Types of tooth pain and what they mean

Reviewed by Dr. Samar Fadavi, DDS

Short answer: The kind of tooth pain you feel is a useful clue. Brief sensitivity to cold often points to exposed roots or worn enamel. Pain that lingers after hot or cold, throbs, or wakes you at night can mean an inflamed or infected nerve. Sharp pain on biting suggests a crack or a loose filling. Pain with swelling or fever needs same-day care.

What do different types of tooth pain mean?

Tooth pain is one of the most common reasons people call a dental office, and it comes in many forms: a quick zing from ice cream, a dull ache after a long day, a sharp jolt when biting, or a deep throb that keeps you awake. Each type tends to point to a different cause, and some are far more urgent than others. Knowing what your pain is telling you helps you decide how quickly to be seen and what to mention when you call.

This guide describes the most common types of tooth pain, what they usually mean, what you can do in the meantime, and when to seek care. It is general information, not a diagnosis. Only an exam, often with X-rays, can confirm the cause.

How a tooth feels pain

Each tooth has a hard outer layer of enamel, a softer layer underneath called dentin, and a central space containing the pulp, made of nerves and blood vessels. Dentin contains thousands of tiny tubes that lead toward the pulp. When enamel wears away or gums recede, these tubes are exposed, and changes in temperature or pressure move the fluid inside them, which the nerve senses as sharp pain. When the pulp itself is inflamed or infected, the pain changes character: it lasts longer, throbs and can spread.

Pain can also come from structures around the tooth: the gum, the ligament that holds the tooth in its socket, the bone, the jaw joint, the muscles, and even the sinuses. That is why tooth pain is sometimes felt in a different place from where the problem is.

Common types of tooth pain

A quick, sharp zing with cold, sweet or air

What it often means: sensitive dentin, usually from gum recession, worn enamel at the gumline, brushing too hard, acidic food and drink, or a recent cleaning or whitening. A small cavity can also cause this.

The pattern: pain starts with the trigger and fades within a few seconds once it is removed.

What helps: a toothpaste for sensitive teeth used twice a day for a few weeks, a soft brush, gentle technique, and limiting acidic drinks. If it does not improve, have it checked for decay.

Pain that lingers after hot or cold

What it often means: the pulp is inflamed, often from deep decay, a large or leaking filling, a crack, or recent dental work. When pain lingers for more than about 30 seconds after the trigger is gone, the nerve may be irritated beyond the point where it can recover on its own.

What helps: avoid the trigger and book an exam soon. Treatment may be a new filling, or root canal treatment if the nerve is badly inflamed.

Throbbing pain that comes on by itself or wakes you at night

What it often means: significant pulp inflammation or infection. Pain often gets worse when lying down because blood flow to the head increases.

What helps: over-the-counter pain relief as directed, sleeping with your head raised, and a prompt appointment. This kind of pain rarely settles for good on its own, even if it eases for a while. Our root canal treatment page explains how an infected nerve is treated.

Sharp pain when biting or releasing a bite

What it often means: a cracked tooth, a loose or high filling, or decay under a filling. Pain when you release the bite, rather than when you bite down, is a classic sign of a crack.

What helps: chew on the other side and avoid hard or sticky foods. Book an exam; cracks can grow, and early treatment such as a crown may protect the tooth.

A dull, constant ache with tenderness to touch

What it often means: inflammation of the ligament around the root, from an infection at the root tip, a recent filling that is slightly high, food packed between teeth, or clenching and grinding.

What helps: clean carefully between the teeth to remove trapped food, and book an exam if it lasts more than a day or two.

Pain with swelling, a bump on the gum or a bad taste

What it often means: a dental abscess, a pocket of infection at the root tip or in the gum. A pimple-like bump that releases fluid with a salty or bad taste is the infection draining.

What helps: same-day care. Infections do not resolve without treatment of the cause, and swelling can spread. Our same-day emergency care page explains how to reach us.

Pain in several upper back teeth with a stuffy nose

What it often means: sinus congestion. The roots of the upper back teeth sit close to the sinus, so sinus pressure can feel like toothache, often in several teeth at once and worse when bending forward.

What helps: treatment of the sinus problem, usually with advice from your pharmacist or doctor. If the pain stays once the cold clears, have the teeth checked.

Aching in the jaw, temples or teeth in the morning

What it often means: clenching or grinding during sleep, or jaw joint strain. Teeth may feel sore, and the jaw may click or feel tired.

What helps: a custom night guard, jaw relaxation and attention to stress. Our night guards and TMJ page explains the options.

Pain at the very back of the mouth

What it often means: a wisdom tooth coming through, with an inflamed gum flap over it. Our guide to wisdom teeth explains the signs.

Pain after a filling, crown or cleaning

What it often means: mild sensitivity after dental work is common and usually fades over a few days to two weeks. Pain when biting after a new filling often means it sits slightly high and needs a quick adjustment.

