sensitivity sometimes follows fillings, crown preparation, deep cleaning or professional whitening. This type of sensitivity is usually temporary, but should be mentioned to your dentist if it persists beyond a few weeks.
Why It Matters
Potential Risks if Not Addressed
Unaddressed sensitivity can cause ongoing discomfort that affects eating and drinking — leading some patients to avoid hot or cold foods altogether, or to chew on one side of the mouth. Over time this can affect nutrition, social enjoyment of meals and overall quality of life.
Where sensitivity is driven by enamel wear or gum recession, these processes may continue to progress if contributing factors (such as aggressive brushing, dietary acid or grinding) remain unchanged. Early identification allows protective measures to be put in place sooner rather than later.
Sensitivity can also be associated with an increased risk of tooth decay, particularly where root surfaces have become exposed. Root dentine is softer than enamel and more susceptible to decay, making professional cleaning and preventive care especially important.
Perhaps most importantly, sensitivity can mask underlying dental issues that continue to progress in the background — including decay, cracks or inflammation of the pulp. Assessment ensures any such issues are identified early and managed appropriately, helping protect long-term oral health.
Your Options
Treatment Options for Tooth Sensitivity
Treatment depends on clinical assessment. Management varies based on diagnosis, and a personalised treatment plan is recommended following examination.
Desensitising Treatments
Professional desensitising products applied to sensitive areas, combined with home desensitising toothpaste, can help calm symptoms where the cause is mild dentine exposure.
Learn MoreFluoride Applications
In-surgery fluoride varnish helps strengthen enamel and reduce sensitivity, particularly around exposed root surfaces or early areas of wear.
Learn MoreTreatment of Gum Recession
Where gum recession is contributing to sensitivity, hygiene therapy and tailored brushing advice — or in selected cases, referral for gum treatment — can help protect root surfaces.
Learn MoreFillings for Decay
Where decay is identified as the cause, a tooth-coloured filling can remove affected tissue and seal the tooth to restore comfort and function.
Learn MoreProtective Restorations
Composite bonding or, in more extensive cases, crowns may be recommended to protect worn, cracked or significantly compromised teeth from further sensitivity.
Learn MoreRoot Canal Treatment
Where the tooth's nerve has become inflamed or infected — producing persistent, lingering sensitivity — root canal treatment may be considered to preserve the tooth.
Learn MoreYour First Step
Importance of Professional Dental Assessment
Sensitivity can indicate different underlying conditions — from simple enamel wear to gum recession, decay, cracked teeth or inflammation of the pulp. Because the implications of each are quite different, professional evaluation is important before assuming a cause.
Examination helps identify the cause. A careful check of the teeth, gums, bite and patterns of wear, combined with specific tests such as cold sensitivity testing or bite testing, helps pinpoint which tooth and which tissue is producing the symptoms.
X-rays may be used where appropriate to assess areas that cannot be seen directly — including decay between teeth, the bone around the roots and the condition of the pulp. Imaging is only taken when clinically justified.
Treatment planning is tailored to individual needs, with a clear explanation of what is driving the sensitivity and the realistic benefits of each option. Early assessment may help prevent progression — especially where sensitivity is an early warning of a developing issue.
What to Expect
- 1Discussion of your symptoms — when sensitivity began, which teeth are affected, specific triggers and whether pain lingers after the trigger is removed
- 2Review of your medical, dental and lifestyle history — including diet, brushing technique, any grinding or clenching habits and recent dental treatment
- 3Clinical examination of teeth and gums — assessing enamel wear, gum recession, visible decay, restorations and any cracks or chips
- 4Specific tests where relevant — including cold sensitivity testing, bite testing or percussion to help identify the tooth and tissue responsible
- 5X-rays where clinically justified — to assess areas between teeth, the root and the supporting bone, ensuring no underlying issue is missed
- 6Personalised treatment plan — outlining the likely cause, what can be managed conservatively and which options may be considered for lasting improvement
Two Convenient Locations
Visit Us in Central London
Assessment and treatment planning for tooth sensitivity and other dental concerns are available at our London clinic, where professional evaluation can help determine appropriate care options.
South Kensington
Now Open20 Old Brompton Road, South Kensington, London SW7 3DL
Mon & Wed: 9 am – 6 pm
Tue & Thu: 9 am – 8 pm
Fri: 9 am – 5 pm
Sat & Sun: 10 am – 4 pm
1 min from South Kensington tube (District, Circle & Piccadilly)
City of London
Opening May 20265 Ave Maria Lane, City of London, London EC4M 7AQ
Mon – Fri: 8 am – 8 pm
Sat & Sun: Closed
3 min from St Paul's tube (Central line) · 5 min from Blackfriars
Common Questions
Tooth Sensitivity FAQ
Your Dental Team
Experienced Dentists
All our clinicians are GDC registered. Our dental team is experienced in diagnosing and managing tooth sensitivity with a calm, thorough and individualised approach.
Dr. Yasha Y Shirazi
Principal Dentist & Clinical Director
GDC: 195843
Dr. Reza Davari
Dentist
GDC: 302422
Dr. Kamran Yazdi
Dentist
GDC: 197926
Dr. Andreia Phipps
Dentist
GDC: 229601
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Our South Kensington clinic is regulated by the Care Quality Commission (CQC) and all our clinicians are registered with the General Dental Council (GDC).
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Assessment for Tooth Sensitivity
Experiencing Hot or Cold Tooth Pain?
If you experience sensitivity to hot or cold, a professional dental assessment can help identify the cause and determine appropriate treatment options based on your individual needs.
