Tooth sensitivity after a filling: how long does it last?

Causes, what to watch for and when to contact a dentist.

Temporary sensitivity to cold, sweet foods or biting can occur after a filling. Pain that is worsening, occurs on its own or does not go away should be assessed by a dentist.

Why can a tooth become sensitive?

A treated tooth may react to temperature or chewing for a while. The depth of the treated area, the condition of the pulp and other factors can play a role. Discomfort when biting is sometimes related to the height of a filling, but an examination is needed to establish the cause.

Which symptoms should you watch?

Notice whether sensitivity is brief and triggered by something specific, or whether pain occurs on its own, lasts a long time, gets worse at night or makes biting difficult. Tell your dentist when it started and whether it is improving.

How long can sensitivity last?

Duration varies with the treatment and the condition of the tooth. Your dentist can explain what to expect in your situation. If symptoms do not improve within the time advised, get worse or worry you, contact the clinic without waiting.

What does the dentist check?

The dentist may assess your bite, the edges of the filling and the tooth’s response to stimuli and take an X-ray if needed. Depending on the cause, adjusting the restoration may help, while other treatment is sometimes needed. Severe pain does not automatically mean that root canal treatment will be necessary.

What can you do before an appointment?

Avoid things that clearly trigger pain, chew carefully and maintain gentle oral hygiene. Do not try to file down or remove the filling yourself. Ask your dentist or pharmacist about pain relief suitable for you.

When should you seek urgent help?

If you develop swelling, fever, severe pain or pain that does not go away, contact a dentist as soon as possible. If you have difficulty breathing or swallowing, call 112.

FAQ

Frequently asked questions

Yes. During an examination the dentist can check how your teeth meet and assess other possible causes of pain.

No. What matters is the type and duration of the sensitivity and whether it is improving.

Dental fillings

This information is for patient education and does not replace an individual examination, diagnosis or treatment plan. Updated 30 October 2026.

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