Pain after an injury

What it often means: a bruised ligament, a crack, a loose tooth or damage to the nerve. A tooth that darkens weeks after a knock may have a damaged nerve. Injured teeth should be checked promptly, especially if a tooth is loose, pushed out of place or knocked out.

What you can do while you wait for an appointment

1. Use pain relief as directed. Over-the-counter pain relievers can help. Follow the package directions and check with a pharmacist if you take other medications or have health conditions.
2. Rinse with warm salt water. Half a teaspoon of salt in a cup of warm water helps keep the area clean.
3. Floss gently around the tooth. Trapped food is a surprisingly common cause of pain.
4. Use a cold pack on the cheek for 15 minutes at a time if there is swelling.
5. Avoid the triggers. Very hot, cold, sweet or hard foods.
6. Chew on the other side.
7. Sleep with your head raised if throbbing pain is worse at night.
8. Write down the details. When it started, what sets it off, how long it lasts and anything that helps. This helps the dentist find the cause quickly.

What to avoid

• Placing aspirin or a tablet on the gum. It can burn the tissue.
• Applying heat to a swollen face. Heat can draw infection outward. Use cold instead.
• Taking more pain medication than directed. Too much can harm the liver, kidneys or stomach.
• Using leftover antibiotics. They may be the wrong type and do not treat the cause.
• Waiting because the pain stopped. A nerve that dies can stop hurting while infection continues. Pain that disappears suddenly after days of throbbing should still be checked.
• Popping a gum bump. Leave it alone and book a visit.

How the cause is found at the clinic

The dentist asks about your symptoms, looks at the tooth and gums, and may tap gently on teeth, test how they respond to cold, check your bite on a small stick to look for cracks, and take X-rays. In some cases, 3D CBCT imaging gives a clearer view of the roots and bone. Once the cause is known, you will be told the options, which may include a filling, a crown, root canal treatment, gum treatment, an extraction, a night guard, or simply watching the area.

Keeping a simple tooth pain diary

Tooth pain is often hard to describe once you are in the chair, especially if it comes and goes. A short diary over a day or two gives the dentist useful clues. Note when the pain starts, how long it lasts, and what sets it off: cold drinks, hot food, sweets, biting down, lying flat or nothing at all. Rate it from one to ten. Note whether it is sharp or dull, whether it throbs, and whether you can point to one tooth or the whole side of your face aches. Write down any pain relievers you took and whether they helped. Bring the notes to your visit.

These details help tell apart sensitivity from exposed roots, a cracked tooth that hurts only when you release your bite, an irritated nerve that lingers after cold, and an infection that throbs on its own. They also help the dentist decide which tests and X-rays to use.

Tooth pain at night and on weekends

Pain often feels worse at night because there are fewer distractions and lying down can increase pressure in an inflamed tooth. Propping your head up with an extra pillow may help. Avoid very hot, very cold or sugary food and drink on that side. Rinse gently with warm salt water, and use pain relievers only as directed on the package or by your pharmacist. Do not place aspirin or any tablet against the gum, which can burn the tissue.

Go to a hospital emergency department right away if swelling spreads to your eye, neck or floor of the mouth, or if you have trouble swallowing or breathing, or a high fever. For other urgent pain, Dental Care For You is open evenings on most weekdays and on Saturdays, and offers same-day emergency visits. You do not need to be an existing patient.

When to see a dentist

Same day:

• Swelling of the face, jaw or gum.
• Fever with tooth pain.
• Severe pain that pain relievers do not control.
• A knocked-out, loose or displaced tooth after an injury.
• A bad taste with a gum bump that drains.

Within a few days:

• Pain that lingers after hot or cold.
• Pain when biting.
• A broken tooth or lost filling.
• Sensitivity that does not improve after two weeks with a sensitive toothpaste.

Go to the nearest emergency department or call 911 if swelling affects your breathing, swallowing or vision.

Questions about tooth pain

Why does my tooth hurt more at night?

Lying down increases blood pressure in the head, which can make an inflamed nerve throb. There are also fewer distractions. Night pain often means the nerve needs attention.

Can a tooth hurt without a cavity?

Yes. Cracks, gum recession, grinding, sinus pressure, a high filling or trapped food can all cause pain without decay.

My tooth stopped hurting. Do I still need to come in?

Often, yes. When a nerve dies, pain can stop while infection develops. Have it checked.

Is sensitivity to cold serious?

Brief sensitivity that fades within seconds is common and often managed with a sensitive toothpaste. Sensitivity that lingers, or comes with other pain, should be checked.

Why does a tooth hurt after a filling?

Mild sensitivity for a few days is common. Pain on biting usually means the filling needs a small adjustment. Pain that worsens or lasts beyond two weeks should be checked.

Can stress cause tooth pain?

Stress often leads to clenching and grinding, which can make teeth, jaw muscles and joints ache.

Do I need to be a patient to get an emergency visit?

No. We offer same-day emergency visits, and you do not need to be an existing patient.

Related guides

• Cracked tooth: symptoms and treatment
• Dental abscess: signs and what to do
• Sensitive teeth: causes and fixes