Tooth Pain Under a Crown: Causes & What to Do
Find out why a crowned tooth can still hurt — and how it is usually fixed without removing the crown.
Tooth pain under a crown surprises many patients, but it has a simple explanation: the crown only covers the tooth. Your natural tooth — and in many cases its living nerve — is still there underneath, and it can become inflamed, decayed or cracked just like any other tooth.
Here is the direct answer: tooth pain under a crown is most often caused by an inflamed or dying nerve that needs a root canal, new decay creeping in at the crown margin, a crown that sits too high in the bite, receding gums that expose the root, night-time grinding, or — less commonly — a cracked root. Almost all of these problems are treatable, and in many cases the crown itself can stay in place. Below, the dentists at EsteGo Clinic in Istanbul explain each cause, how we diagnose it and what actually helps.
Why Does Tooth Pain Under a Crown Happen?
The single most common reason for tooth pain under a crown is trouble with the nerve (pulp) inside the tooth. Teeth that receive crowns have usually already been through deep decay, large fillings or heavy drilling, and a stressed nerve can become inflamed months or even years later. When the pulp is inflamed or slowly dying, you typically feel lingering pain after hot or cold, spontaneous aching, or throbbing that wakes you at night — clear signs that a root canal is needed.
Ranked after nerve problems, the other frequent causes are: new decay at the crown margin, where the crown edge meets the tooth and bacteria can leak underneath; a poorly fitting or high crown that takes too much force every time you bite; gum recession that exposes the sensitive root surface next to the crown, which behaves much like general tooth sensitivity; bruxism (clenching and grinding) that overloads the tooth; and finally a cracked tooth or fractured root, which is the least common but most serious cause.
How Dentists Find the Exact Cause
Because the crown hides the tooth, careful testing matters more than guesswork. A dental X-ray shows infection at the root tip, decay at the margins and the quality of any previous root canal. A percussion test — gentle tapping on the tooth — reveals inflammation around the root, while a cold test checks whether the nerve is healthy, hypersensitive or already dead. We also mark the bite with articulating paper to see whether the crown hits too early when you close.
This step-by-step diagnosis is standard good practice, and you can read more about crowned teeth and pulp health in the American Dental Association patient resources. The key point: pain under a crown never gets investigated properly without an X-ray, so an online guess is no substitute for an examination.
Treatment: What Actually Helps
Treatment always targets the cause, not just the symptom. If the crown sits too high, a simple bite adjustment — polishing fractions of a millimetre off the surface — can end tooth pain under a crown within days. If the nerve is inflamed or infected, the good news is that a root canal treatment can very often be performed straight through the crown: a small access hole is drilled, the canals are cleaned and sealed, and the hole is filled. In many cases the crown does not need to be removed at all.
When the X-ray shows leaking margins or decay under the crown, patching is not enough — the old crown is removed, the decay is cleaned out and a precisely fitting new restoration is made. Modern zirconium crowns with digitally designed margins seal far better than older metal-based crowns. If the tooth is heavily damaged, we also discuss whether a crown is still the right choice — our veneers vs crowns guide explains the difference. Only a vertically cracked root cannot be saved; that tooth is extracted and replaced with an implant.
Not sure why your crowned tooth hurts?
Send us a photo or a recent X-ray and our dentists will assess it free of charge, usually within 24 hours.
💬 Get a Free Assessment on WhatsApp
When Is Tooth Pain Under a Crown an Emergency?
See a dentist urgently — within 24 hours — if the pain comes with swelling of the gum, cheek or face, fever, a bad taste from a draining abscess, or intense throbbing that keeps you awake at night. These are signs of an active infection that can spread and will not settle on its own. Mild tooth pain under a crown that appears only when biting can wait a few days for a normal appointment, but it should never be ignored for weeks, because a treatable nerve problem can turn into an abscess and bone loss.
Prevention is mostly about quality: a crown with precise, tightly sealed margins, a correctly adjusted bite and healthy gums rarely causes trouble. That is why we design every crown digitally, check the fit under magnification and verify the bite before you leave the clinic — and why we recommend a night guard for patients who grind.
Fixing a Painful Crown: Turkey vs UK & US Costs
Diagnosing and treating tooth pain under a crown is significantly more affordable in Turkey. A molar root canal plus a new zirconium crown typically costs around 300–500 EUR in total at EsteGo Clinic, compared with roughly 1,500–2,500 GBP in the UK or 2,500–4,000 USD in the US for the same combination. The materials — German and Swiss brand ceramics and files — are the same; the difference is local cost structure, not quality.
EsteGo Clinic is located in Mecidiyeköy, Şişli, in the heart of Istanbul. With 15+ years of experience and more than 40,000 treated patients from 47+ countries, our dental team handles crown complications every week — from simple bite adjustments to full root canal retreatment and crown renewal, usually completed within a few days of your visit.
Frequently Asked Questions
Get your free dental assessment
Send photos for a personalised plan and quote — no obligation.
Get a Free Hair Analysis
Talk to our specialist for personalized planning and pricing.