Why Is My Tooth Hurting After Filling? 7 Causes & Fixes

A tooth hurting after a filling is usually caused by normal post-procedure inflammation, a filling that sits too high on your bite, or temporary sensitivity to temperature—most cases resolve on their own within 2 to 4 weeks without any additional treatment.

Post-filling discomfort is one of the most common concerns patients bring up with their dentists, and while it can feel alarming, it rarely signals a serious problem. The drilling, vibration, and manipulation required to remove decay and place filling material irritates the pulp (the nerve-containing tissue inside your tooth), causing inflammation that needs time to settle. In some cases, the pain points to an issue that does require a follow-up visit—like a filling that needs adjustment or an underlying infection. Understanding the difference between normal healing and warning signs helps you decide whether to wait it out or call your dentist.

What Causes Tooth Pain After a Dental Filling?

Post-filling tooth pain stems from seven main causes: normal inflammation, a high bite, pulp irritation, temperature sensitivity, referred pain, galvanic shock from mixed metals, or—less commonly—an allergic reaction to filling materials.

The type of pain you feel, when it occurs, and how long it lasts all help narrow down the cause. Below, we'll walk through each possibility so you can identify what's happening in your mouth.

Is Some Pain Normal After Getting a Filling?

Yes—mild to moderate discomfort for a few days after a filling is completely expected. The drilling process generates heat and vibration that temporarily inflame the pulp. Your tooth may feel tender when you bite down or ache dully for 24 to 72 hours.

According to the American Dental Association, "It's normal for your tooth to be sensitive after a filling. Your dentist will likely recommend avoiding very hot or cold foods and beverages for a few days."

This normal sensitivity should improve each day, not worsen. If pain intensifies after the first 48 hours rather than fading, that's a sign something else may be going on.

Can a Filling That's Too High Cause Pain?

Absolutely. A "high" filling—one that sits above your natural bite line—is one of the most common fixable causes of post-filling pain. When you close your mouth, that tooth hits first, absorbing more force than it should with every bite and swallow.

Signs your filling may be too high:

• Sharp pain when you bite down or chew
• The filled tooth feels like it touches before other teeth
• Pain worsens throughout the day as you eat
• You find yourself avoiding chewing on that side

This is an easy fix. Your dentist can adjust the filling in minutes by polishing down the high spots. Don't wait it out—an untreated high filling can crack the tooth or cause chronic jaw pain.

Does Pulp Irritation Lead to Prolonged Pain?

Deep cavities that extended close to the pulp require more drilling, which means more trauma to the nerve. Even though your dentist successfully removed all the decay, the pulp may remain inflamed for weeks.

Pulpitis (pulp inflammation) comes in two forms:

If your pain comes and goes with specific triggers and disappears within seconds, you're likely dealing with reversible pulpitis. Pain that lingers for minutes or throbs without provocation suggests irreversible damage.

Why Do Hot and Cold Foods Trigger Sensitivity?

New fillings temporarily disrupt the protective layers of your tooth. The dentin (the layer beneath enamel) contains microscopic tubules that lead directly to the pulp. Until your tooth settles and seals properly, hot coffee and ice cream can send sharp signals straight to the nerve.

Composite (tooth-colored) fillings may cause more initial sensitivity than amalgam (silver) fillings because of how they bond to tooth structure. The bonding process can create tiny gaps that allow temperature transmission until the filling fully integrates.

Most temperature sensitivity resolves within 2 to 3 weeks. Using a desensitizing toothpaste containing potassium nitrate can help block those open tubules faster.

Could Referred Pain Be Making Your Gums Hurt?

Sometimes the tooth itself isn't the main source of discomfort—pain can radiate from the filled tooth to surrounding gums, adjacent teeth, or even your jaw. This referred pain happens because nerves in your mouth share pathways, and your brain has trouble pinpointing exactly where the signal originates.

If you notice your gums hurting near the filled tooth, the inflammation inside the tooth may be spreading to nearby soft tissue. Gum soreness can also result from:

• The dental dam or matrix band pressing on tissue during the procedure
• Injection site tenderness from anesthesia
• Accidental irritation from dental instruments

This type of gum pain typically peaks at 24 to 48 hours and fades by day five.

Also Read: Why Is My Gum Swollen in One Spot? 6 Causes & Fixes

What Is Galvanic Shock and Could It Affect You?

If you have a new amalgam filling placed near an existing gold crown (or vice versa), you may experience galvanic shock—a sharp, electric-like jolt when the two metals touch. Saliva acts as a conductor, creating a tiny electrical current between dissimilar metals.

Galvanic shock feels like biting on aluminum foil: sudden, startling, and brief. It typically diminishes as your teeth adapt, but if it persists beyond a few weeks, your dentist may recommend replacing one of the restorations with a non-metallic option.

Are Allergic Reactions to Filling Materials Possible?

Rare, but yes. Some patients react to components in amalgam fillings (particularly mercury, though it's bound in a stable compound) or to metals like nickel in some alloys. Composite fillings contain resins that can occasionally trigger sensitivity in allergic individuals.

Signs of an allergic reaction include:

• Itching or rash in your mouth or on your face
• Swelling of the gums around the filling
• Symptoms that appear within hours to days of placement

If you suspect an allergy, contact your dentist. They can test you and replace the filling with an alternative material like ceramic or gold.

How Long Should Post-Filling Pain Last in 2026?

Normal post-filling discomfort should noticeably improve within the first week and fully resolve within 2 to 4 weeks—any pain that worsens after day two or persists beyond one month warrants a dental evaluation.

