Sensitive teeth can often be treated by identifying the underlying cause and using the right dental treatment or home care. Common causes include worn enamel, receding gums, tooth decay, cracked teeth, teeth grinding and gum disease. Depending on the cause, treatment may range from desensitising toothpaste to fillings, root canal treatment or gum graft surgery.

If your teeth hurt when eating hot, cold, sweet or acidic foods, it is important not to ignore the symptoms. Tooth sensitivity may be a minor problem, but it can also be an early sign of a dental condition that requires professional treatment.

What Are Sensitive Teeth?

Sensitive teeth are teeth that feel pain or discomfort when exposed to certain temperatures, foods or drinks. The pain usually occurs when the protective enamel or gum tissue has been damaged, exposing the inner layer of the tooth called dentine.

Dentine contains tiny microscopic tubes that connect directly to the nerve inside the tooth. When these tubes become exposed, heat, cold and other stimuli can trigger a sharp, short-lasting pain.

Common symptoms of tooth sensitivity include:

Sharp pain when drinking hot or cold beverages
Pain when eating ice cream or cold foods
Sensitivity to sweet or acidic foods
Discomfort while brushing or flossing
Pain when breathing in cold air
Sensitivity affecting one tooth or several teeth

Some people experience occasional sensitivity, while others notice discomfort every day.

What Causes Sensitive Teeth?

Sensitive teeth are caused when the protective layers of the tooth become damaged or worn away, exposing the dentine underneath. There are several possible causes, and more than one may be contributing to your symptoms.

Worn Tooth Enamel

Worn enamel is the most common cause of tooth sensitivity.

Enamel protects the outer surface of your teeth. Over time, brushing too hard, acidic foods and drinks, teeth grinding or normal wear can gradually thin the enamel, allowing external stimuli to reach the dentine.

Once enamel is lost, it does not naturally grow back.

Receding Gums

Receding gums expose the tooth roots, which are naturally more sensitive than the enamel-covered parts of the tooth.

Unlike the crown, the root is protected by cementum, which is much thinner than enamel. When the gums recede, the root becomes vulnerable to temperature changes and everyday foods.

Gum disease and aggressive brushing are common causes of gum recession.

Tooth Decay

Tooth decay can expose the deeper layers of the tooth and cause sensitivity.

As cavities become larger, bacteria move closer to the nerve, making the tooth increasingly sensitive. Without treatment, decay may eventually cause severe toothache or infection.

Cracked or Chipped Teeth

Cracked or chipped teeth allow temperature changes and bacteria to reach the inner layers.

Even small cracks may cause discomfort when chewing or drinking cold liquids. In some cases, the crack may not be visible without a dental examination.

Teeth Grinding

Teeth grinding gradually wears away enamel and places excessive pressure on the teeth.

Over time, this can increase tooth sensitivity and lead to fractures or worn biting surfaces.

Many people grind their teeth while sleeping without realising it.

Gum Disease

Gum disease contributes to tooth sensitivity by causing the gums to pull away from the teeth.

As the roots become exposed, sensitivity often develops alongside bleeding gums, swelling and bad breath.

Treating gum disease can often reduce sensitivity and prevent further damage.

Acidic Foods and Drinks

Acidic foods and drinks can gradually erode tooth enamel.

Common examples include:

Soft drinks
Sports drinks
Citrus fruits
Wine
Vinegar-based foods

Frequent exposure to acid increases the risk of enamel erosion and tooth sensitivity.

Recent Dental Treatment

Some dental treatments can cause temporary sensitivity.

Teeth whitening, fillings, crowns and professional cleaning may leave teeth feeling sensitive for a few days. In most cases, the discomfort improves naturally as the tooth settles.

How Can Sensitive Teeth Be Fixed?

Sensitive teeth can often be fixed by treating the underlying cause. Visit a dentist near you and have your teeth examined to determine why the sensitivity has developed, then recommend the most appropriate treatment.

Desensitising Toothpaste

Desensitising toothpaste helps reduce sensitivity by blocking the microscopic pathways leading to the tooth nerve.

