What does my type of tooth pain mean?
As a broad guide: brief sharp pain with cold or sweet often points to early decay or exposed root surfaces, pain on biting suggests a crack or a problem at the root, and constant throbbing pain — especially at night — usually means inflammation deep inside the tooth. These are patterns, not diagnoses; the same symptoms overlap between conditions, so a dentist needs to examine and test the tooth to identify the actual cause.
Common causes
- Decay that has reached the sensitive inner layers of the tooth
- Infection or inflammation of the nerve (pulp) inside the tooth
- A cracked or fractured tooth, sometimes invisible to the eye
- An abscess at the root tip or in the gum beside the tooth
- A lost or broken filling exposing the tooth interior
- Gum recession exposing sensitive root surfaces
- An erupting or impacted wisdom tooth pressing on its neighbour
Warning signs to watch for
- Pain that lingers for more than a few seconds after the trigger is gone
- Throbbing pain that worsens on lying down or wakes you at night
- Pain on biting or releasing a bite on one particular tooth
- Swelling of the gum or face near the painful tooth
- A tooth that has turned darker than its neighbours
- Fever or feeling generally unwell along with the toothache
When should you see a dentist?
Any toothache that lasts more than a day or two deserves an appointment — pain that eases on its own has often not resolved; the nerve may simply have quietened while the problem continues. Seek urgent care the same day if you have severe throbbing pain, swelling of the face or jaw, fever with a toothache, or pain with difficulty opening your mouth or swallowing. These signs can indicate a spreading infection that should not wait.
How it is diagnosed
Diagnosing a toothache is detective work: Dr Shantanu Rao will ask about the pain's triggers, duration and pattern, then examine the suspect area, tap and test individual teeth, and check the gums around them. An X-ray of the region shows decay between teeth, infection at root tips and bone changes that are invisible from the surface. Occasionally the tooth that hurts is not the tooth causing the pain — referred pain is common in the mouth — which is why testing matters more than guessing.
Possible treatment directions
Treatment depends entirely on the diagnosis. Directions a dentist may consider include:
- A tooth-coloured filling where decay is caught before reaching the nerve.
- Root canal treatment to save a tooth whose nerve is inflamed or infected, usually followed by a crown for protection.
- Treatment of a gum abscess where the source is the gum rather than the tooth.
- Desensitising care or gum treatment where exposed roots are the cause.
- Extraction only when a tooth is truly unrestorable — with replacement options such as an implant discussed at the same time.
What can happen if it is ignored
A toothache is the tooth asking for help while it can still be saved. Ignored, decay or infection tends to progress from a small filling problem to a root canal situation, and eventually to an abscess or an unsaveable tooth. Painkillers have a place for short-term comfort, but they treat the sensation, not the cause. Early treatment is almost always simpler, quicker and less expensive than late treatment.
Frequently asked questions
My toothache disappeared on its own. Am I in the clear?
Not necessarily. When a tooth nerve dies, pain can vanish even though infection continues silently at the root. A tooth that hurt significantly and then went quiet should still be examined.
What can I do at home until my appointment?
Rinse with warm salt water, avoid very hot, cold or hard foods on that side, and take an over-the-counter painkiller as per its label if you have no medical reason to avoid it. Never place aspirin against the gum — it burns the tissue.
Will antibiotics cure my toothache?
Antibiotics do not remove the cause of dental pain and are not a substitute for treatment. They are prescribed selectively — for example, with spreading infection or fever — always alongside definitive dental care.
Why does my tooth hurt more at night?
Lying down increases blood pressure in the head, which raises pressure inside an inflamed tooth. Night-time throbbing typically signals nerve inflammation, which is worth having examined promptly.