Toothache: What Causes It, What Helps and When to Get Seen

1 week ago

A toothache happens when a tooth or the tissues around it become irritated, inflamed or infected. Common causes include cavities, cracked teeth, exposed root surfaces, gum problems and dental abscesses. Pain medicine and gentle care at home can ease discomfort for a while, but they don’t fix the cause. A persistent toothache requires a dental assessment, and some symptoms require urgent care.

This guide from Marsfield Dental Care explains what causes a toothache, how to ease it safely, and how to tell routine, urgent and emergency symptoms apart.

Situation	What to do
Mild, brief sensitivity with no other symptoms	Book a dental check if it keeps happening
Toothache that persists or worsens	Contact a dentist promptly
Severe pain affecting sleep or daily life	Seek an urgent dental appointment
Facial swelling, fever or a suspected abscess	Arrange an urgent dental assessment for that day
Rapidly spreading swelling or trouble opening your mouth	Seek urgent medical or dental care
Difficulty breathing or swallowing, or swelling near the throat or eye	Call 000 or go to an emergency department

The Australian Government’s healthdirect guide to toothache and gum swelling advises seeing a dentist as soon as possible if the toothache lasts more than 2 days or doesn’t improve with pain relief. Don’t wait 2 days if symptoms are severe.

What are the most common causes of a toothache?

Toothache is most often caused by tooth decay, a cracked or damaged tooth, an inflamed or infected tooth nerve (pulp), or problems with the gums and tissues that support the teeth. Wisdom teeth, grinding and sinus problems can also cause pain that feels like a toothache. Because these causes can feel similar, a dental examination is needed to confirm which one is responsible.

Tooth decay. Bacteria in plaque make acids that wear through enamel. Once a cavity reaches the softer dentine beneath, hot, cold or sweet foods may trigger pain. Deeper decay can reach the pulp, the soft centre of the tooth that holds nerves and blood vessels.

Pulp inflammation and infection. Deep decay or injury can inflame the pulp. Some inflammation settles once the cause is treated, while other cases need root canal treatment or extraction. Infection can spread into the tissues around the root, forming an abscess. Pain sometimes fades even though the problem remains.

Cracked or damaged teeth. Cracks from injury or biting forces, or a broken filling, can cause sharp pain when chewing, especially as you release your bite. Temperature sensitivity is also common.

Gum problems. Inflamed or infected gums, food packed between teeth and gum recession that exposes root surfaces can all cause pain.

Other sources. Wisdom teeth coming through, tooth grinding, sinus problems and pain referred from elsewhere can feel like a toothache. Healthdirect notes that ear pain can sometimes feel like a toothache, so seek medical advice if you’re unsure, especially if you’re experiencing chest discomfort or breathlessness.

How can you tell if a toothache is caused by decay, infection or gum problems?

Some symptoms point more towards decay, infection or gum problems, but pain patterns alone can’t confirm the cause. Early decay often causes no pain, some infected teeth hurt very little, and a cracked tooth can mimic a nerve problem. The table below shows common patterns. A dentist confirms the cause by examining the tooth, testing it and taking X-rays where needed.

Symptom	Possible causes	What it means
Brief sensitivity to cold or sweet	Exposed dentine, early decay or a worn filling	Not diagnostic on its own
Pain that lingers after a hot or cold	Possible pulp inflammation	Needs pulp testing
Pain when biting or releasing	Crack, infection or a high filling	Several explanations
Bleeding, red or tender gums	Gum inflammation	It can occur without a toothache
Swelling, gum bump, discharge or bad taste	Possible abscess	Needs prompt care
Pain that wakes you at night	Possible pulp involvement	Not always an infection
Pain that suddenly stops	Change in the pulp	Doesn’t mean it has healed

How dentists find the cause. A dentist may examine the teeth and gums, test how the tooth responds to cold, tap, or biting, measure the gums, and take X-rays. Avoid deciding for yourself whether you need antibiotics, a root canal or an extraction. If hot food triggers your pain, our article on why eating hot food can make a tooth hurt explains what that can mean.

