PTSD and Teeth Grinding: Is There a Connection?

What Is Bruxism?

Bruxism refers to repetitive jaw-muscle activity that can include grinding, clenching or jaw bracing.

It can occur in two different settings:

• Awake bruxism: clenching, bracing or repetitive tooth contact while awake.
• Sleep bruxism: jaw-muscle activity that occurs during sleep.

The distinction is important because awake and sleep bruxism do not necessarily have the same contributing factors or mechanisms.

According to the National Institute of Dental and Craniofacial Research, bruxism is believed to be multifactorial. Factors associated with it include psychosocial stress and mood, genetics, alcohol and caffeine use, smoking and certain medications.

For the broader picture, see What Causes Teeth Grinding? Bruxism Causes & Risk Factors.

Is PTSD Associated With Teeth Grinding or Clenching?

Yes, there is evidence of an association — particularly with awake bruxism.

One case-control study compared 38 people diagnosed with PTSD with 38 people without PTSD.

After statistical adjustment, PTSD was associated with self-reported awake bruxism. The researchers calculated that participants with PTSD had about three times the odds of reporting awake bruxism compared with controls.

Importantly, the same study did not find an association between PTSD and self-reported sleep bruxism.

The study also found an association between PTSD and low-intensity orofacial pain.

What Does Newer Research Show?

A larger 2025 study provides additional support for the awake-bruxism connection.

Researchers evaluated 701 patients attending a specialized clinic for orofacial pain and dysfunction.

PTSD was associated with:

• Awake bruxism
• Painful temporomandibular disorders (TMD)

Greater post-traumatic stress symptoms were also correlated with greater awake-bruxism symptoms.

One particularly interesting finding was that simply reporting a potentially traumatic event was not associated with awake bruxism or painful TMD when PTSD itself was absent.

Again, these were associations observed in a clinical population. They do not establish a simple cause-and-effect relationship.

What About Sleep Bruxism?

This is where older explanations can become misleading.

It is tempting to describe nighttime grinding as the subconscious mind releasing fear, anger, anxiety or unresolved trauma.

Current evidence does not support that explanation as an established mechanism of sleep bruxism.

Sleep bruxism is a sleep-related jaw-muscle behavior with complex neurophysiologic mechanisms. Emotional and psychological factors may still be relevant to an individual's overall health, but we should not reduce sleep bruxism to “stress coming out at night.”

The available PTSD studies have actually been more consistent in identifying an association with awake bruxism than with sleep bruxism.

Why Might Awake Clenching and PTSD Occur Together?

Researchers do not yet have one definitive explanation.

PTSD can involve persistent changes in arousal, attention, mood and responses to perceived threat. Bruxism research separately shows associations between psychosocial factors such as stress, distress and nervousness and jaw-muscle behaviors.

Those overlapping factors could help explain why awake clenching or jaw bracing is more frequently reported in some people with PTSD.

But this remains different from saying:

“PTSD makes people grind their teeth.”

Not everyone with PTSD develops bruxism, and many people with bruxism do not have PTSD.

Does Trauma Alone Cause Bruxism?

Current research does not support that conclusion.

The 2025 study found that a history of a potentially traumatic event by itself was not associated with the orofacial conditions being studied when PTSD was not present.

That is an important distinction because experiencing trauma and developing post-traumatic stress disorder are not the same thing.

PTSD is a clinical condition diagnosed by a qualified mental-health professional. Bruxism is also assessed independently based on jaw-muscle behavior, symptoms, dental findings and, when appropriate, sleep testing.

What Have Studies of Veterans Found?

Researchers have also investigated oral health among combat veterans with PTSD.

A 2020 pilot study of 71 Israeli veterans with combat-related PTSD found a high prevalence of signs and symptoms described as parafunctional activity — behaviors such as clenching or grinding.

Later research comparing veterans with combat-related PTSD with control patients also identified substantial oral, periodontal and dental health burdens in the PTSD group.

These studies are useful, but they have limitations.

Combat veterans with longstanding PTSD are a very specific population, and findings from these groups should not automatically be applied to every person with PTSD.

Oral health can also be influenced by smoking, medications, access to care, self-care, dry mouth and numerous other factors.

Can PTSD Medications Cause Bruxism?

Certain antidepressant medications have been reported in association with grinding, clenching and jaw symptoms.

This matters because some of the medications commonly used to treat PTSD belong to the SSRI or SNRI antidepressant classes.

However, saying that “PTSD medication causes bruxism” is too broad.

A 2026 critical review found that much of the evidence connecting SSRIs and SNRIs with bruxism comes from case reports, case series and cross-sectional studies relying heavily on self-reported symptoms.

Researchers noted that underlying psychological conditions, sleep factors and inconsistent definitions of awake versus sleep bruxism make causation difficult to establish.

Earlier systematic reviews have nevertheless identified an apparent association between some antidepressants and bruxism.

What Medications Are Used for PTSD?

The U.S. Department of Veterans Affairs identifies sertraline, paroxetine and venlafaxine among the medications with the strongest evidence for treating PTSD.

Because antidepressant-associated bruxism has been reported, someone experiencing new jaw clenching after a medication change may reasonably discuss that possibility with their prescribing clinician.

That conversation should be individualized. The benefits of successfully treating PTSD can be substantial, and medication decisions should not be made from a dental article or based on bruxism symptoms alone.

Does Treating PTSD Treat Bruxism?

We do not have evidence showing that successful PTSD treatment automatically eliminates bruxism.

Likewise, treating bruxism does not treat PTSD.

