Masseter Botox vs a Night Guard for Bruxism: How Dentists and Doctors Weigh the Two

The first clue is often a partner. “You were grinding again last night. It sounded like gravel.” Then comes the dull ache along the jawline at breakfast, the tooth that feels oddly sensitive, the dentist who points at flattened molar edges and says the word “bruxism” for the first time. One appointment later, there is a mold tray in your mouth. One scroll through your phone later, a friend is talking about jaw injections that “fixed it in a week.”

That is the moment most people start searching masseter botox vs night guard, and the search results do them few favors. One side sounds like a plastic mouthpiece from a sporting goods aisle; the other sounds like a cosmetic treatment that wandered into dentistry. Both impressions are incomplete.

The honest comparison is less about which option “wins” and more about what each one actually does to a clenching jaw, which problem you are trying to solve, and what a careful dentist or doctor checks before recommending either.

Masseter Botox vs night guard: why this is really two different questions

Before weighing the two, it helps to separate what each one is for. Bruxism is the medical term for grinding, gnashing or clenching the teeth, either awake or asleep. The masseter is the thick muscle you can feel bulge at the angle of the jaw when you bite down; it is the main muscle that closes the mouth and generates chewing force.

A night guard is a barrier. It sits between the upper and lower teeth so that when the jaw clenches, enamel meets plastic rather than enamel. It protects the teeth, fillings and crowns from wear. It does not, by itself, stop the muscles from working hard.

Masseter injections take the opposite approach. “Botox” is the familiar name for one brand of botulinum toxin type A, a purified protein that temporarily blocks the signal between a nerve and the muscle it controls. From here on this article uses the generic term, botulinum toxin, because the mechanism belongs to the class, not to any label. Injected into the masseter, it reduces how forcefully that muscle can contract for a period of months. It softens the clench; it does not shield the teeth.

So the first question a clinician asks is not “guard or injection?” but “what are we trying to protect or relieve?” Worn enamel and cracked restorations point toward protection. Morning jaw ache, tension headaches and a visibly enlarged masseter point toward the muscle. Many people have both problems, which is why the two approaches are sometimes combined rather than ranked.

According to the Mayo Clinic, splints and mouth guards remain the standard first measure for sleep bruxism, while botulinum toxin injections are described as an option that may help some people with severe bruxism who have not responded to other treatments. That ordering, protection first, muscle modulation later, is the frame most dentists and doctors work from.

What is bruxism, and why does the masseter muscle matter?

Bruxism comes in two patterns that often get lumped together. Awake bruxism is usually clenching rather than grinding, often during concentration or stress, and many people do not realize they are doing it until a jaw ache or a colleague points it out. Sleep bruxism is a sleep-related movement disorder, with rhythmic jaw muscle bursts during the night that the sleeper cannot control or remember. The Cleveland Clinic treats these as related but distinct conditions, and the distinction matters for treatment.

Why do people grind? The NHS lists stress and anxiety, disrupted sleep, certain medicines (particularly a class of antidepressants known as SSRIs, or selective serotonin reuptake inhibitors), and lifestyle factors such as alcohol, smoking and caffeine. The Mayo Clinic adds associations with obstructive sleep apnea, a condition in which breathing repeatedly pauses during sleep, as well as acid reflux, Parkinson’s disease, epilepsy and ADHD. Family history plays a part, and bruxism is common in young children, most of whom grow out of it.

The masseter sits at the center of the story because it is the muscle that delivers the force. During sleep bruxism, the jaw can clamp with forces that far exceed ordinary chewing, and that load lands on three places at once: tooth surfaces, the temporomandibular joints (the hinge joints just in front of each ear, usually called the TMJs), and the muscle itself. Over time the masseter can thicken, the way any muscle does under repeated heavy work, which some people notice as a squarer jawline or a tender knot when they press at the angle of the jaw.

The Mayo Clinic notes that most bruxism causes no serious complications, but severe cases can damage teeth and dental work, trigger tension-type headaches, and contribute to TMJ disorders. Each of those outcomes maps onto either the “protect the teeth” or the “calm the muscle” question from the previous section.

