Toothache After a Filling or Crown: What’s Normal and What Isn’t

A tooth that aches after a filling or crown raises a fair question: is this normal, or a sign something’s wrong? A mild, settling ache in the first day or so is a different situation from a throbbing or spontaneous pain that isn’t easing. The distinction dentists actually use to tell these apart is whether the nerve’s reaction is reversible or not — and that’s what determines whether it settles on its own or needs further treatment.

Why a Tooth Can Ache After a Filling or Crown

The nerve inside a tooth can react to the procedure itself — the drilling, the depth of the cavity being treated, or the tooth adjusting to new material and a slightly different bite. This is described clinically as pulpitis: inflammation of the nerve tissue inside the tooth. It comes in two forms, and which one is present is what determines the outlook.

Reversible pulpitis is a temporary, irritated response. It can show up as sensitivity to hot, cold, or sweet that’s sharp but brief, easing again once the trigger is removed, along with a mild ache that settles over the following day or two, resolving on its own as the nerve settles.

Irreversible pulpitis is a more sustained reaction where the nerve doesn’t settle. It can present as a dull, throbbing ache that comes on spontaneously — without hot, cold, or biting triggering it — and lingers after any trigger is removed. Some people notice it’s worse when lying down or at night. If the nerve’s reaction doesn’t resolve, root canal treatment or, in some cases, extraction may be needed to address it.

Which of these a particular tooth is experiencing isn’t something that can be determined from the symptoms alone with certainty — it’s assessed by a dentist, and how it progresses varies between patients and procedures.

How Long It Should Take to Settle

A reversible reaction trends in one direction: less noticeable day by day, rather than staying the same or getting worse. There’s no single fixed timeframe that applies to everyone, since it depends on the individual tooth, how deep the treatment was, and the person.

What matters more than counting days is the direction it’s heading. Improving is a different situation to unchanged or worsening — and pain that’s still spontaneous or throbbing beyond the first couple of days is worth having checked rather than waiting further.

When It’s a High Bite, Not the Nerve

Not every ache after a filling or crown is about the nerve. If the restoration sits slightly higher than the surrounding teeth, it takes the brunt of the pressure every time you bite down, which can feel like a toothache concentrated on that one tooth — sharp on biting, easing when you’re not biting.

This is a mechanical issue rather than a nerve one, and it’s adjusted in a short follow-up appointment rather than needing further treatment on the tooth itself.

Signs Worth Getting Checked Promptly

• A throbbing or spontaneous ache that isn’t tied to any trigger and isn’t easing after the first day or two
• Pain that’s getting worse rather than better
• Pain that wakes you up at night, or is worse when lying down
• Sharp pain concentrated on one spot when biting down
• Swelling in the gum or face near the treated tooth

Any of these are worth having assessed rather than waiting to see if they resolve on their own — particularly a throbbing or spontaneous ache, since that pattern is more consistent with a nerve reaction that isn’t settling.

What Else Can Cause Ongoing Pain

Beyond the nerve’s initial reaction, a few other things can cause pain that goes beyond normal settling:

• Decay that wasn’t fully addressed, or has since developed — more relevant with an older filling than a recent one, but part of what a dentist checks for if pain persists.
• A restoration that isn’t fully sealed — this can allow bacteria in at the margin and cause pain to persist or return, and needs to be assessed and corrected by a dentist.

Which of these applies isn’t something that can be worked out from the symptoms alone — it needs an exam, and sometimes an X-ray, to identify.

What to Do in the Meantime

If the ache is mild and settling, over-the-counter medicine taken as directed on the packaging can help manage discomfort while it resolves. Avoiding very hot, cold, or hard foods on that side for a few days can also reduce how much the tooth is triggered.

If the pain is throbbing, spontaneous, or getting worse, these measures aren’t a substitute for having the tooth assessed — they manage the symptom, not the underlying cause, and a nerve reaction that isn’t settling won’t resolve with pain relief alone.

Frequently Asked Questions

Is it normal to have an ache in the tooth after a filling, not just sensitivity to hot or cold?

A mild ache in the first day or so, alongside or instead of triggered sensitivity, can be part of the nerve settling after treatment. A throbbing ache that comes on its own, without a trigger, and isn’t easing is a different pattern and is worth having checked.

What’s the difference between reversible and irreversible pulpitis?

Reversible pulpitis is a temporary, irritated response — sharp but brief sensitivity, or a mild ache that settles over a day or two. Irreversible pulpitis is a sustained reaction that doesn’t settle, which can feel like a spontaneous, throbbing ache. Only a dentist can determine which is present, through an exam and testing the tooth’s response.

Is it normal for a filling to hurt when I bite down?

Sharp pain concentrated on biting, especially if it isn’t easing, can indicate the filling is sitting slightly high and needs adjusting — this is checked and corrected at a follow-up appointment rather than something to work around at home. It’s a different pattern to a throbbing ache unrelated to biting.

Can a filling or crown cause pain weeks later even if it felt fine at first?

Yes. This can indicate decay has developed, or that the restoration isn’t fully sealed. It’s assessed by examining the tooth rather than something that can be identified from symptoms alone.

Should I wait to see if the pain goes away before calling?

If the ache is mild and improving, it’s reasonable to monitor it for a short period. If it’s throbbing, spontaneous, getting worse, or waking you at night, it’s worth being seen rather than waiting — treatment options tend to be broader the earlier a nerve reaction that isn’t settling gets assessed.

Toothache After Dental Work in Casula

If you’ve had a filling or crown recently and something doesn’t feel right, we’d rather check it than have you wait it out.

At Casula Dental Care, we welcome patients from Casula and the surrounding areas of Liverpool, Prestons, Lurnea, and Moorebank. Same-day appointments are available for dental pain.

Call us on (02) 9199 9695 or book online. You’ll find us at Shop 17A, Casula Mall, 1 Ingham Drive in Casula.

Any surgical or invasive procedure carries risks. Before proceeding, consider seeking a second opinion from an appropriately qualified health practitioner.