Tooth Pain Under a Crown: What It Means and What to Do

You had a crown fitted. Maybe last month, maybe ten years ago. Now the tooth under it aches and you’re not sure why. Short version: a settled crown shouldn’t hurt. A bit of soreness in the first week or two after it goes on is normal and fades. But pain that turns up later, or won’t quit, is the tooth flagging something. A crown’s just a cap. It doesn’t kill the nerve, and it doesn’t seal the tooth off from decay for good. So the stuff underneath can still play up.

Most of it’s fixable, often fast. Here’s what the pain usually means.

Should a crowned tooth hurt at all?

Once it’s settled? No. A new crown can feel sensitive for a bit while the tooth gets over the prep work. Cold especially. Pressure too. Give it a week or two and it should ease off. What you’re actually watching for is pain that hangs around, comes back months or years on, or gets worse instead of better. That’s not settling. That’s a sign.

Why is my crowned tooth hurting?

Loads of things can do it, and the type of pain usually hints at which. Quick version:

What you’re feeling	Likely cause	What to do
Sore when you bite down	Crown sitting slightly too high	Quick bite adjustment
Sharp, lingering pain to hot or cold	Nerve under the crown irritated or dying	See your dentist, may need root canal
Dull ache or throbbing, worse at night	Nerve inflamed or infected	Get seen promptly
Sensitivity at the gum line	Gum recession exposing the crown edge	Dentist check, sensitive toothpaste meanwhile
Bad taste or swelling with the pain	Decay or infection under the crown	See your dentist soon
Crown feels loose or moves	Cement washed out, bacteria getting in	Book, don’t chew on it
Sore after clenching or grinding	Grinding overloading the crowned tooth	Mention it to your dentist

When it’s a brand new crown

Fresh crown, bit sensitive? Usually nothing. The tooth gets trimmed to take the crown, so it sulks for a few days, sometimes two or three weeks, while it settles. Cold twinges. A bit tender when you bite. Both fade.

The temporary’s worth a mention too. In the gap between the tooth being prepped and the real crown going on, you’re in a temporary one, and those don’t seal as well. So more cold sensitivity, a grumpy gum, the odd ache. Nearly always gone the minute the proper crown’s cemented. What’s not normal, either stage, is pain that climbs instead of easing. Flag that, don’t sit on it.

Pain that shows up years after the crown

This is the one that blindsides people. Crown was fine for years, then out of nowhere the tooth aches. A dental crown doesn’t make the tooth bulletproof. Decay sneaks in at the edge where the crown meets tooth, especially if the gum’s shrunk back and left that margin exposed. The cement holding it can break down over the years and let bacteria under. Or the nerve, still alive in there unless you’ve had a root canal, slowly gets inflamed.

Tooth you’d forgotten about suddenly kicking off? Don’t wait it out. Late pain like that usually means decay or nerve trouble, and both get worse the longer they sit.

What if the pain comes and goes?

Pain that comes and goes throws people, because the quiet spells feel like it’s fixing itself. It’s not. On-and-off pain usually means a nerve that’s irritated but not fully gone, a bite that only catches now and then, or early decay flaring up when something cold or sweet hits it. The gaps aren’t healing. What happens is the quiet bits get shorter and it slides into constant. Much easier to sort while it’s still flickering than once it’s dug in.

When the pain isn’t the crowned tooth at all

Here’s one nobody thinks of. The pain feels like it’s the crown. Sometimes it isn’t. Nerves in the mouth share wiring, so a sore tooth a couple along can throw its pain onto the crowned one and have you convinced. Crowns on the top back teeth? A blocked or infected sinus pulls the same trick, since those roots sit right under it. Sinus pain’s usually a dull pressure, worse when you bend forward, stuffy nose to go with it.

Which is why guessing at home only gets you so far. A dentist tests each tooth on its own, takes an x-ray, and finds where the pain actually starts. Not just the tooth shouting loudest.

When it’s the nerve

Sharp pain to hot or cold that lingers, or a deep throb that keeps you up, usually means the nerve inside the tooth. And yeah, the nerve’s still alive under most crowns. People forget that. Crowns tend to go on teeth that were already patched up plenty, so the nerve was sometimes on the edge before the crown turned up. Quick cold twinge that fades, fine. Pain that hangs on half a minute, or throbs on its own, is the nerve saying enough. If it tips into properly inflamed or infected, the crown’s fine but the tooth under it needs root canal treatment to settle. Crown usually stays put. The root canal goes through a small hole that gets filled after. You don’t lose the tooth by default.

When the crown feels high or hurts when you bite

Common with a new crown, and the easiest fix going. Crown sits a fraction proud, that tooth hits first every time you close, and the endless little knocks keep it sore. Dentist checks the bite with a strip of coloured paper, shaves the high spot in a couple of minutes, done. Relief’s usually on the spot. Newish crown and it’s mainly biting that hurts? This is probably all it is. Grinding at night makes it worse, since you’re hammering that tooth for hours and don’t know it, so say so if you’re a clencher.