How a night guard for teeth grinding actually works

A night guard, also called an occlusal splint, is a removable appliance worn over the upper or lower teeth during sleep. “Occlusal” simply refers to the biting surfaces of the teeth.

Its first job is mechanical. Hard enamel grinding against hard enamel wears both surfaces; a layer of acrylic or softer plastic absorbs that friction and spreads the load across the arch rather than concentrating it on a few molars. Fillings, crowns and veneers are protected in the same way. If the guard shows scuffs and grooves after a few months, that is the point: the damage went into the appliance instead of the tooth.

The second job is subtler and less certain. By keeping the teeth slightly apart, a well-made splint changes the position of the jaw at rest, and some people find their muscles relax a little as a result. The evidence that guards reduce muscle activity is mixed, though, and the Cleveland Clinic is direct about it: a guard does not stop the grinding; it limits the harm.

Guards come in several forms. A dentist can take an impression and have a custom appliance made in hard acrylic, soft material or a dual-layer design. The NHS notes that mouth guards are also sold over the counter at pharmacies, but that a dentist-made guard fits better and is generally more comfortable. Fit is not a cosmetic detail. An appliance that rocks, covers only some teeth or sits unevenly can shift teeth over time or change the bite, which is why clinicians favor a professionally fitted device and periodic checks.

Care is simple: rinse and brush the guard after each use, store it dry, and bring it to dental checkups so the dentist can read the wear pattern. That pattern is useful data. It tells the team how hard and where you are clenching, which feeds directly into the question of whether muscle-targeted treatment is worth discussing.

How masseter botulinum toxin works on a clenching jaw

Every muscle contracts when a nerve releases a chemical messenger called acetylcholine into the tiny gap where nerve meets muscle. Botulinum toxin type A blocks that release. The nerve is intact and the muscle is intact, but the message cannot get through at the treated spots, so the muscle contracts more weakly. It is a dimmer switch, not an off switch, and it is temporary: over the following months the nerve endings form new connections and the signal returns. That self-reversing quality is the reason the treatment has to be repeated and also the reason its effects are not permanent.

In the masseter, two things happen. Within days the clench loses some of its force, so the muscle and the joint are loaded less heavily during sleep. Over several weeks the muscle itself shrinks a little, because a muscle that works less hard loses some bulk; the Cleveland Clinic describes this softening of the jaw contour as building gradually rather than appearing overnight. That slimming effect is why the same injection is used cosmetically, which has muddied public understanding of its role in bruxism.

The procedure itself is brief. The clinician asks you to clench so the muscle can be felt and marked, then places a small number of injections through the cheek into the masseter on each side. Most people describe a pinch and a little pressure; numbing is not usually needed, and you can generally go about your day afterward. The Mayo Clinic advises not rubbing or massaging the treated area for the rest of that day to avoid spreading the toxin to nearby muscles.

Who gives it varies by country: dentists with additional training, oral and maxillofacial surgeons, neurologists, dermatologists and specialist nurses all provide it in different settings. What matters more than the title is that the injector understands jaw anatomy, including the muscles that lift the corner of the mouth and the salivary gland that sits close to the masseter.

Does Botox stop teeth grinding? What the evidence shows

The short answer is no, not in the way people hope. Botulinum toxin does not switch off the brain’s drive to grind; it lowers the force the masseter can produce when that drive fires. Sleep studies in treated people typically show that the number of grinding episodes changes little, while the intensity of each episode and the pain afterward fall. For someone whose main complaint is a sore jaw and morning headaches, that can be meaningful. For someone whose main problem is wearing teeth, it is only part of the answer, because a weaker clench still grinds.

The evidence base is modest. Trials have generally been small, follow-up has often been a few months, and outcomes have mostly measured pain and muscle activity rather than long-term tooth wear or joint health. The Mayo Clinic’s position is cautious: injections may help some people with severe bruxism who do not respond to other treatments. That wording is deliberate. Bruxism is not among the licensed uses of botulinum toxin in most regions, so prescribing it for grinding is an off-label decision that rests on the clinician’s judgment and a conversation about what is and is not known.

