Why Does My Crown Hurt? Causes and Next Steps

A crown is designed to make a damaged tooth feel strong, comfortable and natural again. So if you are asking, “why does my crown hurt?”, it can be worrying - especially if the tooth felt fine when the crown was first fitted. The reassuring news is that crown discomfort often has a clear cause, and a gentle dental assessment can usually identify the right way forward.

A dental crown itself cannot feel pain because it has no nerves. Pain usually comes from the tooth, gum, bite or surrounding tissues beneath and around it. Some causes are minor and settle quickly; others need prompt attention to protect the tooth and prevent a small issue becoming more complex.

Why does my crown hurt when I bite or chew?

Pain when biting is one of the most common reasons patients contact us after a crown. Sometimes the crown is sitting very slightly high in the bite. Even a tiny difference can mean that tooth takes more pressure than the others whenever you close your mouth or chew. It may feel as though the crowned tooth touches first, or you may notice a sharp, localised pain on certain foods.

This is often straightforward to resolve. Your dentist can check how your teeth meet using bite paper and make a small, precise adjustment where appropriate. Do not try to live with a high bite in the hope that it will wear down on its own. Continued excess pressure can irritate the ligament around the tooth and may contribute to cracking, sensitivity or jaw discomfort.

Pain on release of the bite can occasionally point to a crack in the tooth beneath the crown, or in a neighbouring tooth. Cracks can be difficult to see without a careful examination, so it is worth arranging an appointment rather than repeatedly testing the area by chewing on it.

Sensitivity after a new dental crown

It is not unusual for a newly crowned tooth to feel sensitive for a short period. The tooth may have been shaped, cleaned and prepared before the crown was placed, and its nerve can take time to settle. Mild sensitivity to cold, heat or pressure should gradually improve over days or a few weeks.

The amount of sensitivity varies. A tooth that had deep decay, a large old filling or previous trauma may be more reactive after treatment than a tooth that was otherwise healthy. If the nerve was already inflamed before the crown was fitted, the symptoms may also take longer to settle.

However, worsening pain is different from normal recovery. Contact your dentist if sensitivity becomes more intense, lingers after hot or cold drinks, wakes you at night, or does not show signs of improving. These can be signs that the nerve inside the tooth is not recovering as hoped and may need further treatment, such as root canal treatment, to retain the tooth and crown where possible.

The gum around the crown may be sore

Tender, swollen or bleeding gum around a crown is not always a problem with the crown itself. Plaque can collect around the crown edge, particularly if cleaning between teeth is difficult or the area is tender and has been avoided. This can cause local gum inflammation, making the tooth feel achy or sensitive when brushing.

The shape and fit of the crown also matter. A well-designed crown should sit comfortably against the gum and allow you to clean around it. If food repeatedly catches beside it, floss shreds or gets stuck, or there is an unpleasant taste or smell from the area, the crown margin should be checked. Occasionally, cement may have washed away or there may be a small gap where bacteria can enter.

Careful brushing at the gumline and daily cleaning between the teeth remain essential around crowns. Your dental team can show you the most effective technique for the position of your crown, whether that involves floss, interdental brushes or another suitable aid. Gentle care is better than avoiding the area altogether.

Decay or infection beneath a crown

A crown protects the visible part of a tooth, but it does not make the tooth immune to decay or infection. Bacteria can enter at the edge of a crown if there is leakage, damage or recurrent decay. In some cases, decay develops quietly and is only found during an examination or X-ray. In others, you may notice sensitivity, a dull ache, gum swelling or pain on biting.

Infection at the root of a tooth can also develop years after crown treatment. This may happen if the nerve was affected by old decay, a crack or previous dental work. It does not necessarily mean the crown was poorly made. Teeth have a complex history, and an old injury or deep filling can affect the nerve long after the original treatment.

Your dentist may use X-rays, clinical tests and a close examination of the crown and bite to work out what is happening. Treatment depends on the cause. Sometimes a crown can be preserved while root canal treatment is carried out; in other situations, replacement of the crown may be the most predictable option. The priority is always to restore comfort, function and long-term health with the least invasive suitable treatment.

Could the crown be loose, damaged or worn?

A loose crown can feel strange before it becomes painful. You may notice movement, a change in your bite, food trapping or sensitivity to air and drinks. Do not keep pushing it with your tongue or trying to stick it back with household glue. Adhesives not designed for dental use can damage the tooth and make professional treatment more difficult.

Crowns are durable, but they are not indestructible. Biting hard objects, grinding teeth, trauma and normal wear over many years can chip porcelain or affect the cement holding the crown in place. If you clench or grind, especially during sleep, your dentist may recommend a custom-made night guard to protect both your crown and natural teeth.

A damaged crown is not always an emergency, but it should be assessed promptly. A sharp edge can irritate the tongue or cheek, while an exposed tooth beneath the crown is more vulnerable to decay and fracture.

Pain may be coming from another tooth

Tooth pain can be surprisingly misleading. A problem in a nearby tooth, the opposing tooth or even the jaw joint can feel as though it is coming from the crowned tooth. Upper back teeth can also be affected by sinus pressure, while clenching may create a widespread ache that is difficult to pinpoint.

This is why an examination should look beyond the crown alone. A full assessment considers your bite, gums, neighbouring teeth, X-rays where needed and your symptoms over time. That broader approach helps avoid treating the wrong tooth and gives you a clearer, more confident plan.

What you can do before your appointment

If discomfort is mild, avoid chewing hard, sticky or very hot and cold foods on that side for a few days. Keep the area clean with a soft toothbrush and clean between the teeth gently. If you can take them safely, over-the-counter pain relief such as paracetamol or ibuprofen may help when used according to the instructions on the packet or advice from a pharmacist.

Avoid placing aspirin directly on the gum or tooth. It will not treat the cause and can burn the soft tissues. Equally, do not ignore recurring pain simply because pain relief temporarily masks it.

When crown pain needs urgent dental advice

Please seek urgent dental advice if you have facial swelling, a swollen gum that is getting larger, fever, difficulty swallowing or breathing, severe pain that is not controlled by pain relief, or a crown that has come off and leaves a sharp or badly broken tooth. These symptoms may indicate infection or a problem requiring prompt care.

If a crown has fallen out but you are comfortable, keep it safe and clean, and contact your dentist as soon as possible. It may be possible to re-cement it, depending on the crown and the condition of the tooth underneath. Try not to chew on the exposed tooth.

At Scarborough Dental & Implant Clinic, we know that a painful crown can quickly affect meals, sleep and confidence. A calm, thorough assessment can establish whether you need a simple bite adjustment, gum care, repair or more advanced restorative treatment. You do not need to guess or put up with discomfort - getting the tooth checked early gives you the best chance of protecting the natural tooth beneath and returning to a comfortable smile.