These are separate conditions that may require different professionals and different goals.

The VA and Department of Defense recommend evidence-based trauma-focused psychotherapies such as Cognitive Processing Therapy (CPT), Prolonged Exposure (PE) and Eye Movement Desensitization and Reprocessing (EMDR) among the most effective treatments for PTSD.

PTSD care belongs with a qualified mental-health or medical professional.

Dental care can occur alongside that treatment when clenching, grinding, tooth wear or jaw symptoms are present.

What Can Help With Awake Clenching?

Awake bruxism has one practical advantage: because it occurs while you're conscious, increasing awareness of the behavior may help some people interrupt it.

NIDCR recommends strategies such as changing the resting position of the mouth and jaw and using reminders to keep the teeth apart when daytime clenching is occurring.

This does not mean a person should constantly monitor every jaw sensation.

Simple awareness cues can be enough:

• Notice whether your teeth are touching while concentrating
• Allow the jaw to rest rather than actively holding it clenched
• Use occasional phone or computer reminders if you repeatedly catch yourself clenching
• Discuss persistent jaw-muscle pain with a dentist or appropriate healthcare professional

Read more in Why Do I Clench My Teeth?.

Can a Night Guard Help Someone With PTSD and Bruxism?

A night guard can be useful when grinding or clenching is placing the teeth at risk.

But its role needs to be defined clearly.

A night guard:

• Can create a protective surface between opposing teeth
• Can help protect teeth and dental restorations from direct grinding wear
• Does not treat PTSD
• Does not resolve trauma
• Does not guarantee that grinding or clenching will stop

If your primary problem is awake clenching, a nighttime appliance also cannot replace awareness and behavioral strategies during the day.

Learn more about how mouth guards protect teeth from grinding and clenching.

How Do You Know Whether You Actually Have Bruxism?

PTSD is not evidence that you grind your teeth.

Look instead for findings associated with bruxism, such as:

• Repeated daytime clenching or jaw bracing
• Jaw-muscle soreness, tightness or fatigue
• Flattened, chipped or cracked teeth
• Progressive enamel wear
• Tooth sensitivity
• Damage to restorations
• Grinding sounds reported by a sleep partner

None of these signs alone proves bruxism.

A dentist can evaluate the teeth, restorations, jaw muscles and symptom history and determine whether additional evaluation is needed.

See our Warning Signs of Bruxism for a fuller explanation.

What About Jaw Pain and TMD?

PTSD, awake bruxism and painful temporomandibular disorders can occur together, but they should not be treated as interchangeable diagnoses.

Bruxism describes jaw-muscle activity.

TMD refers to a group of disorders involving the jaw joints, chewing muscles and related structures.

Someone can clench without developing painful TMD, and someone can have a TMD without bruxism being the primary cause.

Persistent facial or jaw pain therefore deserves its own assessment rather than automatically being attributed to PTSD or grinding.

When to Seek Dental Care

Consider a dental evaluation if you notice:

• Progressive tooth wear
• New chips or cracks
• Persistent tooth sensitivity
• Repeated damage to fillings, crowns or bonding
• Persistent jaw or facial pain
• Difficulty or pain when opening the mouth
• Jaw locking
• A persistent change in your bite

If you are already receiving care for PTSD, let both your dental and mental-health providers know about significant new jaw symptoms — especially when those symptoms began after a medication change.

Frequently Asked Questions

Can PTSD cause teeth grinding?

PTSD has been associated with bruxism in research, especially awake clenching, but current evidence does not prove that PTSD directly causes grinding in every person.

Is PTSD associated with sleep bruxism?

The evidence is less convincing than it is for awake bruxism. A case-control study found an association between PTSD and awake bruxism but not sleep bruxism.

Why do people with PTSD clench their jaws?

There is no single proven mechanism. PTSD can involve heightened arousal and distress, while psychosocial factors are separately associated with awake bruxism. These overlapping factors may help explain the observed association.

Is grinding a way for the brain to release trauma or anger?

That is not an established scientific explanation for bruxism. Sleep grinding should not be described as the subconscious mind releasing suppressed trauma, anger or anxiety.

Can antidepressants used for PTSD cause bruxism?

Bruxism has been reported in association with some SSRI and SNRI antidepressants, but current evidence does not establish simple causation. If symptoms appear after starting or changing a medication, discuss the timing with your prescriber rather than changing treatment on your own.

Will treating PTSD stop teeth grinding?

Not necessarily. Treating PTSD is important for its own reasons, but we do not have evidence that successful PTSD treatment automatically eliminates bruxism.

Can a night guard treat PTSD-related grinding?

A night guard can protect teeth when grinding or clenching is causing dental wear, but it does not treat PTSD and does not guarantee that bruxism will stop.

Should I tell my therapist or psychiatrist that I clench my teeth?

Yes, particularly if clenching began after a medication was started or adjusted. It can also be useful to tell your dentist about relevant medications and mental-health treatment so your care can be coordinated appropriately.

The Bottom Line

PTSD and bruxism can occur together, but the strongest recent evidence points toward an association with awake jaw clenching and bracing rather than a simple PTSD-to-nighttime-grinding pathway.

Research does not support the idea that sleep bruxism is simply the brain releasing trauma, anger or anxiety.

Medication can complicate the picture because some antidepressants have been reported in connection with bruxism, although causation remains difficult to establish.

The best approach is to treat each issue for what it is: PTSD with qualified mental-health care, and bruxism with appropriate dental assessment, behavioral strategies when awake clenching is present, and tooth protection when needed.