Overview
Tooth pain ranges from brief sensitivity to severe throbbing pain. The most common tooth pain causes include decay (cavities), inflamed or infected pulp (pulpitis/abscess), cracked teeth, gum disease, exposed roots, bite problems and referred pain (such as sinus issues or jaw muscle tension).
Because different problems can feel similar, the right next step is a dental assessment that confirms the cause and matches treatment to your goals for comfort, longevity and cost.
Quick answer: what usually causes tooth pain?
- Sharp pain on biting: often a cracked tooth or high filling
- Lingering pain to hot/cold: likely inflamed nerve (irreversible pulpitis)
- Short zing to cold/sweets/air: exposed dentine or recession sensitivity
- Throbbing pain with swelling/bad taste: dental abscess or gum infection
- Upper back teeth aching with cold/flu: possible sinusitis referred pain
- Morning jaw/temple ache, tooth wear: grinding/clenching (bruxism)
- Pain behind the last tooth: wisdom tooth inflammation (pericoronitis)
These patterns guide the likely cause but are not a diagnosis. An examination and X‑rays are important to confirm.
Common tooth pain causes
- Tooth decay (cavities) leading to nerve irritation or infection
- Pulpitis (inflamed tooth nerve) and dental abscess
- Cracked tooth, fractured cusp, or worn/broken fillings
- Gum disease (gingivitis/periodontitis) and gum abscess
- Gum recession with exposed roots causing sensitivity
- Grinding or clenching (bruxism) and bite overload
- Wisdom tooth problems (pericoronitis or impaction)
- Sinus infection or pressure referred to upper molars
- Recent dental work settling, high bite after a new filling or crown
- Trauma to a tooth (chip, crack or luxation)
- Whitening, acidic diet or reflux increasing sensitivity
- Jaw joint/muscle problems mimicking toothache
Multiple factors can combine. For example, a large old filling plus night grinding often leads to cracks and bite pain.
Risk factors
- Frequent sugar or acidic drinks/snacks
- Infrequent brushing/flossing or no fluoride toothpaste
- Dry mouth from medications or medical conditions
- Smoking or vaping
- Diabetes and immune conditions
- Stress, poor sleep and jaw clenching
- Large, old fillings or previous trauma
- Wisdom teeth partly erupted and difficult to clean
- Pregnancy‑related gum inflammation
When tooth pain is urgent
- Facial swelling, spreading infection, fever or feeling unwell
- Severe pain not controlled by over‑the‑counter pain relief
- Trauma, a knocked‑out tooth or uncontrolled bleeding
- Difficulty swallowing or breathing
If any of the above apply, seek an emergency dentist or hospital care promptly.
How dentists find the cause
A dental diagnosis usually includes a history of your symptoms, an examination of teeth and gums, bite checks, temperature tests, percussion/palpation, and X‑rays. Sometimes a 3D scan (CBCT) helps with complex roots or sinus issues. This pinpoints whether decay, a crack, gum disease, bite overload or another issue is responsible—so treatment matches the true cause.
If you are anxious, clinics can discuss options for gentle care, numbing gels, and sedation where appropriate. Learn more: dental anxiety support.
Likely treatments by cause
- Decay or broken filling: cleaning the decay and placing a new filling or onlay
- Inflamed or infected nerve: root canal treatment to save the tooth, or extraction if not restorable
- Cracked tooth: bite adjustment plus onlay/crown; some cracks require root canal or extraction
- Gum disease: professional cleaning, home care coaching and periodontal therapy
- Sensitivity (exposed dentine): desensitising toothpaste, fluoride varnish, bonding or gum grafting in selected cases
- Grinding/clenching: bite adjustment and a custom night splint
- Wisdom tooth inflammation: cleaning/irrigation, symptom control and often wisdom tooth removal
- Sinus‑related toothache: medical treatment via a GP; dental review to rule out dental infection
For cost guidance, see tooth pain costs in Australia.
Self‑care: what helps now (and what to avoid)
- Rinse gently with warm salty water to keep the area clean
- Use over‑the‑counter pain relief as directed (commonly paracetamol and/or ibuprofen if suitable for you). Avoid placing aspirin on the gum
- Cold compress on the cheek for swelling. Avoid heat on a swollen area
- Keep food soft and chew on the other side until assessed
- Avoid very hot/cold, sugary or acidic foods/drinks that trigger pain
- Antibiotics only help if there is a spreading infection or systemic signs—they do not fix the underlying tooth problem
Prevention tips
- Brush twice daily with fluoride toothpaste and clean between teeth
- Limit sugary/acidic drinks and snacks; rinse with water after
- Use a night splint if you grind teeth
- Replace worn fillings and address small cracks early
- Regular check‑ups and X‑rays to catch issues before they hurt
FAQs about tooth pain causes
Why do teeth hurt more at night?
Inflamed tooth nerves often throb more when lying down due to increased blood flow and pressure in the tooth. Night‑time clenching can also trigger pain.
Can stress cause tooth pain?
Yes. Stress increases jaw clenching and grinding, which can inflame teeth and muscles, cause cracks, and heighten sensitivity.
Will a toothache go away on its own?
Sensitivity can improve with care, but pain from decay, cracks or infection usually persists or worsens without treatment.
What pain relief is best for toothache?
Paracetamol and/or ibuprofen used as directed is commonly effective for dental pain if suitable for you. Ask a pharmacist or GP if unsure.
How long can I wait?
If pain is mild and intermittent, book soon. If pain is severe, lingering to hot/cold, or there is swelling or fever, seek urgent dental care.
Related pages
Explore related topics: Emergency dentist, Root canal, Gum disease, Wisdom teeth, Tooth extraction, Dental crowns, Jaw pain.
Confidential help
If you want help understanding your symptoms, comparing treatment options or finding a clinic that suits your location, budget and timing, you can send a confidential enquiry below.
This site provides information and referral support in Australia.