Two further gaps deserve honesty. Repeated weakening of a chewing muscle over years has not been studied as thoroughly as patients might assume; questions about long-term muscle thinning, bone remodeling at the jaw angle and compensation by other muscles remain open. And because the effect wears off, any benefit is a maintenance arrangement rather than a one-time fix.

None of this makes the treatment unreasonable. It makes it a targeted tool for a specific problem, muscle-driven pain and hypertrophy, used after simpler measures have been tried. A clinician who presents it that way is reading the evidence accurately; one who presents it as the thing that stops grinding is not.

Masseter Botox vs night guard: side-by-side comparison

Laid out together, the two options answer different questions. The table below summarizes what each addresses, how it is delivered and what to expect, drawing on NHS, Mayo Clinic and Cleveland Clinic guidance.

Feature	Night guard (occlusal splint)	Masseter botulinum toxin
Main purpose	Protects teeth and dental work from wear and fracture	Reduces clenching force, muscle pain and masseter bulk
Effect on grinding itself	Does not stop grinding; limits harm	Does not stop grinding; episodes are weaker
Who usually provides it	Dentist (custom) or pharmacy (over-the-counter)	Trained medical or dental injector
Onset	Immediate protection from first night; comfort improves over 1–2 weeks	Weakening within days; contour change builds over weeks
How long it lasts	Months to years, replaced when worn through	Typically about 3–4 months, sometimes longer
Reversible	Yes, stop wearing it	Yes, wears off on its own
Common downsides	Bulk, drooling, speech changes early on; bite shift if poorly fitted	Chewing fatigue, bruising, smile asymmetry if spread
Place in guidelines	Standard first measure for sleep bruxism	Considered for severe cases not helped by other treatments

A few points in the table deserve a second look. Onset and duration figures come from Mayo Clinic guidance on botulinum toxin, which notes effects usually begin within one to three days and last about three to four months or longer. The guard’s “immediate” protection is literal; the appliance works the first night it is worn, even if it feels strange.

Notice too that neither row claims to resolve the underlying cause. Both are management tools. The underlying drivers, whether stress, a sleep disorder or a medicine, belong to a separate conversation that no appliance or injection replaces.

Who is usually offered which option, and who is asked to wait

Most adults with sleep bruxism are offered a guard first, because it is low-risk, reversible and addresses the most common lasting harm, tooth wear. People with existing crowns, veneers or implants are especially likely to be steered toward a custom appliance, since restorations fracture more easily than natural teeth under repeated load.

Botulinum toxin tends to enter the discussion when muscle symptoms dominate: persistent jaw pain, tension headaches that track with clenching, a masseter that is tender and enlarged, or a guard that keeps cracking because the force is so high. It is also raised when a guard has been worn consistently and the person still wakes in pain, which suggests the problem is the muscle rather than the tooth surface.

Several groups are usually asked to wait or to choose differently. The Mayo Clinic advises that botulinum toxin is generally not recommended during pregnancy or breastfeeding. People with neuromuscular conditions such as myasthenia gravis, a disease that already weakens the connection between nerves and muscles, are typically not candidates. An active skin infection at the injection site, a known allergy to the product’s ingredients, or a bleeding disorder or blood-thinning medicine all prompt a pause or a careful plan from the prescribing clinician. Most injectors also decline to treat under-18s for bruxism, because the jaw is still developing and because children’s bruxism commonly resolves on its own, as the Mayo Clinic notes.

Guards have their own waiting list. Someone in the middle of orthodontic treatment, with loose teeth, with untreated gum disease or with large dental work pending is usually told to finish that first, since the appliance is molded to the current arrangement of the teeth.

One group should be evaluated before either option: anyone with loud snoring, witnessed pauses in breathing or daytime sleepiness alongside grinding. Sleep apnea and sleep bruxism travel together, and treating the breathing problem can change the grinding picture. That assessment belongs with a doctor, not a guard or a syringe.

