Pain only when you bite is a useful clue. It points to a handful of causes, from a filling that sits slightly high to a crack or a root infection, and simple tests tell them apart.
Note which side hurts and whether it is on biting or on letting go.
A tooth that hurts when you bite down is most often caused by a filling or crown that sits slightly high, a crack in the tooth, decay under a filling, an inflamed ligament from clenching, or an infection at the root tip. Upper back teeth can also ache on biting during a sinus infection. At Creative Arts in Dubai, the dentist finds the cause with bite and cold tests and an X-ray before suggesting treatment.
Who treats you here Dr. Marina Antoniuk Dentist · Dr. Julia General Dentist
Every dentist’s licence can be checked on the DHA Sheryan medical directory.
The pattern of the pain narrows it down. Only an examination confirms it.
| Cause | Typical clues | What usually helps |
|---|---|---|
| Filling or crown sitting slightly high | Started within days of new dental work; the tooth meets its opponent first when you close | A quick adjustment of the high spot |
| Cracked tooth | Sharp, brief pain when chewing something firm, often worse when you release the bite; hard to say which tooth | A crown or bonded restoration to hold it together; root canal if the nerve is affected |
| Decay or a leaking filling | Pain on biting plus sensitivity to sweet or cold; a dark edge or a gap around an old filling | Removing the decay and placing a new filling |
| Clenching or grinding | Several teeth tender, worse in the morning, tired jaw muscles, flattened or chipped edges | Reducing the load, often with a custom night guard |
| Infection at the root tip | A dull, deep ache when pressing or tapping; the tooth may feel slightly raised; sometimes a gum swelling | Root canal treatment, or extraction if the tooth cannot be saved |
| Gum problem or trapped food | Tender gum between two teeth, food packing in a gap, bleeding when flossing | Cleaning, treating the gum pocket or closing the food trap |
| Sinus infection (upper back teeth) | Several upper back teeth ache together, worse when bending forward, during or after a cold | Treating the sinus with your doctor once a dental cause is excluded |
Pain after a root canal or a new crown has its own normal pattern; see pain after a new crown and sensitivity after a filling.
Describing exactly when it hurts is the most useful thing you can bring.
A short, sharp jolt when you let go after biting something firm is a classic sign of a cracked tooth: the pieces flex apart under load and snap back. The American Association of Endodontists describes this erratic chewing pain.
A deep, bruised feeling when you bite or tap the tooth, which can linger, usually comes from the ligament around the root. Inflammation or infection at the root tip and heavy clenching are the usual reasons.
If the pain began within days of a filling or crown, a slightly high contact is the first thing to check. It is quick to correct, and the soreness usually settles within days afterwards.
If the tooth also throbs on its own, wakes you at night or aches long after cold, the nerve itself is likely inflamed. That changes the treatment discussion, often towards root canal treatment.
Bite pain is often hard to place: many people point to the wrong tooth, or to the upper jaw when the problem is in the lower. The examination works through simple tests, one tooth at a time:
Where a 3D CBCT scan would answer a specific question, for example a suspected root fracture, it may be suggested; it is not routine. For a detailed look at cracks, our cracked tooth page explains the different kinds and which can be saved.
Treatment follows the cause. Many cases need only the first one or two rows.
| Option | When it fits | What to expect |
|---|---|---|
| Bite adjustment | A filling or crown that sits high | A few minutes of polishing the high spot, usually without anaesthetic |
| New filling | Decay, a broken or leaking filling | Under local anaesthetic, decay removed and the tooth rebuilt in tooth-coloured material; see fillings |
| Night guard | Clenching or grinding overloading the teeth | A custom-made guard worn at night to spread and cushion the forces; see night guards |
| Crown | A cracked tooth with a healthy nerve, or a heavily filled tooth | The tooth is prepared and covered so the pieces cannot flex apart; see dental crowns |
| Root canal treatment | An inflamed or infected nerve, or infection at the root tip | The nerve space is cleaned and sealed, usually in one or two visits, then the tooth is protected |
| Extraction and replacement | A crack running down into the root, or a tooth that cannot be restored | The tooth is removed and the gap discussed: implant, bridge or leaving it |
Your dentist explains the options, including what happens if you wait, before treatment starts.
Book promptly if a tooth hurts on biting and also throbs on its own, wakes you at night, or the gum next to it swells; delaying can allow an infection to spread. Go to a hospital emergency department straight away for facial swelling with fever, difficulty breathing or swallowing, swelling spreading towards the eye or neck, uncontrolled bleeding, or a head or face injury. Creative Arts is open daily from 10:00 to 20:00 and is not a 24-hour clinic.
Chew on the other side and avoid hard, crunchy or very chewy food, such as nuts, ice, hard bread crusts and toffee, which flex a cracked tooth and load an inflamed one. If you clench during the day, notice it and let your teeth rest apart. Over-the-counter pain relief taken as directed on the label usually controls the discomfort; ask a pharmacist which suits you if you take other medicines.
Do not wait for bite pain to fade on its own. A crack can spread, and an infection can continue even after the pain stops; our guide on why a toothache that stopped suddenly still needs checking explains why. For general measures to get through a painful night, see toothache relief at home.
Dr. Marina Antoniuk and Dr. Julia focus on restorative and microscopic dentistry, including root canal treatment.
Clinical statements on this page are consistent with these independent sources. They describe averages from studies, not a promise for any one patient.
Pain only on biting usually means something reacts to pressure rather than to temperature: a high filling or crown, a crack that flexes under load, an inflamed ligament from clenching, or inflammation at the root tip. The nerve itself may still be healthy. An examination with bite and tapping tests and an X-ray separates these causes.
Mild tenderness for a few days can be normal, especially after a deep filling. Pain on biting that does not improve within a few days often means the filling sits slightly high and touches first when you close. Adjusting it takes a few minutes. Pain that lingers after cold or wakes you at night needs a further check of the nerve.
A crack typically causes a sharp, brief pain when you chew something firm, often when you release the bite, and sometimes sensitivity to cold. It may be hard to tell which tooth hurts. A bite test on each cusp, tapping and magnification help confirm it. Cracks often do not show on X-rays, so the clinical tests matter.
Yes. The roots of the upper back teeth sit close to the floor of the sinus, so sinus inflammation can make several upper back teeth ache or feel tender on biting, often worse when bending forward. If only one tooth hurts, or the pain persists after the cold clears, a dental cause should be checked first.
No. Many causes of bite pain are fixed with a bite adjustment, a new filling, a crown or a night guard. Root canal treatment is needed when the nerve is irreversibly inflamed or has died, or there is infection at the root tip. Tests of the nerve and an X-ray show which applies to your tooth.
Yes. Heavy clenching or night grinding can bruise the ligaments around the roots, so several teeth feel tender on biting, often worst in the morning, with tired jaw muscles. Reducing the load usually helps, and a custom night guard can protect the teeth. The examination also checks for cracks caused by the extra force.
Creative Arts has a single clinic on Jumeira Street (Jumeirah Beach Road). Ask about parking when you book.
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