Sensitivity After a Filling: What Should Improve, and When to Call

A brief twinge from cold after a cavity filling can be temporary. Recent dental work can inflame the pulp—the living tissue inside the tooth—even though the cavity has been repaired. But pain when biting, lingering temperature pain, or worsening symptoms should not simply be treated as normal recovery. The American Association of Endodontists (AAE) distinguishes these patterns.

How long should sensitivity last?

Cleveland Clinic’s filling guidance says minor sensitivity usually goes away within one to two weeks. The AAE’s broader guidance for sensitivity after dental treatment allows two to four weeks, with a dental check if pain persists or worsens.

These are recovery ranges, not a requirement to wait through pain. Mild, brief sensitivity that is becoming less noticeable is more reassuring than discomfort that stays unchanged or intensifies. If it is not clearly improving after about two weeks, contact the treating dentist for advice rather than automatically waiting a full month. Follow any earlier review instructions your dentist gave you.

Why a filled tooth can still hurt

There are several possibilities, and the symptom pattern helps guide the examination:

• Temporary pulp irritation: Recent dental treatment can inflame the tissue inside the tooth and produce short-lived hot or cold sensitivity. This does not, by itself, establish that you need a root canal. AAE guidance
• The filling interferes with your bite: Pain when closing or chewing may come from the new filling contacting the opposing tooth incorrectly. A dentist can reshape the filling to correct this. If the filled tooth seems to touch first, mention that when you call. Cleveland Clinic
• Another tooth or restoration problem: Sharp biting pain can also be associated with a loose filling, a crack, or damage to the pulp. Intense pain that lingers after heat or cold can indicate more serious pulp damage. Symptoms alone cannot reliably distinguish these causes. AAE guidance

A filling repairs tooth structure; it does not guarantee that irritated or damaged pulp will recover. If that is the concern, see our guide to how dentists decide between a deep filling and root canal treatment.

What can help while it settles?

For mild, improving sensitivity:

• Temporarily avoid temperature triggers. Choose lukewarm rather than very hot or icy food and drinks if those provoke discomfort.
• Keep cleaning gently. Use a soft or extra-soft toothbrush rather than scrubbing the sensitive area. AAE guidance
• Try toothpaste labeled for sensitive teeth. These toothpastes can help some forms of sensitivity by reducing transmission of sensations to the nerve, but usually need several applications—not one use—to help. They will not correct a bite problem, crack, or damaged pulp. ADA sensitivity guidance
• Use pain relief only if appropriate for you. Acetaminophen or ibuprofen can help with post-filling soreness or sensitivity. Follow the label and ask a pharmacist if medical conditions or other medicines make the choice uncertain. Cleveland Clinic

Relief measures are for comfort while symptoms improve or while you arrange a check—not a substitute for finding the cause of persistent pain.

When to call sooner

Arrange a prompt dental check for sharp biting pain, a bite that feels uneven, worsening pain, or temperature pain that continues after the trigger is gone. The AAE flags lingering hot or cold pain, typically more than 30 seconds, as concerning for pulp damage; that is a warning pattern, not a stopwatch diagnosis. AAE guidance

Seek urgent dental care for severe pain that does not respond to medication, facial or jaw swelling, fever, or chills. Seek emergency medical care for difficulty breathing or swallowing, substantial mouth swelling, or swelling affecting the eye. Cleveland Clinic; NHS abscess guidance

What to tell the dentist

Give the filling date, what triggers the pain, how long each episode lasts, whether the tooth hurts without a trigger, and whether it is improving. Then ask:

• “Can you check whether the filling is interfering with my bite?”
• “Does this look like temporary irritation, or is there evidence of a filling, crack, or pulp problem?”
• “What improvement should I expect, and when should you reassess it?”
• “If further treatment is recommended, what findings support it?”

Start with the dentist who placed the filling. If examination suggests pulp damage, they may refer you to an endodontist—a specialist in treatment inside the tooth. AAE guidance