Written by Dr. Adriana Leone, DMD, founder of Wall Street Dental Spa
Temporomandibular disorders have no single cause. Jaw injury, arthritis, clenching, stress, and genetics all contribute, and in most cases no clear cause is identified. Almost everyone who sits down in my chair with jaw pain arrives with an explanation they were given somewhere else, and it is usually their bite. That is the one the evidence does not support.
| What you have probably been told | What the research shows |
|---|---|
| A bad bite or crooked teeth cause TMJ | Research does not support a bad bite, or braces, as a cause |
| Teeth grinding is the cause | Plenty of people with jaw problems never grind, and plenty of lifelong grinders never develop one |
| Clicking means the joint is damaged | Clicking without pain is common and needs no treatment |
| Jaw pain gets worse if you leave it | Many cases are short lived and settle without treatment |
| There is one cause to find | In most cases, no exact cause is ever identified |
TMJ is not one condition. The term covers more than 30 separate disorders, and it is not the medical name for any of them.
TMJ stands for the temporomandibular joint, the hinge in front of each ear that lets your jaw open, close and slide. The disorders that affect that joint and the muscles around it are called TMDs. Two people who both say “I have TMJ” can have completely different problems that need completely different care.
Dentists sort those disorders into three groups: problems inside the joint itself, including the small disc that cushions it, problems in the chewing muscles, and headaches that come along with either. A patient can have more than one at the same time.
Jaw pain in this family is common. Estimates put the number of American adults living with it at up to 12 million, most of them between 20 and 40 years old, and women are affected about twice as often as men.
Several things contribute, and they almost never act alone.
Injury is the clearest one. A blow to the jaw, a whiplash injury, or a dislocation can start a problem that lasts. Arthritis in the joint can wear the cartilage down over time, and the cushioning disc can slip out of position and catch as you open.
Beyond those, the picture gets less mechanical and more medical. A 2024 systematic review of long term studies found that the factors most consistently linked to new jaw problems were female sex, symptoms of depression and anxiety, perceived stress, poor sleep quality and signs of sleep apnea, along with other ongoing pain conditions such as frequent headaches, migraine and lower back pain.
Genetics play a part too, as do hormones, which is one reason researchers keep looking at why women in their 30s and 40s are affected so much more often.
Then there is the finding that surprises people most: for the majority of patients, no specific cause is ever pinned down. Symptoms start without an obvious reason. That does not mean the pain is imaginary, and it does not mean nothing helps. What it means is that a confident single explanation should make you ask questions.
Stress is strongly associated with jaw pain, but calling it the cause overstates what the research shows. Stress raises muscle tension and clenching, and both can aggravate a sore joint. The arrow also runs backwards, since living with facial pain is itself stressful, so studies often cannot separate which came first.
Grinding contributes for some people, though the link is weaker than its reputation. Many people with jaw joint problems do not grind their teeth, and many long term grinders never develop any joint trouble. Grinding is one factor among several rather than the explanation on its own.
No, and this is where I end up correcting the record most often. Research does not support the belief that a bad bite or orthodontic treatment causes these disorders, and the National Institute of Dental and Craniofacial Research says so directly.
The idea has been around for decades, which is why so many patients have heard it. Jaw pain behaves far more like lower back pain than like a wheel out of alignment on a car. Back pain rarely traces to one crooked part, and jaw pain rarely does either.
The practical consequence matters more than the theory. Treatments that permanently change your teeth and bite to treat jaw pain, such as crowning back teeth, grinding down tooth surfaces, or moving teeth with orthodontics, do not have good evidence behind them, and in some cases people end up feeling worse. Once tooth structure is gone, no one can put it back.
A patient came to me two years ago with a printed plan for eight crowns, quoted to her as the fix for a morning jaw ache. No one had asked about her sleep, her stress at work, or the fact that the pain started three weeks after a car accident. What she needed first was for someone to take a proper history.
If a dentist proposes irreversible work on your teeth to solve jaw pain, ask what evidence supports it for your specific diagnosis, and get a second opinion from a dentist who treats orofacial pain. Federal guidance recommends exactly that.
Flare-ups have their own triggers, separate from whatever started the problem in the first place.
The ones my patients report most often are food related. A bagel, a tough steak, chewing gum for an hour on the subway. Anything that keeps the jaw working hard for a long stretch tends to show up as soreness the next morning.
The rest cluster around load and sleep:
Red flags: these are different from a flare and should be looked at rather than waited out.
Noticing your own pattern is genuinely useful. Patients who can tell me their pain follows deadlines, or shows up after chewy meals, give me far more to work with than a pain scale ever does.
