How Long Should My Tooth Hurt After a Root Canal?

Everyone heals a little differently, but a typical course looks like this:

• First 24 hours: numbness fades; mild tenderness begins as the anaesthetic wears off.
• Days 1–3: the tooth is tender, especially to biting; the jaw may ache. This is usually the peak and is manageable with simple measures (see managing discomfort after a root canal).
• Days 3–7: soreness steadily improves.
• By about a week: most people are comfortable, with little or no tenderness.

Occasionally a tooth that was very inflamed or infected beforehand takes a little longer to settle. The key feature of normal recovery is direction: it should be getting *better*, not worse.

A root canal removes the pulp, but the tissues around the root tip can stay inflamed for a few days as they recover — and your jaw is tired from being open. So a "bruised," tender feeling is part of normal healing, not a warning sign in itself. The full recovery overview is in recovery in the first 48 hours.

Contact your dentist if you notice any of the following, which fall outside the normal settling pattern:

Difficulty breathing or swallowing is a medical emergency — seek immediate care. Broader urgent-symptom guidance is in dental abscess warning signs.

This article is about the days right after treatment. Sometimes a treated tooth develops trouble much later — weeks, months or years on — which is a different situation covered in swelling after a root canal weeks later and signs of root canal failure. If your tooth settled nicely and then flares up long afterward, those articles are the relevant ones.

• Use pain relief as directed and keep pressure off the tooth (soft foods, chew on the other side).
• Don't test it with hard or chewy foods, especially with a temporary filling.
• Keep your restoration appointment — an unprotected back tooth can stay sensitive and is at risk of fracture (see delaying the crown after a root canal).
• Call if it's not improving — a slightly high filling is a common, easily fixed cause of lingering soreness.

When you are judging your own recovery, the single most useful question is not "how much does it hurt?" but "which way is it heading?" Normal healing has a clear shape: tenderness that is at its worst in the first day or two and then eases steadily. A tooth can be quite sore on day one and still be recovering perfectly well, as long as it is improving by day three or four. Conversely, pain that is mild but *increasing* after the first couple of days is more concerning than moderate pain that is fading. So track the trend, not just the level. A soreness diary — even a mental one — of "better, same, or worse than yesterday" tells you and your dentist far more than a single snapshot of how it feels right now.

If your recovery is dragging slightly but not alarmingly, there are a few ordinary explanations worth knowing:

• A slightly high filling or temporary. If the restoration sits a touch too tall, the tooth takes extra force with every bite and stays tender. A quick adjustment usually fixes it — worth a call.
• A tooth that was badly infected beforehand. These sometimes take a little longer to settle, though still trending better.
• Jaw fatigue from keeping your mouth open, which can linger a day or two and is separate from the tooth itself.

None of these is an emergency, but the first — a high bite — is both common and easily remedied, so if the tooth feels like it "hits first" or the bite seems off, mention it rather than waiting it out. Anything trending the wrong way, or with swelling or fever, moves into the "call your dentist" category above.

Is it normal for my tooth to hurt a week after a root canal?

Mild residual tenderness at a week can happen, especially if the tooth was badly infected, but it should be clearly improving. If it is the same or worse, contact your dentist.

The pain is worse than yesterday — should I worry?

Worsening pain after the first couple of days is not the expected pattern. Call your dentist to have it checked, particularly with any swelling or fever.

My bite feels off and the tooth stays sore — why?

A filling or temporary sitting slightly high puts extra force on the tooth and keeps it sore. It is common and usually fixed with a quick adjustment.

Could pain months later be related to the same tooth?

Possibly, but that is a different scenario from normal post-treatment soreness — see signs of root canal failure and swelling weeks later.

If your recovery isn't following the usual improving pattern, we would rather check it than have you wait. Learn about root canal treatment in Markham or contact our team.