What are the safest ways to relieve a toothache at home?

Some home measures can ease a toothache temporarily while you arrange a dental appointment. Suitable over-the-counter pain relief, a warm salt water rinse, a cold compress wrapped in a towel, soft foods, and resting with your head raised may all help. None of them treats cavities, pulp infections, abscesses, or broken teeth, so the cause still needs to be assessed.

Over-the-counter pain relief. Healthdirect notes that paracetamol or ibuprofen may help. Follow the packet instructions and ask a pharmacist or doctor if you’re unsure. Ibuprofen doesn’t suit everyone, including some people who are pregnant, have kidney problems or stomach ulcers, or take blood thinners. Check combination products to avoid double-dipping on ingredients.

Salt water rinse. Adults can gently rinse with warm salt water and spit it out without swallowing. It may soothe the area, but it won’t clear an infection. Don’t give rinses to young children who might swallow them.

Cold compress. Wrap a cold pack in a cloth and hold it against your cheek. Don’t place ice directly on the skin.

Food, cleaning and rest. Eat soft foods and chew on the other side. Avoid very hot, cold or sweet foods that trigger pain. Keep brushing gently with a soft brush and fluoride toothpaste. Healthdirect also suggests resting with your head propped up, as lying flat can make dental pain feel worse.

What to avoid

Placing aspirin directly on the gum or tooth.
Applying undiluted essential oils or harsh chemicals.
Trying to drain an abscess yourself.
Taking leftover or someone else’s antibiotics.
Relying on home care when warning signs appear.

When should you see a dentist for a toothache?

See a dentist for any toothache that lasts more than a couple of days, keeps coming back or gets worse. Severe pain, swelling, fever or other signs of infection need urgent dental care the same day. Difficulty breathing or swallowing, or swelling near the eye or neck, is a medical emergency, so call 000 or go to an emergency department.

Book a dental appointment for recurring sensitivity, ongoing pain, pain when chewing, a lost filling, a cracked or broken tooth, or bleeding gums.

Seek urgent dental care for severe pain affecting sleep, pain not controlled by suitable medicine, gum or facial swelling, fever with a suspected infection, pus or a bad taste, worsening pain after dental work, or trouble opening your mouth. Healthdirect lists a fever over 38°C, trouble swallowing and swelling in the cheek or jaw as reasons to see a dentist promptly.

Call 000 or go to an emergency department for difficulty breathing, swallowing, or speaking; swelling around the eye or neck; rapidly spreading swelling; or feeling very unwell with an infection.

Symptoms	Level of care	Action
Mild, occasional sensitivity	Routine	Book an appointment
Persistent or recurring pain	Prompt	Contact a dentist
Severe pain affecting sleep	Urgent dental	Earliest available appointment
Facial swelling or fever	Urgent	Contact a dentist that day
Spreading swelling or feeling unwell	Urgent medical	Seek immediate care
Breathing or swallowing difficulty	Emergency	Call 000

Toothache at night or outside opening hours. If you have no emergency signs, use suitable pain relief and the home measures above, then arrange dental care as soon as you can. Marsfield Dental Care offers same-day appointments when available during opening hours, but it is not an after-hours service. Outside hours, call Healthdirect on 1800 022 222 for advice, or go to your nearest hospital emergency department. Our guide to tooth pain after hours explains when the hospital is the right choice, and our dental emergency page covers urgent appointments. For other urgent problems, see what counts as a dental emergency.

What dental treatments are available for a persistent toothache?

Treatment for a persistent toothache depends on the cause found at examination. Options include a filling for decay, repair of a broken filling, gum treatment, root canal treatment for an inflamed or infected nerve, or extraction when a tooth can’t be predictably restored. Not every painful tooth needs a root canal or removal, and antibiotics alone don’t fix the tooth.

Examination and diagnosis. Your dentist reviews your symptoms and health, examines the teeth and gums, tests sensitivity and biting, checks existing fillings and takes X-rays where needed, then explains the options and risks. Our dental pain relief page explains how the practice approaches tooth pain.

