Teeth Sensitivity After Fillings: Causes, Tips, and When to See a Dentist

Getting a dental filling is one of the most common treatments for repairing cavities and restoring tooth function. While the procedure itself is routine, many patients experience teeth sensitivity after fillings. In most cases, this sensitivity is temporary—but sometimes it can signal an underlying issue that needs attention.

In this guide, we’ll explain why sensitivity happens after a filling, how long it typically lasts, and what you can do to relieve discomfort.

Why Do Teeth Feel Sensitive After Fillings?

It’s normal to notice some sensitivity in the days after your dentist places a filling. Common causes include:

• Irritation from the procedure – Local anesthetic injections and dental drilling can temporarily irritate surrounding nerves.

• Material sensitivity – Some patients react differently to resin composite or amalgam filling materials.

• Bite misalignment – If the filling is slightly higher than your natural bite, it can cause pressure and discomfort when chewing.

• Pulp inflammation (pulpitis) – In rare cases, the inner tooth nerve may become inflamed, leading to prolonged sensitivity.

How Long Does Sensitivity Last After a Filling?

• Mild sensitivity (to hot, cold, or pressure) usually lasts a few days to two weeks.

• Persistent or worsening sensitivity beyond two weeks may indicate a problem with the filling or underlying tooth.

👉 If sensitivity continues or feels severe, it’s best to contact your dentist right away to avoid complications that could require treatments like a root canal.

Tips for Managing Tooth Sensitivity After Fillings

Until your tooth fully adjusts, these steps can help minimize discomfort:

1. Switch to a Soft-Bristled Toothbrush

A soft-bristled brush is gentler on enamel and gums, reducing irritation.

2. Use Toothpaste for Sensitive Teeth

Desensitizing toothpaste can block nerve signals that trigger sensitivity. Use twice daily for best results.

3. Brush & Floss Gently

Good oral hygiene is crucial after a filling—but avoid scrubbing too hard near the treated tooth.

4. Avoid Hard & Crunchy Foods

Hard snacks like chips or nuts can stress the filling and increase pain. Stick to softer foods until sensitivity subsides.

5. Limit Extreme Temperatures

Very hot or cold foods and drinks often trigger sharp discomfort. Choose room-temperature meals during recovery.

6. Cut Back on Sugary & Acidic Foods

Sugar and acids (sodas, citrus, coffee, alcohol) can worsen sensitivity and irritate enamel.

7. Rinse After Meals

Use lukewarm water or a sensitivity-friendly mouthwash to wash away food particles and acids.

8. Consider Over-the-Counter Pain Relief

If discomfort is bothersome, ibuprofen or acetaminophen can help—but persistent pain should be checked by a dentist.

When Sensitivity Signals a Problem

While temporary discomfort is normal, contact your dentist if you notice:

• Pain lasting longer than 2 weeks

• Severe throbbing or sharp pain

• A filling that feels “too high” when you bite

• Swelling or signs of infection

Delaying treatment can worsen the problem and may lead to advanced procedures such as dental crowns or even a root canal.

Restoring Comfort With Expert Care

At La Mirada One Dental, we use high-quality dental fillings and advanced techniques to ensure both durability and comfort. If you’re experiencing prolonged tooth sensitivity, our team will carefully evaluate the filling and recommend the right solution to restore comfort.

👉 Don’t wait for sensitivity to worsen—schedule an appointment today and let us help you get back to a pain-free smile.