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Finding the cause of tooth pain is a separate step from treating it. The tooth that hurts is not always the tooth responsible, the pain may be gone by the time you arrive, and the same symptom can come from a nerve, a crack, the gum or a muscle. At Vizcaya Dental Arts a problem visit starts with your history, then tests that single out the tooth, then X-rays, and a 3D scan only when a flat image cannot answer the question. The treatments themselves are described on their own pages.
Your history
The most important part of a diagnosis is what you tell us:
- What does it feel like, and where?
- Does it hurt on its own or only when something sets it off: cold, heat, sweet, chewing, releasing a bite?
- How long does it last, seconds or hours?
- Does it wake you at night?
- Did it begin after a filling, a crown, a cold or a blow to the mouth?
- Has it happened before?
Pain that comes and goes is common, and so is pain that has faded by the time of the appointment.
A few things help:
- If the pain comes and goes, note when it happens and what you were doing; a short diary over a few days is more useful than a description from memory.
- If a tooth has changed color, chipped or started catching food, mention it even if it does not hurt.
- Bring any X-rays or treatment plans from another office, and the name of anything you have been taking for the pain.
- If you have been told what the problem is and want a second opinion, say so, and we examine from scratch.
Tests that single out the tooth
Because the mouth is poor at localizing pain, we use tests that compare one tooth with its neighbors.
Cold testing. A cold swab held against each tooth in turn shows how the nerve responds: a quick, fading sensation in a healthy tooth, a sharp or lingering ache where the nerve is inflamed, nothing where the nerve has died. We read it together with everything else.
Percussion. Gentle tapping. A tooth that is tender to tapping often has inflammation at the root tip or in the ligament around it, though tenderness alone does not prove an infection or a need for root canal treatment.
Bite tests. For suspected cracks you bite on a cotton roll or a small bite-testing device, tooth by tooth. Pain on releasing the bite is a classic sign of a cracked tooth. We also look with magnification and sometimes shine a light through the tooth, which can show a crack line.
Gum measurements. Periodontal probing is routine at the first examination and repeated for anyone with gum concerns.
Muscle examination. When the complaint is soreness, tightness or spasm in the jaw muscles, or pain near the joint, we examine the muscles and ask about clenching and grinding.
Imaging
Digital X-rays of individual teeth are the basic imaging. The sensors give sharp images at a low dose, and we take the pictures that answer the question.
When a flat image is not enough, we take a CBCT scan, a three-dimensional X-ray, in the office. We use it:
- For root canal problems where the two-dimensional X-ray does not show the whole picture
- To see where a lower wisdom tooth sits in relation to the nerve
- To plan implants
- To look for infections that ordinary X-rays miss
- To assess some lesions in the bone
Most problems do not need a scan.
Cracks
The word crack covers very different problems. A crack can be a shallow line in enamel that will never matter, a fracture that will eventually let a corner of the tooth chip off, or a split heading below the gum that threatens the tooth. The direction, depth and position decide which. Part of the diagnosis is explaining what kind of crack you have, what it is likely to do, and the options, from watching it to covering the tooth with a crown before it splits. Our crowns page explains why a crown is sometimes recommended for a crack that does not yet hurt.
When the tests disagree
Sometimes the history points one way, the cold test another, and the X-ray shows nothing. Early problems are often ambiguous. What we do depends on how much you are suffering.
If the symptoms are mild, we often wait a week or two and look again, with a plan for when to come back and what to watch for. Real problems tend to become clearer, and that is better than treating a tooth on a guess. If anything gets worse, we see you sooner.
If the pain is severe, we do not wait. We treat what the evidence points to most strongly, relieve the symptoms, and reassess. Medication depends on the diagnosis: a rinse, an anti-inflammatory, occasionally an antibiotic when there are signs of infection. Antibiotics do not fix tooth pain by themselves, and we do not prescribe them as a reflex.
Pain that is not a tooth
Part of the examination is ruling out the things that imitate a toothache:
- Clenching and grinding can leave a whole side of the jaw sore.
- A sinus infection can make the upper back teeth ache.
- Gum inflammation around one tooth can feel like the tooth itself.
- Some symptoms, such as jaw or arm pain with shortness of breath or chest pressure, are not dental at all and need a physician or an emergency room first.
From diagnosis to treatment
Once we know the cause:
- Root canal treatment for an inflamed or dead nerve
- A filling or crown for decay or a crack
- Gum treatment for periodontal problems
- A night guard for grinding
If you are in pain now, our emergency care page explains how to reach us and what to expect.
Frequently asked questions
Why can you not just tell me which tooth it is?
Because the mouth is bad at telling you. Pain from one tooth is often felt in a neighbor, or across a whole side, or in the ear. Gum problems and muscle problems can feel like a toothache. The tests exist to make the tooth identify itself rather than guessing from where it hurts.
What does a cold test feel like?
A cold swab is held against a tooth for a few seconds. A healthy tooth feels the cold and the feeling fades quickly; a tooth with an inflamed nerve may react sharply or keep aching after the cold is gone; a tooth with a dead nerve may feel nothing. We compare the response with your other teeth, not against a textbook.
Do I need a 3D scan?
Only when a flat X-ray cannot answer the question. We use a CBCT scan for certain root canal problems, for lower wisdom teeth near the nerve, for implant planning, for suspected infections that regular X-rays do not show, and for some lesions. Most diagnoses do not need one.
What if the pain has already gone away?
Tell us anyway. Pain that came and went is common and we investigate it routinely; the history of what it felt like, what set it off and how long it lasted is often more useful than the examination on a quiet day.
What happens if nothing is found?
When symptoms are mild and the tests disagree, the honest answer is sometimes to wait a week or two and look again with a specific follow-up plan, because an early problem often declares itself. If the pain is severe, we do not wait; we treat what is most likely and reassess. Either way we tell you what we are thinking rather than treating a tooth on a guess.
Can a crack be seen on an X-ray?
Rarely. Most cracks are found by looking closely, by shining a light through the tooth, and by bite tests that reproduce the pain on release. Even then the full extent is not always knowable in advance, which is why we explain what different kinds of crack can mean for the tooth.
Sources
Professional guidelines and peer-reviewed reviews this page draws on.
- Benavides E, Krecioch JR, Connolly RT, et al. Optimizing radiation safety in dentistry: clinical recommendations and regulatory considerations. Journal of the American Dental Association. 2024;155(4):280-293. DOI