Most people notice improvement after using the toothpaste consistently for several weeks.

Your dentist may recommend continuing its use even after symptoms improve.

Fluoride Treatment

Professional fluoride treatments strengthen enamel and reduce tooth sensitivity.

A concentrated fluoride varnish or gel is applied directly to the affected teeth to help protect exposed dentine and reduce discomfort.

Dental Fillings

Dental fillings repair cavities and exposed areas that may be causing sensitivity.

If tooth decay or worn tooth surfaces are responsible, restoring the tooth with a filling often removes the sensitivity while preventing further damage.

Dental Bonding

Dental bonding covers exposed root surfaces or worn enamel using a tooth-coloured resin.

The material acts as a protective barrier, reducing sensitivity while improving the appearance of the tooth.

Treating Gum Disease

Treating gum disease removes the infection that may be causing gum recession and exposed roots.

Treatment may include:

Professional dental cleaning
Scaling and root planing
Improved oral hygiene
Regular maintenance appointments

Early treatment usually produces the best long-term results.

Night Guard for Teeth Grinding

A custom-made night guard protects your teeth if grinding is contributing to sensitivity.

The appliance reduces excessive pressure and helps prevent further enamel wear while you sleep.

Gum Graft Surgery

Gum graft surgery treats sensitivity caused by exposed tooth roots.

Healthy gum tissue is placed over the exposed root to improve protection, reduce sensitivity and help prevent further gum recession.

This treatment is usually recommended for more advanced cases.

Root Canal Treatment

Root canal treatment may be necessary if the tooth nerve has become infected or severely inflamed.

The procedure removes the damaged nerve tissue, relieves pain and allows the tooth to be preserved rather than extracted.

Can Sensitive Teeth Be Prevented?

Sensitive teeth can often be prevented by protecting your enamel and maintaining healthy gums.

Simple habits that help reduce your risk include:

Brush gently using a soft-bristled toothbrush.
Use fluoride toothpaste every day.
Limit acidic foods and drinks.
Avoid brushing immediately after consuming acidic beverages.
Floss daily.
Wear a night guard if you grind your teeth.
Attend regular dental check-ups and professional cleans.

Preventing enamel wear and gum disease is the best way to reduce the risk of future sensitivity.

When Should You See a Dentist?

You should see a dentist if your tooth sensitivity lasts for more than a few days or continues to return.

Arrange a dental examination if you experience:

Sudden tooth sensitivity
Severe pain when eating or drinking
Sensitivity affecting only one tooth
Pain when biting
Swollen gums
Bleeding gums
A chipped or cracked tooth

Persistent sensitivity should always be investigated because it may indicate tooth decay, gum disease or another dental problem that requires treatment.

Can Sensitive Teeth Go Away on Their Own?

Sensitive teeth may improve on their own if the cause is temporary, such as after teeth whitening or a professional dental cleaning. However, sensitivity caused by enamel loss, gum recession or tooth decay usually requires treatment.

Ignoring ongoing sensitivity allows the underlying problem to worsen, which may result in more complex and expensive treatment later.

Final Thoughts

Sensitive teeth are a common dental problem that can make everyday eating and drinking uncomfortable. Worn enamel, receding gums, tooth decay, gum disease and teeth grinding are among the most common causes.

The good news is that most cases of tooth sensitivity can be treated successfully once the underlying cause has been identified. Whether you need desensitising toothpaste, fluoride treatment, a filling or more advanced dental care, early treatment can protect your teeth and improve your comfort.

If your teeth are becoming increasingly sensitive, book a dental examination to identify the cause and receive the most appropriate treatment before the problem becomes more serious.

Author

Dr. Sharmila Wazir

I’m a passionate local who’s been serving the Beecroft community for serveral years.

My mission is to bring the brightest smile in your face. I believe in catching problems early on to keep your smile healthy for years to come. That’s why I focus on early intervention and minimally invasive treatments whenever possible.

But dentistry is more than just fixing teeth; it’s about creating a positive experience. I love listening to your needs and concerns, providing a comprehensive diagnosis, and crafting the most comfortable treatment plan possible.

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