Mild throbbing for one to two weeks after a filling is usually normal as the tooth's nerve calms down. Worry, and call your dentist, if pain wakes you at night, intensifies over days, lingers more than 30 seconds after cold, or comes with swelling or fever. These can signal a high bite, cracked tooth, or irreversible pulpitis needing prompt care.

It is one of the most common late-night searches we see from our Aloha and Beaverton patients. You left the office numb a few days ago. Now the tooth is pulsing while you try to fall asleep, and you are not sure if this is part of healing or a problem. At Line Dental Aloha, we want to walk you through what's normal, what isn't, and exactly when to pick up the phone.

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

Yes, mild throbbing or sensitivity is normal in the first one to two weeks. When we remove decay, the drill creates tiny vibrations and a small amount of heat near the pulp (the nerve inside your tooth). The pulp reacts by becoming temporarily inflamed. That inflammation is what you feel as a dull ache, cold sensitivity, or short throbs after chewing.

According to the ADA, mild post-operative sensitivity after a composite filling is common and typically resolves within one to two weeks. The key word is resolves. The pain should fade day by day, not build.

How long should post-filling pain last?

Here is a realistic timeline we share with patients in our operatory:

• Shallow composite fillings: 1 to 7 days of mild cold or pressure sensitivity.

• Medium composite fillings: up to 14 days of intermittent throbbing or cold zing.

• Deep fillings close to the nerve: 2 to 4 weeks before everything fully settles.

The trend matters more than the exact day count. Each morning should feel a little better than the last. If it does, you are healing. If pain plateaus or worsens past day three, something else is going on.

What causes throbbing pain after a filling?

There are five common culprits we look for during a post-op exam.

1. A high bite

If the filling sits even a fraction of a millimeter too tall, your jaw concentrates chewing force on that one spot. Every bite becomes a small punch to the nerve. This is the easiest fix in dentistry. We mark the bite with articulating paper and polish the high spot down in about two minutes.

2. Reversible pulpitis

The nerve is inflamed but still healthy. Sensitivity to cold is sharp but goes away within seconds. With time and a calm tooth, the pulp recovers on its own.

3. Irreversible pulpitis

The nerve has been pushed past the point of healing. The American Association of Endodontists notes that pulpitis can be reversible or irreversible, with the irreversible form requiring root canal therapy or extraction. Pain lingering more than 30 seconds after a cold sip is the classic warning sign.

4. A hidden crack

Sometimes a tooth needed a filling because a crack let bacteria in. The filling repairs the surface, but the crack still flexes when you chew. That sharp pain on release of biting pressure is the giveaway.

5. Galvanic shock or microleakage

If the new filling touches an old metal crown across the bite, a tiny electrical zing can occur. Microleakage at the bonding edge can also cause brief cold sensitivity that fades as the tooth seals itself with secondary dentin.

When does throbbing become a dental emergency?

Call us the same day if you notice any of these:

• Pain that wakes you up at night with no trigger

• Cold or hot sensitivity that lingers more than 30 seconds (a hallmark of irreversible pulpitis, per the AAE)

• Throbbing that gets worse each day instead of better

• Swelling in the gum, cheek, or jaw

• Fever, a bad taste, or a pimple-like bump near the tooth

A mom in the Five Oaks neighborhood called us last spring after her teenage son had a filling two weeks earlier. The pain had crept up, not down. We saw him the next morning, found pulpitis on cold testing, and got him into a root canal before the swelling spread. That call probably saved the tooth.

What can you do at home while you wait?

For mild post-op tenderness, a few small habits help:

• Take ibuprofen as directed on the label if it is medically appropriate for you. It targets inflammation, which is the real driver of throbbing.

• Chew on the opposite side for a few days.

• Skip very hot, very cold, and very sugary foods while the tooth calms down.

• Rinse with warm salt water two or three times a day if the gum around the tooth feels tender.

• Do not place aspirin directly on the gum. The ADA warns that aspirin in contact with soft tissue causes a chemical burn.

Home care buys time. It is not a cure.

How we diagnose and fix post-filling pain at Line Dental Aloha

When you come in, the visit is usually short and methodical.

1. Bite check first. We mark your bite with thin articulating paper. If the filling is high, a quick polish fixes the pain on the spot. Many patients walk out within fifteen minutes.

2. Cold and percussion testing. We compare the suspect tooth to its neighbors. How sharp is the response? How long does it linger? This tells us whether the pulp is reversibly or irreversibly inflamed.

3. Digital X-ray. We rule out hidden decay beneath the filling, cracks, or changes at the root tip that suggest infection.

4. A clear plan. Depending on what we find, options range from a two-minute bite adjustment to replacing the filling to a root canal if the nerve cannot recover.

We hold same-day emergency slots for patients across Aloha, Beaverton, and Hillsboro, which matters when you are an Intel or Nike employee trying to squeeze a visit between meetings. Off TV Highway, just minutes from Highway 217. Easy in, easy out.

Frequently Asked Questions

Why does my filling hurt when I bite down?

The most likely cause is a high bite. The new filling sits a hair too tall, so your jaw lands on it first with every chew. That focused pressure inflames the nerve and ligament. A simple two-minute occlusal adjustment with articulating paper usually solves it completely.

Can a filling cause nerve damage?

It can, in rare cases. When decay reaches close to the pulp, the nerve may be too inflamed to recover even after the cavity is removed. This is called irreversible pulpitis and is treated with a root canal. Most fillings, however, heal uneventfully within two weeks.

Should I go back to the dentist if my filling hurts after a week?

If the pain is mild and getting better, give it a few more days. If it is the same as day one, getting worse, or waking you at night, call us. A quick bite check or X-ray takes the guesswork out and prevents small issues from turning into root canals.

Does throbbing after a filling mean I need a root canal?

Not usually. Most throbbing is a high bite or a temporarily inflamed nerve that calms down on its own. Root canals become necessary only when the pulp is irreversibly damaged, signaled by spontaneous pain, lingering cold sensitivity, or pain that intensifies over time.

Is it normal for a new filling to be sensitive to cold?

Yes. Brief cold sensitivity that disappears within a few seconds is normal for one to two weeks. What is not normal is cold pain that lingers thirty seconds or longer. That pattern points to irreversible pulpitis and should be evaluated promptly.

Still throbbing? Let's take a look.

If your filling is keeping you up at night, do not tough it out. A two-minute bite adjustment in our chair often ends days of pain. Call Line Dental Aloha at (503) 259-8641 and we will get you in. We see emergencies the same day whenever possible, and we are happy to answer questions in English or Korean.