What happens if you come in

Knowing what’s coming takes the edge off. The dentist works out where the pain’s really from first, because pain in the mouth lies and feels like it’s everywhere. They’ll check the bite, tap and test the tooth, look at the gum, see how the nerve takes cold. An x-ray shows what’s going on under the crown. Decay at the edge, the state of the root, whether infection’s started at the tip. Then it’s usually one of a few things. A bite tweak. A small repair. A root canal. Or, at the far end, a new crown. Most are simple, and catching it early keeps it that way.

Easing it while you wait for your appointment

None of this fixes the cause. Just takes the edge off till you’re seen:

Chew on the other side, leave that tooth alone
Steer clear of very hot, very cold and hard food on that side
Sensitive toothpaste helps if it’s mostly temperature
Shop painkillers, taken as the packet says, if you need them
Don’t poke at a crown that feels loose, and keep sticky food away from it

Severe pain, throbbing, or pain with swelling or a bad taste? That’s not wait-and-see. Ring the practice.

Frequently asked questions

Should a tooth under a crown hurt?

Not once it’s settled. New crown can be sensitive a week or two, then it should quiet down. Aching that lasts, comes back later, or gets worse means the tooth needs a look.

Does a crowned tooth still have a nerve?

Yes, usually. Under most crowns the tooth’s still alive, nerve and all. Only exception is if you’ve had a root canal on it. That’s the bit people miss, and it’s why a crowned tooth can still feel cold, ache, or land you needing a root canal years down the line.

How long is a new crown sensitive for?

A few days normally. Two, three weeks at the outside. Cold and pressure sensitivity while it beds in is fine, and it should be easing the whole time. If it’s growing instead, or still going strong past that, something’s up. Get it looked at.

Can a temporary crown cause pain?

Yep. Temporaries don’t seal as tight as the real thing, so you get cold twinges and a bit of tenderness while you wait. Nearly always packs up the minute the permanent one goes on.

Why does the pain under my crown come and go?

On-and-off pain usually means an irritated nerve, a bite that only catches sometimes, or early decay flaring with hot and cold. The quiet spells aren’t healing. It creeps towards constant, so get it seen while it’s still coming and going.

Can pain under a crown come from another tooth?

It can, and it catches people out. Pain runs along shared nerves, so an aching crown sometimes turns out to be the tooth next door. Or a sinus, for the ones up top. Your dentist tests each tooth on its own to find the real culprit.

Why is my crowned tooth hurting years later?

Usually decay at the crown edge, cement breaking down, or the nerve getting inflamed. A tooth that was fine for years and turns sore isn’t settling. It’s flagging something new. Get it checked.

Why does my crown hurt when I bite down?

Nearly always the crown sitting a touch proud. That tooth takes the full whack every time you close. Quick adjustment and the soreness usually lifts straight after.

Can grinding my teeth cause crown pain?

Yeah. Clenching and grinding batter the crowned tooth. Leaves it sore, wears the crown, winds up the nerve underneath. Grind in your sleep? Tell your dentist.

Can you get a cavity under a crown?

Yes. The crown caps the tooth but decay still starts where the crown meets it, along the gum line especially. Flossing that edge well helps, and your hygienist keeps an eye on it.

Will pain under a crown go away on its own?

Sometimes. If it’s a settling nerve or a bit of irritation, maybe. Decay, infection or a high bite though? That won’t sort itself, and it tends to get worse. Past a couple of weeks, or keeps coming back, book.

Do I need a root canal if my crowned tooth hurts?

Sometimes. If the nerve under the crown’s inflamed or infected, a root canal settles it, and the crown can often stay. Sharp lingering pain or throbbing is the usual giveaway the nerve’s in on it.

Is throbbing pain under a crown an emergency?

Throbbing that keeps you up, or pain with swelling, a bad taste or a fever, wants seeing quick. That’s infection talking, and it won’t clear on its own.

Can a crown be replaced if it’s causing pain?

Yes, but a new crown only helps if the crown’s the actual problem. Poor fit, broken edge, that sort of thing. Signs it might need replacing: a dark line or gap at the gum, a loose feel, decay showing on an x-ray. Often though the pain’s the tooth underneath, not the crown, so the fix is a different one.

When should I see a dentist about pain under a crown?

Book if it lasts past a couple of weeks, comes back months or years on, wakes you at night, or brings swelling or a bad taste. Earlier’s easier. A small problem under a crown doesn’t stay small.

Still getting pain from a crowned tooth?

A crowned tooth that’s aching and you can’t work out why? We’ll find the cause and sort it, whether that’s a quick bite adjustment or something more. Book with Droitwich Dental Studio on 01905 797733.