Why Does My Tooth Hurt After a Filling?

It is common to have some tooth sensitivity or soreness after a filling. Mild sensitivity to cold, heat, or pressure for a few days to a couple of weeks is normal as the tooth settles, especially with a deeper filling. The pain should steadily fade. Pain that gets worse, throbs, or lasts beyond two to three weeks is worth having checked.

At Bailey Family Dental in Whittier, we place tooth-colored fillings and always tell patients what to expect afterward, because knowing what is normal removes a lot of worry. If your bite feels off or discomfort lingers, a quick follow-up visit can usually resolve it.

Why Does My Tooth Hurt After a Filling?

A filling involves removing decay and placing new material close to the nerve inside the tooth. That nerve can stay mildly irritated for a little while, which shows up as sensitivity to cold, sweet foods, or pressure. In most cases the tooth calms down on its own as the nerve recovers. The key thing to watch is the direction of the pain: normal post-filling sensitivity gets a little better each day, while a problem tends to stay the same or worsen.

What Are the Common Causes?

Nerve irritation from the procedure

The most common reason is simple irritation of the nerve from cleaning out the decay, particularly with a deep or large filling. This usually eases within one to two weeks and responds well to a sensitivity toothpaste.

A bite that sits too high

If the new filling is even slightly taller than the surrounding tooth, you may feel a sharp pain when biting down or a sore, bruised feeling. This is an easy fix: we simply adjust the filling so your bite meets evenly. If your tooth hurts when biting down after a filling, let us know.

Cold or temperature sensitivity

Short, sharp sensitivity to cold that fades quickly is usually normal for a couple of weeks. If sensitivity to cold lingers or intensifies, it is worth a look. You can read more about what causes tooth sensitivity in general.

Referred or lingering discomfort

Sometimes a nearby tooth aches, or you notice a dull, intermittent ache as the tooth settles. Mild versions are normal early on; persistent or growing pain is not.

How Long Should It Last?

Most post-filling sensitivity fades within a few days and is gone within two to three weeks. During that time it should trend downward. If discomfort is still there after three weeks, is getting stronger, or wakes you at night, contact us so we can find the cause rather than waiting it out.

When Should I Call the Dentist?

Call us if you have sharp pain when biting, pain that increases over time, throbbing or spontaneous pain, sensitivity lasting beyond two to three weeks, or swelling. Occasionally a deep cavity leaves the nerve too inflamed to recover, and the tooth may need root canal treatment — but that is the exception, not the rule. Most sore teeth after a filling just need a small bite adjustment or a little time.

Tooth Pain After a Filling FAQs

Is it normal for a tooth to hurt after a filling?

Yes. Mild sensitivity to temperature and pressure for a few days up to two weeks is normal, especially after a deeper filling. It should ease steadily. Pain that worsens or lasts longer should be checked.

What can I do to relieve the pain at home?

Avoid very hot, cold, and hard foods on that side, use a sensitivity toothpaste, and take an over-the-counter pain reliever if needed. If your bite feels high or the pain is sharp, call us for a quick adjustment instead of waiting.

Could the pain mean the filling failed?

Not usually. Early sensitivity is typically nerve irritation or a high bite, both easily managed. A failed or lost filling is different; here is what to do if a filling falls out.

Related Filling Resources

• Tooth-Colored (Composite) Fillings
• Cavity Treatment
• Tooth Sensitivity to Cold
• Tooth Pain When Biting Down
• Root Canal Treatment in Whittier
• How Long Do Tooth-Colored Fillings Last?
• What To Do If You Lose a Filling or Crown

Reviewed by Brian Choi, DMD
General Dentist at Bailey Family Dental in Whittier, CA
Updated: October 2026