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Why Does My Tooth Hurt When I Eat Ice Cream?

 

Ever wonder why your tooth hurts when it comes into contact with something hot or cold like coffee or ice-cream? This is most likely caused by tooth sensitivity (also called dentin hypersensitivity).

It’s when the inner layer of your tooth (called dentin) becomes exposed. Dentin contains thousands of tiny channels that lead straight to your tooth’s nerve. When something hot, cold, sweet, or acidic makes contact, it travels through those channels and hits the nerve, causing that dreaded sharp, fleeting pain.

Under normal circumstances, dentin is protected by enamel on the crown of your tooth and by cementum near the roots. When either of those wears away or recedes, that’s when the trouble starts.

Recent Trends

So many of us are making really positive changes to the way we eat and live — lemon water in the morning, more fruit, smoothies, salads packed with goodness — and that’s genuinely wonderful. But here’s the thing: even the best wellness advice often leaves out one small but important piece of the puzzle. A lot of these healthy habits — the citrus, the vinegar dressings, the fizzy water — are more acidic than we realise, and over time, that can quietly affect our teeth in ways we don’t always connect the dots on.

Consistently acidic diets are one of the leading contributors to tooth erosion and sensitivity, and dentists are seeing the evidence of this in practices every day.

Whilst nutritionists, fitness experts, and wellness influencers are sharing great advice, they just aren’t always thinking about what’s happening in your mouth at the same time. The advice isn’t wrong — it’s just incomplete – so think of this article as the missing piece because when you have the full picture, you can keep doing all those brilliant things you’re already doing, and protect your smile at the same time.

Tooth sensitivity affects millions of people, often making daily life uncomfortable. The good news is that you’re not alone and once you understand why your teeth hurt, you can do something about it.

Below is a comprehensive guide to help you do just that. And don’t forget, our team at Sonria are on hand to answer any questions you have or to discuss anything that may be of concern.

So, what causes the sensitivity?

Tooth sensitivity rarely happens without a reason. It is often a signal that your enamel is damaged or your gums have pulled back. Here are the most likely reasons:

1. Enamel erosion — As mentioned above, acidic foods and drinks (think citrus, soda, and wine) gradually wear down your enamel over time. Once it’s gone, it doesn’t grow back.
2. Gum recession — When gums pull back, the softer root surface of the tooth becomes exposed. Roots have no enamel, making them especially sensitive.
3. Teeth grinding (bruxism) — Grinding or clenching, especially at night, puts enormous pressure on your teeth and wears down enamel faster than normal use.
4. Brushing too hard — Aggressive brushing with a hard-bristled toothbrush can erode enamel and irritate gums — more pressure doesn’t mean cleaner teeth!
5. Cracked, decayed teeth or old fillings — Cracks and gaps around fillings create pathways that expose the inner tooth to temperature and pressure. A cavity or chipped tooth allows bacteria to enter and irritate the nerve.
6. Dental Procedures – Temporary sensitivity after a dental procedure (like whitening or getting a filling) is totally normal. It usually fades within a few days to a couple of weeks.

Common Triggers to Watch Out For

Not all sensitive teeth react the same way, but here are the most common things that set off that sharp pain:

🧊  Cold drinks & ice cream

☕  Hot coffee & tea

🍋  Acidic foods & citrus

🍬  Sugary sweets

💨  Cold air (breathing in)

🪥  Brushing or flossing

What Can You Do About It?

The great news? There are real, effective solutions — both at home and at your dental clinic.

1. Switch to a sensitivity toothpaste. These contain compounds like potassium nitrate or stannous fluoride that help block those tiny dentinal channels. Use it consistently — results build up over a few weeks. We have listed our top 4 recommendations towards the end of this article.
2. Use a soft-bristled toothbrush. And brush gently in small circular motions rather than aggressive back-and-forth scrubbing.
3. Cut back on acidic foods and drinks. If you do have them, rinse with water afterward — and wait at least 30 to 60 minutes before brushing, since enamel is softer right after acid exposure.
4. Try a Saltwater Rinse: Dissolve 1/2 teaspoon of salt in warm water and rinse to soothe inflammation.

5. Ask your dentist about fluoride treatments. Professional fluoride gels and varnishes can significantly strengthen enamel and reduce sensitivity.
6. If you grind your teeth, get a night guard. A custom-fitted mouthguard can protect your enamel while you sleep.
7. Dental Bonding or Sealants: A tooth-coloured resin is applied to exposed root surfaces to cover the dentin.
8. Gum Grafting: In severe cases of gum recession, a surgical procedure can cover the exposed roots.
9. Root Canal: A last-resort treatment for severe, persistent sensitivity that doesn’t respond to other methods.
10. Don’t procrastinate – book a check up. Sensitivity that lasts for more than a few days, feels sharp and severe, is paired with swelling or toothache, or wakes you up at night, should be checked by a dentist sooner rather than later. These can be signs of something more serious like a cavity or cracked tooth that needs treatment.

Best Toothpastes for Sensitive Teeth

At Sonria we recommend the following toothpastes for managing sensitivity:

• Sensodyne Repair & Protect (Novamin technology builds a protective layer).
• Colgate Sensitive Instant Relief (Can be massaged directly onto the sensitive tooth).
• Oral-B Sensitivity & Gum Calm (Soothes gums during brushing).
• Sensodyne Pronamel (Strengthens and protects enamel against acid erosion).

So remember….

Tooth sensitivity is incredibly common, but it’s not something you just have to live with. Most of the time, a few simple changes to your routine — combined with the right products and regular dental check-ups — can make a huge difference.

It’s important to enjoy life and the saying ‘less is more’ can really help you do that when it comes to avoiding dental problems. For instance, consuming the same amount of sweets, chocolates or fizzy drinks in a shorter time period is better for your teeth than grazing all day on them. You can brush your teeth afterwards to remove the sugar and prevent it turning into acid and rotting your teeth. Using less pressure when you brush your teeth can also help your teeth and gums.

Remember, if your teeth or gums are trying to tell you something, It’s worth listening and taking action. If you want to know more or have any questions or concerns you can contact Sonria through any of our channels (phone, whatsapp, email), or speak to our virtual assistant via the website. Alternatively you can have a chat with one of our dental professionals on your next visit.

Posted on 09 April 2026 by Sonria Dental Clinic