A dental crown that hurts under pressure usually means something is off with the fit, the tooth underneath, or the surrounding tissue. The pain might be sharp and instant when you bite down, or it might build as a dull ache after chewing. Either way, it’s your tooth telling you that pressure is landing somewhere it shouldn’t, or that something beneath the crown needs attention.
The Crown Sits Too High
This is the most common and most fixable reason for pressure pain. If the crown is even slightly too high, it contacts the opposing tooth before the rest of your teeth meet. That means every time you close your mouth or chew, one tooth absorbs force that should be spread across your whole bite. The ligament surrounding that tooth’s root becomes inflamed, and you feel it as soreness or a bruised sensation when you press down.
A high bite is especially common with new crowns. The numbness during your fitting appointment can make it hard to tell whether the crown feels right, and even a fraction of a millimeter matters. The fix is a simple bite adjustment where your dentist shaves down the high spot, usually in a single short visit. If your crown was placed recently and biting feels “off,” this is the first thing to rule out.
Decay Under the Crown
Crowns protect teeth, but they don’t make them immune to decay. Bacteria can work their way under the margin where the crown meets the tooth, especially if the seal has weakened over time. As decay eats into the tooth structure underneath, the inner layer of the tooth becomes exposed and sensitive. You’ll often notice that pressure triggers a sharper, more localized sting rather than the broad soreness of a bite problem.
Decay under a crown can’t be treated by drilling through the crown itself. In most cases the crown needs to come off, the decay needs to be removed, and a new crown gets placed. If enough tooth structure has been lost, you may need a root canal first.
Pulp Inflammation Inside the Tooth
The nerve tissue inside your tooth (the pulp) can become irritated from the original crown preparation, from decay creeping in, or from repeated trauma over time. This inflammation, called pulpitis, comes in two forms that feel quite different.
In the milder version, you’ll notice sensitivity to cold or sweet foods that fades within a few seconds. Tapping on the tooth doesn’t hurt. This type can calm down on its own once the irritant is removed. In the more serious version, sensitivity to heat, cold, or sweets lingers well beyond a few seconds. You may feel throbbing or aching that shows up without any trigger at all, and tapping on the tooth produces a distinct jolt of pain. This version typically means the nerve won’t recover, and a root canal becomes necessary to resolve the pain.
A Crack in the Tooth or Root
A crack can develop in the tooth underneath a crown, or even in the root, without any visible sign on the crown itself. What makes crack pain distinctive is its behavior: you feel a sharp stab when you bite down, and sometimes an equally sharp pain when you release the bite. That’s because the cracked pieces flex apart under pressure, pulling on the fluid inside the tooth’s microscopic inner tubes and firing off pain signals.
Cracks that stay in the upper portion of the tooth can sometimes be managed with a new crown or other restoration. Vertical root fractures, which start in the root and run lengthwise, are harder to save. These fractures often produce vague, intermittent symptoms that come and go for weeks before becoming constant, which makes them tricky to diagnose early. Your dentist may use a bite stick (asking you to bite on a small plastic instrument tooth by tooth) to isolate exactly which tooth and which part of the tooth reproduces the pain.
Infection or Abscess
If bacteria reach the pulp or the tissue around the root tip, an infection can develop. A tooth abscess produces pressure pain, but it also tends to come with other hard-to-miss symptoms: severe throbbing that radiates into your jaw, neck, or ear; swelling in your face or cheek; tender lymph nodes under your jaw; fever; or a foul taste in your mouth. You might also notice that the gum near the tooth looks puffy or has a small bump that occasionally drains.
An abscess won’t resolve on its own. If you develop a fever along with facial swelling, or if you have difficulty breathing or swallowing, that’s a sign the infection may be spreading beyond the tooth, and you should get to an emergency room rather than waiting for a dental appointment.
Failed or Incomplete Root Canal
If your crowned tooth already had a root canal, pressure pain can signal that the treatment didn’t fully resolve the problem. A missed nerve canal, a tiny crack that wasn’t visible at the time, or reinfection of the root can all produce symptoms months or even years later. The telltale signs include tenderness when pressing on the tooth, pain when tapping on it, sensitivity to heat or cold that shouldn’t exist in a tooth with no nerve, and sometimes swelling or discoloration of the tooth.
Persistent pain that gradually worsens, or pain that comes on for no apparent reason in a previously treated tooth, is worth investigating. Retreatment of the root canal or a minor surgical procedure to address the root tip are the usual paths forward.
What Your Dentist Will Check
Diagnosing the source of crown pain involves a few straightforward tests. Your dentist will likely tap on the tooth with a small instrument to check for tenderness, which signals inflammation around the root. They’ll apply a cold stimulus to see whether the nerve inside responds, and if so, how quickly the sensation fades. A lingering response (more than a few seconds) points toward nerve damage that won’t reverse on its own. They’ll also check your bite with thin colored paper to see whether the crown is hitting before the rest of your teeth, and take X-rays to look for decay, bone loss, or signs of infection at the root tip.
Cracks are the hardest to catch because they don’t always show up on X-rays. A bite stick test, where you bite down on individual cusps one at a time, can help reproduce the exact pain pattern and narrow down the location of a fracture.
Simple Fix vs. Bigger Problem
The range of outcomes is wide. A bite adjustment takes minutes, costs little, and provides near-immediate relief. At the other end, a cracked root or a failed root canal might mean retreatment, a surgical procedure, or extraction. Most cases fall somewhere in between. A crown that needs to be removed and replaced due to decay is a more involved appointment but is routine dental work with predictable results.
Timing matters. Pressure pain that shows up right after a crown is placed is often a bite issue and resolves easily. Pain that develops gradually in a crown you’ve had for years is more likely to involve decay, a crack, or nerve problems. And pain that arrives suddenly with swelling or fever needs prompt attention regardless of how long you’ve had the crown.