Fillings and restorations. Cavities or damaged fillings may be repaired with dental fillings if enough healthy tooth remains.

Root canal treatment. If the pulp is permanently inflamed or infected, root canal treatment removes it, cleans and seals the canals, and the tooth is then restored.

Gum treatment. Gum inflammation or infection may need professional cleaning or further gum care.

Extraction. When a tooth can’t be predictably restored, tooth extraction may be advised, along with a discussion of replacement options.

Antibiotics. Healthdirect notes that antibiotics are usually not used for a toothache unless there is a clear infection. Even then, they don’t replace treating the tooth. Whether they’re needed depends on clinical findings, such as spreading infection or feeling unwell.

How can you prevent a toothache?

Many causes of toothache can be reduced with twice-daily brushing with fluoride toothpaste, daily cleaning between teeth, fewer sugary foods and drinks, and regular dental check-ups that pick up decay and gum problems early. Good habits lower the risk but can’t prevent every problem or injury, so new or persistent pain still needs to be checked.

Brush twice a day with fluoride toothpaste and a soft brush, without scrubbing hard.
Clean between your teeth daily.
Cut down how often you have sugary foods and drinks, limit acidic drinks and choose water often.
Wear a mouthguard for contact sports and have grinding checked.
Have broken fillings repaired promptly.
Attend check-ups at the intervals your dentist recommends. Our preventative dentistry page explains these visits.

Getting the toothache sorted

Toothache is a symptom, not a diagnosis. Short-term relief can help you get through it, but the cause requires a dental assessment, and swelling or breathing problems require urgent care.

Experiencing a toothache? Arrange a Dental Assessment

Toothache has many causes, and the right treatment depends on an accurate diagnosis. If you have ongoing sensitivity, tooth pain or discomfort when biting, arrange an assessment at Marsfield Dental Care to discuss your symptoms and options. If you have serious swelling or trouble breathing or swallowing, seek emergency medical care.

[Button] Book a Toothache Assessment → https://marsfielddentalcare.com.au/contact-us/

Frequently asked questions

Can a toothache go away on its own?

Mild, temporary sensitivity sometimes settles, but a cavity, infection or crack usually remains even if the pain eases. Pain stopping suddenly can mean the nerve inside the tooth has died, not that the tooth has healed. An untreated infection can spread or flare up later, so have a recurring or persistent toothache checked by a dentist even if it has quietened down.

Why does my toothache get worse at night?

A toothache often feels worse at night because lying flat can increase pressure around an inflamed tooth, and there are fewer distractions. Night pain can point to pulp inflammation, although it isn’t always infection. Resting with your head propped up and taking suitable pain relief may help. Arrange a dental appointment for the next day, and seek urgent care for swelling or fever.

Can a sinus infection cause a toothache?

Yes. The roots of the upper back teeth sit close to the sinuses, so sinus congestion can cause aching in several upper teeth at once, often worse when bending forward. Because a dental problem can feel the same, it’s worth having a dentist check the teeth if the pain persists after the sinus symptoms settle or is focused on one tooth.

Should I take antibiotics for a toothache?

Not unless a dentist or doctor prescribes them. Antibiotics are usually not used for a toothache unless there is a clear, spreading infection, and even then, they don’t remove the cause inside the tooth. Never take leftover or someone else’s antibiotics. The source of the problem, such as decay or an infected nerve, still needs dental treatment.

Is it safe to wait until my next check-up?

Only if the symptom is mild, a brief sensitivity that comes and goes. A toothache that lasts more than a couple of days, keeps returning, or wakes you at night should be seen sooner. Swelling, fever, pus or trouble opening your mouth need urgent dental care, and difficulty breathing or swallowing needs emergency care straight away.

Can a cracked tooth cause pain without a visible crack?

Yes. Many cracks are too fine to see and may not show on an X-ray. A typical sign is a sharp pain when biting, especially on release, sometimes with sensitivity to cold. Your dentist may use bite tests, a light or magnification to find it. Early assessment matters because cracks can spread over time.

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