Why Do My Teeth Hurt? A Direct Answer About Tooth Sensitivity
Tooth sensitivity occurs when the protective outer layers of your teeth — the enamel and cementum — wear down or recede, exposing the underlying dentinal tubules that lead directly to your tooth’s nerve. This exposure allows hot, cold, sweet, or acidic stimuli to trigger sharp, sudden pain. The good news is that tooth sensitivity is one of the most treatable dental concerns, and your Calgary dentist has several effective options to relieve it.
What Causes Tooth Sensitivity?
Sensitivity is rarely caused by just one thing. Most patients experience it as a result of several contributing factors building up over time. Understanding the root cause is the first step toward lasting relief.
Enamel Erosion
Your tooth enamel is the hardest substance in the human body, but it isn’t invincible. Frequent consumption of acidic foods and beverages — such as citrus fruits, soft drinks, and vinegar-based foods — gradually erodes enamel, leaving the sensitive dentin layer exposed. Once enamel is lost, it cannot regenerate on its own, which makes early intervention so important.
Gum Recession
Gingival recession (receding gums) is another very common cause. When gum tissue pulls away from the tooth, it exposes the root surface, which has no enamel to protect it. Gum recession can result from periodontal (gum) disease, aggressive brushing, or simply genetics. Patients with recession often notice sensitivity along the gumline rather than on the biting surface of the tooth.
Tooth Grinding (Bruxism)
Many Calgarians grind or clench their teeth — often unconsciously during sleep. This habit, known as bruxism, wears down enamel at an accelerated rate and can also cause micro-fractures in the teeth, both of which significantly increase sensitivity. A custom nightguard is a simple and effective solution your dentist can provide.
Cracked Teeth and Cavities
A cracked tooth or an untreated dental cavity (caries) can expose the inner layers of a tooth, including the pulp where the nerve lives. If you experience sensitivity that lingers for more than a few seconds after a stimulus, or if sensitivity is localised to one specific tooth, a crack or cavity may be the cause — and that warrants a prompt dental visit.
Dental Procedures
It is completely normal to experience temporary sensitivity after professional teeth whitening, a filling, or a crown placement. This type of sensitivity typically resolves on its own within a few days to a few weeks. If it persists longer, your dentist should take another look.
How Can a Calgary Dentist Treat Tooth Sensitivity?
Treatment depends entirely on what is causing the sensitivity in the first place. After a thorough examination, your dentist may recommend one or more of the following approaches:
- Desensitising toothpaste — Contains compounds like potassium nitrate or stannous fluoride that block the dentinal tubules and reduce nerve response over time.
- Fluoride varnish or gel — Applied in-office to strengthen enamel and reduce pain signals from the nerve.
- Dental bonding — A tooth-coloured resin applied to exposed root surfaces to act as a protective barrier.
- Gum grafting — For significant gum recession, a soft tissue graft can cover exposed roots and restore protection.
- Nightguard therapy — A custom-fitted oral appliance to protect teeth from the damage caused by bruxism.
- Root canal treatment — Reserved for severe cases where sensitivity is caused by nerve damage or infection that cannot be resolved through other means.
Can Sensitive Teeth Be Prevented?
Absolutely. Many of the most common causes of sensitivity are preventable with consistent habits. Use a soft-bristled toothbrush and avoid brushing too aggressively. Limit acidic foods and drinks, and rinse your mouth with water after consuming them. Wear a nightguard if you grind your teeth. And perhaps most importantly — attend regular dental check-ups so that small problems are caught before they become painful ones.
Book an Appointment at For Your Smile Dental in Calgary
If tooth sensitivity is affecting your daily life — whether it is your morning coffee, a cold glass of water, or simply breathing in cold Calgary air — you do not have to live with it. At For Your Smile Dental, located at Crowfoot Centre NW in Calgary, Dr. Christine Kim and her team will identify exactly what is causing your sensitivity and create a personalised treatment plan to get you comfortable again. We also offer walk-in appointments for patients who need to be seen quickly. Call us at 587-330-3000 or book your appointment online at fysmiledental.com. Relief is closer than you think.
Frequently Asked Questions
Why are my teeth suddenly sensitive to cold?
Sudden sensitivity to cold is often a sign that your tooth enamel has worn down or your gums have receded, exposing the dentin and the tiny tubules that connect to your tooth's nerve. It can also indicate a cracked tooth or a new cavity. It is best to see a Calgary dentist promptly, as early treatment is much simpler than addressing the problem after it worsens.
Is tooth sensitivity serious, or can I just ignore it?
Tooth sensitivity should never be ignored, even if the pain seems minor. It is almost always a signal that something has changed in your tooth structure — whether that is enamel erosion, gum recession, or a cavity — and most of these conditions will progress if left untreated. A dentist at For Your Smile Dental can determine the cause and recommend the right treatment before the problem becomes more serious or painful.
What is the fastest way to relieve tooth sensitivity?
For immediate short-term relief, using a desensitising toothpaste containing potassium nitrate or stannous fluoride can help reduce sensitivity within a few days to weeks of consistent use. However, for lasting relief, you need to address the underlying cause — which requires a professional dental examination. Your Calgary dentist can apply an in-office fluoride varnish for more immediate results while a longer-term treatment plan is put in place.
Can teeth whitening cause sensitivity, and is it safe?
Yes, tooth sensitivity after teeth whitening is very common and is usually temporary, resolving within a few days. The whitening agents used — typically hydrogen peroxide or carbamide peroxide — can temporarily open the dentinal tubules and irritate the nerve. At For Your Smile Dental in Crowfoot NW, Calgary, we offer professional Zoom teeth whitening with protocols in place to minimise sensitivity and ensure your comfort throughout the process.
Why do my teeth hurt when I bite down but not when I drink something cold?
Pain specifically when biting down — rather than in response to temperature — is often a sign of a cracked tooth, a loose filling, or a developing abscess. This type of sensitivity is different from enamel erosion or gum recession and generally requires prompt attention. We recommend booking an appointment as soon as possible, as cracked teeth and infections can worsen quickly without treatment.
How do I know if my tooth sensitivity is from grinding my teeth?
Signs that bruxism (teeth grinding) may be causing your sensitivity include worn-down or flattened tooth surfaces, jaw soreness or headaches in the morning, and sensitivity that is spread across multiple teeth rather than one specific tooth. Many people grind their teeth during sleep and are completely unaware of it. A dentist can assess the wear patterns on your teeth and fit you for a custom nightguard to protect your enamel going forward.
How much does it cost to treat sensitive teeth in Calgary?
The cost of treating tooth sensitivity in Calgary depends on the underlying cause and the treatment required — it can range from an affordable in-office fluoride treatment to a more involved procedure such as a gum graft or crown. At For Your Smile Dental, we offer 0% financing options to help make dental care accessible for every patient. Call us at 587-330-3000 to discuss your situation, and our team will provide a clear, transparent treatment plan with no surprises.