How long does masseter Botox last, and what the first weeks look like

The timeline is one of the most searched questions, and it has a reasonably clear answer. The Mayo Clinic reports that botulinum toxin injections usually begin working within one to three days, although it can take a week or more, and that the effect lasts about three to four months, sometimes longer. For the masseter specifically, the Cleveland Clinic describes the change in jaw contour as developing gradually over the following weeks rather than at once.

Here is how those weeks commonly unfold, with the usual caveat that individual experience varies and none of this is a promise.

The first day or two bring little beyond possible tenderness or a small bruise at the injection points. Some people notice nothing at all and wonder whether anything was done. By the end of the first week the clench often feels softer; chewing something tough, such as a crusty roll or a steak, may tire the jaw sooner than usual. That chewing fatigue is the treatment working, and for most people it is mild, but it is worth knowing in advance so it does not alarm you.

Through weeks two to six, morning jaw ache and headaches typically ease for those whose symptoms were muscle-driven, and the angle of the jaw may look slightly less square. Clinicians often schedule a review around this point to check symmetry and smile movement and to note how much the muscle has responded.

From about the third month the effect begins to fade. Clenching force returns, and with it, for many, the symptoms. Whether and when to repeat is a decision for you and the prescribing clinician, weighing benefit, side effects and the open questions about long-term muscle change. Some people report that the interval between sessions lengthens over time; this is a common observation rather than an established finding, and it should not be assumed.

What the first weeks with a night guard usually look like

A new guard is an intruder in the mouth, and the mouth responds accordingly. The first few nights commonly bring extra saliva, a lisp if you talk before taking it out, and a sense of bulk that makes falling asleep harder. Most people adapt within a week or two, which is why dentists usually ask for a fair trial before judging comfort.

The protective effect does not need an adaptation period. From the first night, grinding happens against plastic rather than enamel. What changes over the following weeks is how the jaw feels in the morning. Some people notice less ache almost immediately; others notice no change in pain and only the reassurance that their teeth are being spared. Both are normal outcomes, and the second one is a useful signal that muscle-focused options may be worth raising at the next visit.

Fit checks matter in this window. A custom guard is usually reviewed after the first week or two so the dentist can adjust high spots, confirm the bite is even and make sure the appliance is not rocking. Report any new tooth sensitivity, a bite that feels different during the day, jaw joint clicking that was not there before, or sores on the gums. These are fixable fit problems when caught early and avoidable bite changes if ignored.

Cleaning is a daily habit: cold water and a soft brush, never hot water, which can warp the material. Keep the case dry and away from pets, who find these appliances irresistible.

Over months and years, the guard wears. Grooves, thinning and cracks show where the force lands. Bring it to every checkup. A guard that wears through quickly is itself diagnostic: it tells the team the clench is unusually strong, and that is precisely the situation in which the question of masseter injections becomes a reasonable one to put on the table.

Masseter Botox side effects and night guard risks, stated plainly

Both options are generally considered low-risk when done well, but neither is risk-free, and the risks differ in kind.

For botulinum toxin, the Mayo Clinic lists pain, swelling or bruising at the injection site, headache or flu-like symptoms, and, depending on the muscles treated, effects such as a crooked smile or drooling if the toxin reaches neighboring muscles. In the masseter, the specific concerns are chewing fatigue, a smile that pulls unevenly if the muscles that lift the mouth corner are affected, and occasional hollowing of the cheeks when the muscle shrinks more than expected. These usually settle as the effect wears off, but “wears off” means months, not days.

Rarely, the toxin spreads beyond the treated area. The Mayo Clinic advises calling a doctor right away for muscle weakness anywhere in the body, vision problems, trouble speaking or swallowing, breathing difficulties, or loss of bladder control after an injection. These are uncommon, and they are the reason the treatment should be given by a trained clinician in a setting equipped to respond.

