Why Does My Jaw Click When I Chew Now?

Written by the Nuvirox Research Team

Short answer: yes, it's almost certainly a shifted disc in your temporomandibular joint, and no, painless clicking on its own usually isn't something to worry about — but the trigger is more likely a habit or stressor than "getting older." That pop or click when you chew, yawn, or open wide has a well-mapped mechanical cause.

What actually causes the click?

A click when you open, close, or chew almost always means the small cartilage disc inside your temporomandibular joint (TMJ) is sitting slightly out of its normal position and snapping back into place as your jaw moves. The TMJ is a sliding hinge joint, and a thin disc cushions the space between your jawbone (the condyle) and your skull. When that disc shifts forward, chewing or wide opening can cause the condyle to "catch" on it and pop it back into alignment — that pop or click is what you feel and often hear.

Is this a new age-related problem, or has it always been more common than people think?

Here's the genuinely surprising part: TMJ disc displacement is not primarily an aging phenomenon — it's more common in younger adults. A bibliometric review of TMJ disc displacement research notes the incidence in the general population runs 18–35%, and that displacement is more likely to occur in adolescents and young adults, with some studies linking it to hormonal changes during sexual maturation.^[1] A clinical correlation study of clicking symptoms and MRI-confirmed disc displacement had a mean patient age of just 25.8 years.^[2] So if this is new for you at 40 or 50, it's less likely to be simple "wear and tear" catching up and more likely tied to a specific new habit or stressor.

What actually triggers new-onset clicking in adulthood?

The most common contributors researchers point to are bruxism (clenching or grinding, often stress- or sleep-related), a shift toward chewing hard or tough foods on one side, jaw trauma, and changes in bite alignment — sometimes following dental work. A study of TMJ disorders in dental students found a significant association between both bruxism history and anxiety scores and the presence of TMD, particularly disc displacement with reduction.^[3] If your clicking started around a stretch of high stress, a new mouthguard or dental appliance, or a change in how you sleep, that timeline is often more informative than "getting older."

What human studies actually show

An MRI study of disc position in a preclinical population found anterior disc displacement was frequently present even in people with no symptoms at all^[4] — meaning a clicking joint, or even one with a genuinely displaced disc on imaging, doesn't automatically indicate a problem requiring treatment. Painless clicking is generally considered a normal variant rather than a disorder.

The honest counterweight: clicking that progresses to pain, locking, or a limited range of motion is a different picture. A meta-analysis of TMD patients with disc displacement found degenerative joint changes (sclerosis, erosion, osteophytes) present in roughly half of cases, and more common in disc displacement without reduction — the type where the disc doesn't pop back into place and the joint may lock.^[5] That's the pattern that benefits from a dental or oral-maxillofacial evaluation rather than simply monitoring.

When painless clicking is fine to just watch

If your jaw clicks but doesn't hurt, doesn't catch or lock, and your bite and chewing feel normal otherwise, most clinicians consider that a benign finding that doesn't need active treatment. Reasonable self-care in the meantime: avoiding extremely wide yawns or bites (like a big burger), cutting back on gum chewing, being mindful of daytime clenching, and addressing any new grinding habit, especially at night.

Does grinding or clenching during sleep specifically explain new clicking?

It's one of the more common findings in adults presenting with new TMJ symptoms. A cross-sectional study of TMD in dental students found both a history of bruxism and higher anxiety scores were significantly associated with temporomandibular disorders, and that disc displacement with reduction (the clicking variety) was the single most frequent diagnosis among affected students.^[6] Because bruxism frequently happens during sleep, many people aren't consciously aware they're doing it — a partner noticing grinding sounds, morning jaw soreness, or flattened tooth surfaces on a dental exam are often the first clues.

Can orthodontic work or a new dental crown cause this?
Yes — any change that alters how your upper and lower teeth meet can shift the load distribution across the jaw joint, and clicking that started shortly after dental work is worth mentioning to your dentist specifically, since it may be adjustable.

Frequently asked questions

Should I see a dentist just for clicking?
If it's painless and not accompanied by locking or a bite change, it's reasonable to mention at your next routine visit rather than seeking an urgent appointment. Pain, locking, or a bite that suddenly feels different warrants a sooner evaluation.

Is stress really a plausible cause?
Yes — the link between anxiety, bruxism, and TMJ disc displacement shows up consistently in clinical studies, including in populations with no other risk factors.^[3]

Can a mouthguard help?
A properly fitted night guard can reduce clenching-related joint stress for people who grind their teeth at night, though it addresses the muscle/behavior side rather than repositioning the disc itself.

Does the clicking mean the disc will eventually get worse?
Not necessarily. Disc displacement with reduction (the clicking kind) can remain stable for years without progressing to locking or degenerative change in many people.

Related reading: another common oral-health change worth understanding, a related dental sensitivity question, and a nearby-structure symptom with its own separate mechanism.

From Nuvirox

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The bottom line

A clicking jaw usually reflects a shifted disc doing exactly what discs like this do — and the surprising twist is that it's more common in younger adults than older ones, so a stress-related or dental trigger is a more likely explanation than aging itself. Painless clicking without locking is a benign finding worth monitoring, not treating.

References

1. Wang Q, Jia J, Zhou C, Ye W, Bi R. A Bibliometric Analysis of Research on Temporomandibular Joint Disc Displacement from 1992 to 2022. Healthcare (Basel). 2023. DOI: 10.3390/healthcare11142108. PMCID: PMC10379638.
2. Correlation Between Clicking Sound Symptoms and Magnetic Resonance Imaging Findings in Patients with Temporomandibular Joint Internal Derangement. PMCID: PMC12269763.
3. Temporomandibular joints disorders (TMDs) prevalence and their relation to anxiety in dental students. PMCID: PMC10643880.
4. Prevalence and characteristics of temporomandibular joint disc displacement based on MRI in pre-clinical diagnosis. PMID: 42472270.
5. Prevalence of degenerative disease in temporomandibular disorder patients with disc displacement: A systematic review and meta-analysis. J Craniomaxillofac Surg. 2020.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for professional medical advice.