Wondering what an evaluation for jaw pain involves?
Understanding your triggers is a good start, and a proper exam fills in the rest, including which of the 30 or so disorders you are dealing with.
See how a TMJ evaluation works
Most cases are managed with conservative care, and knowing that up front takes some of the worry out of the visit.
Pain in the chewing muscles or in the joint itself is the most common sign, and the symptom that worries people most is usually the one that means the least.
Along with pain, the signs I look for are jaw stiffness, limited opening, painful clicking or grating during movement, pain spreading into the face or neck, earaches with healthy ears, and a change in the way the teeth fit together. Ringing in the ears and dizziness show up for some patients too.
Self diagnosis only goes so far, since toothache, sinus problems, ear infections and nerve pain can all feel like jaw pain. Ruling those out is part of what an exam is for.
Clicking usually comes from the small disc inside the joint moving in and out of position as you open and close. On its own, without pain and without locking, that noise is considered normal and does not need treatment. Clicking that comes with pain, or with a jaw that catches, is worth having examined.
One sided pain is completely normal for jaw disorders, because you have two joints working independently and only one may be irritated. Chewing habitually on one side makes it more likely. Pain that stays on one side and does not follow jaw movement, though, can point to a tooth, an ear or a sinus problem instead.
Many cases do. A large share of jaw joint and muscle problems are temporary, and they settle without any treatment at all.
The odds of natural recovery shape how I approach a new patient. Simple, reversible steps come first: softer food for a while, heat or cold, gentle movement, over the counter anti-inflammatories, and cutting back on gum, nail biting and daytime clenching once you learn to catch yourself doing it. Sleep and stress come up in that first conversation too, because both show up repeatedly in the research.
If symptoms persist, the next steps stay conservative. Physical therapy has reasonable evidence behind it. So do behavioural approaches such as cognitive behavioural therapy and biofeedback, which sound unrelated to a jaw until you look at how much clenching happens outside your awareness. Night guards are common and reasonable to try, though the evidence that they reduce pain is thinner than most people assume, and no appliance should be designed to permanently change your bite.
Surgery and joint injections exist for the small number of cases that need them. For most patients, the honest answer is that time, small adjustments and patience do most of the work.
Jaw pain that has lasted more than a few weeks deserves an exam.
An evaluation is a conversation and a physical exam rather than a procedure, and the first job is working out which of these problems you have.
Our Financial District office sees a lot of clenchers, and we take the whole history alongside the dental exam.
There is no single main cause. Jaw injury is the clearest identifiable one, followed by arthritis and disc problems inside the joint. Stress, poor sleep, genetics, hormones and other chronic pain conditions all raise risk. For most patients, no exact cause is ever identified, which is normal rather than a diagnostic failure.
Stress is one of the most consistent factors linked to jaw pain, but it rarely acts alone and researchers describe it as an association rather than a cause. Stress raises clenching and muscle tension, which can aggravate a sore joint. Living with facial pain also raises stress, so the relationship runs in both directions.
No. Current research does not support the belief that a bad bite or orthodontic treatment causes temporomandibular disorders. Treatments that permanently change the teeth or bite to relieve jaw pain lack good evidence and sometimes make symptoms worse. Ask what evidence supports any irreversible plan, and consider a second opinion.
Flare-ups vary widely, from a couple of days to several weeks, depending on the trigger and how quickly the load comes off the joint. Softer food, gentle movement and reduced clenching usually shorten one. Pain that persists beyond a few weeks, or that keeps returning, should be evaluated rather than managed at home.
Usually not. Clicking or popping in the jaw joint without pain is common, considered normal and does not require treatment. The noise comes from the joint disc shifting as you open and close. Clicking that arrives with pain, locking, or a jaw that catches on opening is the version that needs an exam.
Start with a dentist, since dentists examine the joint, the muscles and the teeth together and can rule out a dental cause. Ongoing or severe pain may call for a dentist who treats orofacial pain specifically. A physician is the right first stop if jaw pain comes with chest pain, fever or facial swelling.
Dr. Adriana Leone, DMD, is the founder of Wall Street Dental Spa in Manhattan’s Financial District. A graduate of Tufts University School of Dental Medicine, she has practiced dentistry since 1999 and opened her boutique practice in 2005. Dr. Leone is recognized among America’s Top Dentists and is one of New York City’s most experienced Invisalign providers, with more than 500 cases completed. She built Wall Street Dental Spa around calm, judgment-free, wellness-focused care for busy NYC professionals.
