Tooth Pain After a Filling: Why It Hurts and When to Call

September 15, 2026
Star Dental

Star Dental · Patient guide

A recently filled tooth can be sensitive, but pain is not something you have to explain away. Brief sensitivity that is easing is different from worsening pain, a bite that feels wrong, or pain that continues after hot or cold food is gone. Contact the dentist who placed the filling if symptoms are not settling or you are unsure what to expect. Ask for urgent advice for severe pain, swelling or fever. [1] · [2]

Illustrative molar model with a tooth-colored filling beside a dental mirror. — Illustrative tooth model, not a patient case. Pain needs an assessment of the tooth, filling and bite.

This guide is for a filling that is still in place. If material has come out or a corner is missing, use our lost-filling guide or broken-tooth service page. You do not need to identify the problem before asking for help.

Start with the pattern, not a diagnosis

Tell the dental team what starts the pain, whether it stops afterward, and how it compares with yesterday. Use the table to describe your symptoms—not to choose your own treatment.

What you notice	What it can mean	What to do
A brief cold sensation that stops when the trigger is gone	Recent treatment can temporarily irritate the tissue inside a tooth.	Follow your dentist’s instructions; call if it persists, worsens or concerns you.
The filled tooth seems to touch first, or your bite feels uneven	The filling may be interfering with how your teeth meet.	Call for a bite check. Do not try to wear it down yourself.
A sharp pain during chewing or when releasing a bite	Several problems, including a crack, can cause this pattern.	Avoid testing it with hard food and arrange an assessment.
Heat or cold starts pain that lingers, or pain begins without eating	The tissue inside the tooth may need further evaluation.	Contact the dentist promptly; ask for urgent advice if pain is severe.
Swelling, fever, drainage or a bad taste with tooth pain	Infection is one possible cause.	Seek urgent dental advice, even if a pain reliever helps.

Sources: [1], [2], [3], [4].

Why a filled tooth may still feel sensitive

A filling repairs the damaged part of a tooth; it does not remove the living tissue inside it. That tissue, called the pulp, contains nerves and blood vessels. A deep cavity or previous injury may have affected it before the filling was placed. The dentist needs to distinguish a tooth that can recover from one that needs additional care. [5]

Sensitivity also has causes outside the pulp. Exposed root surfaces, enamel wear, decay and problems with a restoration can all produce sensitivity. That is why changing toothpaste is not a substitute for having a painful tooth checked. The appropriate treatment depends on the cause. [6]

What if my bite feels high?

Say, “This tooth seems to hit before the others,” if that describes it. A dentist can check the contacts and reshape a filling when appropriate. This does not mean every painful bite needs an adjustment; the tooth itself also needs assessment. Do not file the filling, force your teeth together or keep chewing on something hard to test it. [2]

What happens at a follow-up visit?

Bring the treatment date, the name of the office that placed the filling, and your current medicines. Explain whether the tooth hurt before treatment and whether today’s problem feels the same or different.

The dentist may examine the filling and gums, check your bite, and use temperature, tapping or biting tests. X-rays may help assess the tooth and surrounding tissues. Results are considered together; a photograph or one test cannot settle every diagnosis. Sometimes reassessment or an endodontist’s opinion is needed. [7]

Useful questions to ask are:

What finding best explains my symptoms?
Is the plan to monitor, adjust the filling, repair something or investigate further?
What change should make me call sooner?
If we are monitoring, when and how will you check the tooth again?

Ask for a specific follow-up plan instead of leaving with “wait and see” alone. If the office has advised monitoring and symptoms change, update the team rather than assuming the earlier advice still applies.

How to stay comfortable while waiting for advice

Follow the instructions from your treating dentist, especially if the filling is temporary or another appointment is planned.

Choose soft foods and chew away from the sore tooth. Avoid very hot, cold or sweet foods that trigger pain. Brush gently with a soft toothbrush. [8]
Ask whether sensitivity toothpaste is appropriate. It can help some kinds of sensitivity, but may need repeated use and will not correct every underlying problem. [6]
If you need pain relief, ask your dentist or pharmacist what is safe with your health conditions and other medicines. Follow the label or your clinician’s instructions; do not increase the amount because the tooth still hurts. [9] · [10]
Never put aspirin against the tooth or gums, and do not poke around the filling with sharp tools. [11]

A short note on your phone can help: “Cold water starts it; it continues after I stop drinking; I could sleep yesterday but not tonight.” There is no need to provoke symptoms to collect this information.

When not to wait for a routine appointment

Ask for urgent dental advice if pain is severe enough to disrupt sleep or daily activities, remains troublesome despite pain relief, or is accompanied by a growing lump or swelling. [12]

Call 911 for trouble breathing or swallowing. Get emergency medical care for swelling around the eye or neck, vision changes, extensive mouth swelling or marked difficulty opening your mouth. Do not wait for a dental callback in a medical emergency. [10]

Questions about pain after a filling

How long should I wait for sensitivity to settle?

There is no waiting period that makes all pain safe to ignore. The important details are the pattern, severity and direction of change. Ask the treating office what they expect for your tooth and when they want to hear from you. Persistent or worsening pain deserves review. [1]

Does pain mean I need a root canal?

Not automatically. A dentist must establish the cause before recommending treatment. A bite problem and a pulp problem are different findings. Ask what the examination shows and why a proposed treatment fits it. [7]

The tooth never hurt before the filling. Was something done wrong?

The timing alone cannot answer that. Some dental problems produce few symptoms before treatment, and new symptoms need their own assessment. Tell the dentist exactly what changed and ask them to explain the findings; pain is a reason for follow-up, not proof of a mistake. [7]

Would antibiotics help the pain?

Antibiotics are not the usual treatment for most pain from the pulp or tissues around a root. Dental treatment may be needed instead. Do not start leftover antibiotics; the dentist decides whether your condition warrants a prescription. [13]

What should I do if floss catches beside the new filling?

Tell the office which area catches and whether the floss shreds, food collects there or the gum hurts. Do not repeatedly force it through or use a pointed object. Ask the dentist to check the area and show you how to clean it comfortably. [11]

Should I return to the same dentist?

Start with the treating office when possible: explain that this is a concern after a recent filling, not a routine checkup. If that office is unavailable or you want another assessment, share the treatment date and ask how relevant records can be transferred. Ask about any follow-up charge when booking; this guide cannot determine an office’s policy.

Need a filling checked in Denver?

Call Star Dental at 303-222-1414 to describe your symptoms and check appointment availability before arriving. Tell the team when and where the filling was placed and whether pain is changing. Learn about our dental fillings and cavity treatment. This guide provides general information, not a diagnosis.

Call 303-222-1414

Sources and further reading

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