The timeline depends on several factors: how deep the cavity was, what type of filling material was used, and your individual healing response. Here's what to expect:

"Sensitivity from a filling should go away in two to four weeks. If the sensitivity does not seem to be getting any better during that time, contact your dentist." — Cleveland Clinic

When Should You Call Your Dentist?

Contact your dentist if pain intensifies after the first 48 hours, throbs without provocation, keeps you awake at night, or persists beyond four weeks—these patterns suggest complications that won't resolve on their own.

Red flags that require prompt attention:

• Spontaneous, throbbing pain (not triggered by eating or drinking)
• Pain lasting longer than 30 seconds after a hot or cold stimulus
• Swelling in your gums, face, or jaw
• Fever accompanying dental pain
• A visible crack in the filling or tooth
• Pus or a bad taste near the filled tooth

These symptoms may indicate irreversible pulpitis, an abscess forming beneath the tooth, or a cracked filling that's allowing bacteria inside. Waiting can lead to more invasive (and expensive) treatments.

Also Read: Why Is My Tooth Throbbing? 8 Causes & What to Do Now

How to Manage Post-Filling Tooth Pain at Home

You can ease normal post-filling discomfort by taking over-the-counter pain relievers, avoiding temperature extremes, chewing on the opposite side, and using desensitizing toothpaste for 2 to 4 weeks.

These home strategies help you stay comfortable while your tooth heals:

1. Take ibuprofen or acetaminophen. Ibuprofen (Advil, Motrin) reduces inflammation, while acetaminophen (Tylenol) manages pain. Follow package directions and don't exceed recommended doses.

2. Avoid very hot and cold foods. Stick to lukewarm drinks and room-temperature meals for the first week. This prevents triggering sensitive dentin tubules.

3. Chew on the opposite side. Give the filled tooth a break from biting pressure for 24 to 48 hours, longer if it was a large filling.

4. Switch to desensitizing toothpaste. Products containing potassium nitrate (like Sensodyne) block nerve signals in exposed dentin. Use consistently for at least two weeks.

5. Brush gently near the filling. A soft-bristled toothbrush prevents additional irritation while you heal.

6. Skip the ice. While cold packs help many injuries, applying ice directly to your face near a sensitive tooth can trigger more pain.

If you grind your teeth at night, consider wearing a night guard temporarily to prevent excess pressure on the new filling while your bite adjusts.

Could the Problem Be Something Other Than the Filling?

Sometimes post-filling pain isn't about the filling at all—cracked tooth syndrome, a developing abscess, or sinus pressure can mimic filling-related discomfort.

If your pain doesn't follow the typical post-filling pattern, consider these possibilities:

• Cracked tooth: The drilling or biting forces may have caused a hairline crack that wasn't visible during the procedure. Pain occurs when biting releases the crack's edges. Your dentist may need X-rays or a bite test to detect it.

• Secondary decay: In older fillings being replaced, decay may have extended deeper than anticipated. If bacteria reached the pulp, infection can develop after the filling is placed.

• Sinus issues: Upper back teeth sit close to your sinuses. A sinus infection can create pressure that feels exactly like tooth pain, especially in recently filled teeth.

• Adjacent tooth problems: The tooth next to your filling may have its own issue—a cavity, crack, or gum recession—that became noticeable around the same time.

Also Read: Why Is My Tooth Sore When I Bite Down? 6 Causes & Fixes

In Short

Post-filling tooth pain is almost always temporary inflammation from the drilling process, a bite that needs minor adjustment, or sensitivity that fades as your tooth heals over 2 to 4 weeks. Use over-the-counter pain relievers, avoid temperature extremes, and give your tooth time to settle. Call your dentist if pain worsens after day two, throbs on its own, or continues beyond one month—these signs point to complications like irreversible pulpitis or infection that require professional treatment.

What You Also May Want To Know

Why Is My Gum Hurting After a Filling?

Gum soreness near a new filling usually results from the dental instruments, injection site, or rubber dam pressing on your tissue during the procedure. The inflamed pulp inside your tooth can also cause referred pain that radiates into nearby gums. This typically resolves within 3 to 5 days. If swelling, redness, or pus develops, contact your dentist to rule out infection.

How Do I Know If My Filling Is Too High?

Your filling is likely too high if you feel it touching before your other teeth when you bite down, if pain sharpens when chewing, or if discomfort worsens throughout the day. Try biting on thin articulating paper or ask someone to watch your jaw when you close—if it shifts to one side, the filling may be forcing your bite off-center. A quick adjustment visit fixes this problem.

Can a Filling Cause Permanent Nerve Damage?

It's possible but uncommon. Deep cavities near the pulp carry a higher risk of nerve damage. If the drilling traumatized the nerve beyond its ability to heal, irreversible pulpitis develops, and the nerve eventually dies. Signs include persistent throbbing, pain that lingers for minutes after eating, and sensitivity to heat. A root canal removes the damaged nerve and saves the tooth.

Should I Take Pain Medication After Getting a Filling?

You don't have to, but over-the-counter pain relievers help manage normal post-filling discomfort. Ibuprofen works well because it reduces inflammation, while acetaminophen targets pain signals directly. Taking a dose before your anesthesia wears off can prevent pain from spiking. Avoid aspirin immediately after the procedure, as it can promote bleeding if your gums were nicked.

When Is Post-Filling Pain a Dental Emergency?

Seek urgent care if you develop facial swelling, fever, difficulty breathing or swallowing, or severe pain that doesn't respond to medication. These symptoms may indicate a spreading infection (dental abscess) that requires antibiotics and drainage. Spontaneous throbbing that wakes you at night also warrants a same-day call—it often means the nerve is dying and needs immediate attention.

Reviewed and Updated on May 1, 2026 by George Wright