Why Do My Teeth Feel Sensitive? Causes, Relief & Prevention
Why Do My Teeth Feel Sensitive? Causes, Relief & Prevention
What Is Tooth Sensitivity?
Tooth sensitivity happens when the protective outer layer of your tooth — the enamel — becomes thinner, or when your gums recede and expose the softer layer underneath called dentine. Dentine contains thousands of tiny channels that lead directly to the tooth’s nerve centre. When hot, cold, sweet, or acidic substances reach those channels, it triggers that sharp, fleeting pain we all know too well. It’s not a disease itself — it’s a symptom — and it usually means something is affecting your tooth’s natural protection.
The Most Common Causes
Understanding what’s triggering your sensitivity is the key to fixing it. Here are the main culprits we see every day:
Brushing Too Hard
It seems counter-intuitive, but scrubbing your teeth vigorously actually wears away enamel and pushes your gums back over time. Those tiny channels become exposed, and suddenly every sip of cold water hurts. The fix? A soft-bristled brush and gentle circular motions — firm pressure isn’t needed to clean effectively.
Acidic Foods and Drinks
Fruit juices, fizzy drinks, citrus fruits, wine, and even some herbal teas are highly acidic. Acid softens enamel, making it more vulnerable to wear. If you consume these regularly, over time that enamel gradually thins. A simple tip: wait 30 minutes after eating or drinking something acidic before brushing. Enamel needs that time to re-harden naturally.
Gum Recession and Periodontal Disease
Gums naturally recede slightly as we age, but inflammation and infection speed this up dramatically. As the gum pulls away from the tooth, the root surface — which has no enamel at all — becomes exposed. This type of sensitivity often feels more persistent than temperature-based discomfort. Regular check-ups help us catch gum issues early, before recession becomes significant.
Tooth Grinding (Bruxism)
Many people clench or grind their teeth during sleep, often without realising it. Over months and years, this constant pressure wears down enamel and creates tiny cracks that expose sensitive inner layers. You might wake up with a sore jaw or headache — common signs we look for. A custom-fitted night guard can protect your teeth while you sleep and stop the cycle of wear.
Cracks, Fillings, and Other Triggers
A cracked tooth, an old or failing filling, or even recent dental work can all cause temporary sensitivity. If pain is sharp, constant, or limited to just one tooth rather than several, it’s worth getting it checked — it may be something simple to repair.
Simple Ways to Find Relief at Home
Mild to moderate sensitivity often responds well to changes in your daily routine:
Switch to a desensitising toothpaste — these contain compounds that block those tiny channels from reaching the nerve. Use it consistently for at least two weeks to see the full benefit.
Use a soft-bristled toothbrush — and remember, gentle strokes only.
Rinse with a fluoride or sensitive mouthwash — look for products specifically labelled for sensitive teeth.
Reduce acidic foods — try having them with a meal rather than on an empty stomach, and rinse your mouth with water afterwards.
Don’t brush immediately after acidic food — wait 30 minutes to let enamel re-harden.
When to See Us
Home care helps manage symptoms, but it won’t fix the underlying cause if something more serious is going on. Book an appointment with us if:
– Sensitivity lasts more than 30 seconds after eating or drinking
– You feel constant or throbbing pain
– Sensitivity is in just one specific tooth
– You notice swelling, darkening of a tooth, or pain when biting down
– Over-the-counter toothpaste makes no difference after 2–3 weeks
We’ll examine your teeth and gums, identify exactly what’s causing your sensitivity, and recommend the right solution for you — whether that’s a simple varnish application, filling replacement, gum treatment, or night guard.
You Don’t Have to Live With It
Tooth sensitivity is incredibly common — you’re definitely not alone. But common doesn’t mean normal or something you have to just accept. Small changes to your daily routine can make a huge difference, and we’re always here to help with treatments that provide longer-lasting relief. If sensitive teeth are stopping you from enjoying your favourite foods or drinks, or if you’re simply putting off that check-up — please get in touch. We can help make your smile comfortable again. Book your appointment online or call us today.
