Tooth pain tends to turn up at the worst moment. One minute you’re fine, the next you’re wincing over a cup of tea or chewing on one side. It’s unsettling, partly because the pain is sharp and partly because it’s hard to tell whether it’s something minor or the start of a bigger problem.
Sudden tooth pain is a sign that something needs attention. It doesn’t always mean anything serious, but it’s rarely something to simply wait out.
Why tooth pain comes on so suddenly
The nerve of a tooth sits under a fairly thin layer of enamel and dentine. Once decay, infection or damage reaches it, the pain tends to arrive quickly rather than building up.
That’s why a tooth that felt normal yesterday can hurt a lot today. The cause, whether a crack, a cavity that has reached the nerve, or an abscess forming under the gum, has often been developing quietly for weeks or months.
Common causes
- Decay reaching the nerve. Cavities don’t usually hurt early on. Once decay reaches the nerve, hot, cold or sweet food can set off a sharp or throbbing pain that lingers.
- A cracked tooth. A crack isn’t always visible, but it can expose the sensitive inner layers each time you bite. People often notice a sharp pain as they let go of the bite.
- An abscess. This is a pocket of infection at the root of a tooth or in the gum. You might notice swelling, a bad taste or tenderness when you bite. Because infection can spread beyond the mouth, an abscess needs treatment.
- Gum recession. When gums pull back, from brushing too hard, gum disease or age, the root surface is exposed. Roots don’t have the protective enamel the rest of the tooth has, so they react more to temperature and pressure.
- A lost filling or loose crown. The tooth underneath is suddenly exposed to air, food and temperature, which often causes sharp sensitivity.
What you can safely do while you wait
- Rinse gently with warm salt water to keep the area clean.
- Take an over-the-counter pain reliever as directed on the packet. Don’t put aspirin against the gum: it can burn the tissue.
- Avoid very hot, cold or sugary food and drink.
- Hold a cold compress on the outside of your cheek if there’s swelling.
Beyond that, don’t try to treat the tooth yourself. Home remedies with oils, spirits or pressing things against the tooth won’t fix the cause and can make it harder to diagnose.
When tooth pain becomes urgent
Facial swelling, a fever, difficulty swallowing or opening your mouth, or pain that’s getting quickly worse can mean an infection that needs prompt treatment. A knocked-out tooth, a large crack, or bleeding that won’t stop also need a call to an emergency dentist as soon as you can. If you have trouble breathing or swallowing, go to a hospital emergency department.
What happens at your appointment
The first job is finding the source, because pain can feel as if it’s coming from a different tooth. That usually means an examination, gentle tests of how the tooth responds, and often an X-ray.
Treatment depends on what’s found. A cavity may need a filling, an infected nerve may need root canal treatment, and a cracked tooth may need a crown to protect it. The aim is to relieve the pain and then treat the cause, so it isn’t just masked.
Common questions
Should I wait a few days to see if it goes away? It’s not a good idea. Tooth pain rarely settles for good without treatment, and even if it eases, the cause is still there.
Can grinding cause sudden tooth pain? Yes. Grinding or clenching can cause aching or sensitivity, often in the morning. Mention it to your dentist, who may suggest a night guard.
Why does the pain seem to move between teeth? That’s called referred pain, and it’s common with dental nerves. It’s one reason an examination and X-ray are so useful.
Care near Leppington
Our Prestons clinic on Camden Valley Way sees patients from Leppington and nearby for everything from check-ups to urgent pain. We prioritise dental pain and urgent cases throughout the day. Call the clinic to describe your symptoms, or book online.
This article is general information only and isn’t a substitute for a dental examination. If you have severe pain, swelling or signs of infection, contact a dentist or doctor promptly.