Sensitive Teeth: Why Does Hot or Cold Make My Teeth Hurt?

Ever taken a sip of hot coffee or enjoyed an ice cream, only to feel a sudden sharp pain in your teeth?

If so, you're not alone. Tooth sensitivity is a common dental concern, and while it can be uncomfortable, it doesn't always mean something serious is wrong.

However, sensitive teeth can sometimes be an early warning sign of an underlying dental problem, so it's worth understanding what might be causing it.

Here's what you need to know about tooth sensitivity, how to manage it, and when to see your dentist.

 

Why Are My Teeth Sensitive to Hot and Cold?

Your teeth have a protective outer layer called enamel. Underneath the enamel is a softer layer called dentine, which contains tiny channels that connect towards the nerve inside your tooth.

When enamel becomes worn or gums recede, the dentine can become exposed.

Hot, cold, sweet or acidic foods and drinks can then stimulate the nerves inside your teeth, causing that familiar sharp, uncomfortable sensation.

This is commonly known as dentine hypersensitivity, or simply sensitive teeth.

 

What Causes Sensitive Teeth?

There are several reasons why your teeth might become sensitive.

1. Brushing Too Hard

You might think brushing harder means cleaner teeth, but using too much pressure can actually damage your gums and contribute to tooth wear over time.

What you can do: Use a soft-bristled toothbrush and gentle brushing movements. You don't need to scrub to remove plaque effectively.

2. Receding Gums

When your gums pull away from your teeth, they can expose the sensitive root surfaces underneath.

Gum recession can happen for several reasons, including gum disease and brushing too aggressively.

What you can do: Keep up your daily brushing and interdental cleaning, and have your gums checked by your dentist or hygienist.

3. Worn Tooth Enamel

Enamel protects the sensitive inner layers of your teeth.

Over time, frequent exposure to acidic foods and drinks, such as fizzy drinks, sports drinks and fruit juices, can gradually wear away enamel. This is called dental erosion.

Unlike other parts of your body, lost tooth enamel doesn't grow back.

What you can do: Limit how often you consume acidic drinks, choose water where possible, and avoid brushing immediately after acidic foods or drinks.

4. Tooth Decay or Cracked Teeth

Sometimes sensitivity isn't simply caused by exposed dentine.

A cavity, cracked tooth or damaged filling can also cause discomfort when eating or drinking.

If the sensitivity is particularly noticeable in one tooth, or you experience pain when biting, it's important to have it examined.

What you can do: Arrange a dental appointment so the cause can be identified and treated if necessary.

5. Grinding Your Teeth

Grinding or clenching your teeth, particularly while sleeping, can contribute to tooth wear and sensitivity.

You might also notice jaw discomfort, headaches or teeth that appear flattened or worn.

What you can do: Talk to your dentist if you suspect you're grinding your teeth. They can assess your teeth and recommend appropriate treatment.

 

How Can I Help Reduce Tooth Sensitivity?

The good news is that there are some simple steps you can take to help manage sensitive teeth.

• Use toothpaste designed for sensitive teeth. These products contain ingredients that can help reduce sensitivity with regular use.
• Brush twice daily with fluoride toothpaste. Fluoride helps protect your teeth against decay and supports the remineralisation of enamel.
• Choose a soft-bristled toothbrush. Gentle brushing is effective without unnecessary pressure.
• Limit acidic foods and drinks. Frequent exposure to acids can contribute to enamel erosion.
• Clean between your teeth daily. Floss or interdental brushes help remove plaque and support healthy gums.
• Keep up with regular dental check-ups. Your dentist can identify early signs of enamel wear, gum recession or other problems.

Remember, sensitive toothpaste can help relieve symptoms, but it won't fix every cause of tooth sensitivity.

 

When Should I See a Dentist About Sensitive Teeth?

Occasional mild sensitivity may not be a major concern, but persistent or worsening sensitivity shouldn't be ignored.

It's worth booking a dental appointment if you notice:

• Sensitivity that keeps coming back or is getting worse
• Pain affecting one particular tooth
• Discomfort when biting or chewing
• Sensitivity that lingers after you've finished eating or drinking
• Visible cracks, chips or changes in your teeth
• Bleeding or receding gums alongside sensitivity

If you develop severe toothache, facial swelling or signs of infection, seek prompt dental care. Swelling accompanied by difficulty breathing or swallowing requires emergency medical attention.

Identifying the cause early can often make treatment simpler and help prevent further damage.

 

Can Sensitive Teeth Be Treated?

Yes. In many cases, tooth sensitivity can be managed or treated successfully.

The right treatment depends on what's causing the problem.

Your dentist may recommend:

• A desensitising toothpaste
• Professional fluoride treatments
• Changes to your brushing technique
• Treatment for gum disease
• A filling or other restoration if a tooth is damaged
• A protective appliance if teeth grinding is contributing to the problem

Not everyone will need dental treatment. Sometimes, a few small changes to your daily oral hygiene routine can make a noticeable difference.

 

Don't Let Sensitive Teeth Take the Enjoyment Out of Eating

You shouldn't have to avoid your favourite foods and drinks because your teeth are sensitive.

Whether it's a hot cup of tea on a cold Christchurch morning or an ice cream on a sunny afternoon, understanding what's causing your discomfort is the first step towards managing it.

At Avonhead Dental, our friendly team can assess your teeth, identify possible causes of sensitivity, and recommend the most appropriate care for your individual needs.

If your teeth have become sensitive or you've noticed a change in how they feel, we're here to help.

Get in touch with Avonhead Dental to arrange a dental check-up and keep your smile healthy and comfortable.