Why Do My Teeth Hurt? Common Causes Of Tooth Pain, & What It Might Mean)
Tooth pain isn’t all the same. Sometimes it’s a sharp twinge when you bite. Other times it’s a dull ache that comes and goes, or a sudden sensitivity to cold drinks. The way a tooth hurts often gives clues about what’s actually causing it, and how urgently it needs attention.
If you’ve been wondering “why do my teeth hurt?”, this guide breaks down the most common causes and what they usually mean.
1. Sensitivity to cold or sweet foods
If your teeth hurt when you drink something cold or eat something sweet, it’s often a sign of tooth sensitivity.
This happens when the outer layer of the tooth (enamel) wears down, or the gums recede slightly, exposing the underlying dentine. Dentine contains tiny channels that connect to the nerve inside the tooth, making it more reactive to temperature and sugar.
Common causes include:
brushing too aggressively
enamel wear over time
early gum recession
What to do:
Switching to a sensitive toothpaste and brushing gently can help. If it persists, it’s worth having it checked to rule out early decay.
2. Sharp pain when biting
A sharp, sudden pain when you bite down is often linked to a cracked tooth or a filling that isn’t sitting quite right.
Cracks in teeth can be very small and not always visible, but they allow pressure to irritate the nerve inside the tooth when you chew.
What to do:
This type of pain is worth checking sooner rather than later. Left untreated, cracks can worsen and lead to more complex treatment.
3. A constant dull ache
A dull, lingering ache can point to inflammation inside the tooth, often related to decay or infection.
This type of pain may:
come and go
feel worse at night
be harder to pinpoint to one tooth
In some cases, it can mean the nerve inside the tooth is becoming irritated or damaged.
What to do:
If the pain doesn’t settle, it’s important to get it assessed. Early treatment is usually simpler than waiting until the pain becomes more severe.
4. Pain when eating or drinking hot foods
Pain triggered by heat can sometimes suggest that the nerve inside the tooth is more seriously affected.
Unlike cold sensitivity (which often disappears quickly), heat-related pain may linger and feel more intense.
What to do:
This is usually a sign that the tooth needs professional assessment, as it may require more involved treatment.
5. Pain around the gums
If your teeth feel sore and your gums look red, swollen or bleed easily, the issue may not be the teeth themselves, but the gum tissue around them.
This is often linked to:
plaque build-up
early gum disease (gingivitis)
What to do:
Improving cleaning along the gumline and between the teeth usually helps. If left untreated, gum problems can progress, so it’s worth addressing early.
6. Pain at the back of the mouth
Pain around the back teeth can sometimes be related to wisdom teeth, especially if they are partially erupted or difficult to clean.
Food and bacteria can become trapped around these areas, leading to inflammation or infection.
What to do:
Keeping the area as clean as possible helps, but persistent discomfort should be checked.
7. Pain after dental treatment
It’s not unusual for teeth to feel sensitive after procedures like fillings or whitening.
This type of discomfort is usually temporary and settles within a few days.
What to do:
If the pain improves gradually, it’s likely part of the normal healing process. If it worsens or doesn’t settle, it’s worth following up.
Why tooth pain shouldn’t be ignored
Tooth pain is your body’s way of telling you something isn’t quite right.
In many cases, the earlier you address the cause, the simpler the treatment. What starts as mild sensitivity can develop into something more involved if left too long.
That doesn’t mean every type of pain is serious, but it does mean it’s worth understanding.
When to get it checked
You should consider getting advice if:
the pain lasts more than a few days
it’s getting worse rather than better
it’s affecting eating or sleeping
you’re unsure what’s causing it
If you’re not sure what’s causing your tooth pain
The challenge with tooth pain is that different problems can feel very similar.
A cavity, a crack, and gum inflammation can all present in overlapping ways, especially early on.
With Nova, you can upload photos of your teeth and describe what you’re feeling, and get a clearer idea of what might be going on and whether it needs attention. It’s completely free, and an early diagnosis could help you avoid complex and costly dental treatment down the line.