Night guards carry quieter risks. An ill-fitting appliance, especially a bulky over-the-counter one that covers only the front teeth, can allow the back teeth to drift and change the bite over months. Soft guards can, in some people, encourage chewing on the appliance, which may increase muscle activity rather than reduce it. Guards that are not cleaned harbor bacteria and can irritate gums. For people with undiagnosed sleep apnea, a guard that repositions the jaw backward may in theory affect the airway, another reason the breathing screen comes first.

Weighed honestly, the guard’s risks are mostly about fit and hygiene and are easily corrected; the injection’s risks are mostly about anatomy and spread and are low in experienced hands but not reversible on demand. That asymmetry is part of why guidelines place them in the order they do.

What else helps: stress, sleep, medicines and daily habits

Neither a guard nor an injection touches the reason the jaw is clenching, which is why both the NHS and the Mayo Clinic put a set of non-device measures alongside them.

Stress and anxiety sit at the top of most cause lists, and the NHS points to cognitive behavioral therapy, relaxation techniques and addressing sleep problems as useful routes. The Mayo Clinic adds biofeedback, a method in which sensors show you in real time how tense your jaw muscles are so you can learn to release them, and behavior change for awake bruxism: noticing the clench during the day and consciously resting the jaw with lips together, teeth apart and tongue resting on the roof of the mouth. People who clench at a desk often find a small sticky note on the monitor does more than any gadget.

Lifestyle factors are modifiable. The NHS lists alcohol, smoking and caffeine, especially in the evening, as contributors, and reducing them is a reasonable first experiment.

Medicines deserve a careful word. Some antidepressants, particularly SSRIs, are associated with bruxism, and the Mayo Clinic notes that a doctor may consider adjusting treatment. That is a conversation for the prescriber; stopping or changing a prescribed medicine on your own can cause harm. Short courses of muscle relaxants are occasionally used at bedtime for severe sleep bruxism, again under medical direction, and medicines for anxiety or stress may be discussed when those are driving the clench. This article describes the categories so you know what might come up, not to suggest any of them.

Finally, treat the sleep disorder if there is one. When sleep apnea is identified and managed, grinding often changes, and the whole guard-versus-injection calculation may shift. The jaw is frequently the messenger rather than the problem.

What people often get wrong

Several beliefs circulate so widely that they deserve direct correction.

“A night guard trains you to stop grinding.” It does not. The Cleveland Clinic is explicit that guards protect teeth rather than stop the behavior. If grinding fades over time while wearing one, the credit usually belongs to changes in stress, sleep or medicines.

“Botox stops bruxism.” Also no. It weakens the clench. Grinding episodes continue, with less force. People who stop wearing their guard after injections because they feel “fixed” may still be wearing down enamel, more slowly.

“If my jaw looks slimmer, the treatment worked.” A slimmer contour and symptom relief do not always arrive together. The contour change is a side effect of reduced muscle use; the relevant outcome for bruxism is pain and function, and the two should be judged separately.

“Over-the-counter guards are the same as dental ones.” The NHS acknowledges pharmacy guards exist but notes a dentist-made one fits better. Fit is what prevents bite changes, so the difference is clinical, not cosmetic.

“Once is enough.” Botulinum toxin wears off, with the Mayo Clinic citing roughly three to four months. Any plan involving it is a repeating plan, and the open questions about long-term muscle change belong in the first conversation, not the fifth.

“Children need guards or injections.” The Mayo Clinic notes that bruxism in children is common and usually resolves on its own. Pediatric management is overwhelmingly about reassurance, sleep routines and monitoring, with devices reserved for specific situations a pediatric dentist identifies.

“It’s just a dental problem.” The associations with sleep apnea, reflux, anxiety and certain medicines mean bruxism often has a medical story behind it. A dentist spots the wear; a doctor may be the one who finds the cause.

Questions to ask your care team before choosing

A good consultation about masseter botox vs night guard should answer the following. If it does not, ask.

• Which is my main problem right now: tooth wear, jaw and muscle pain, headaches, or the shape of my jaw? Which option addresses that specifically?
• Do I grind mainly in my sleep, clench during the day, or both? Does that change your recommendation?
• Have I been screened for sleep apnea or another sleep disorder, and should I be before we go further?
• Could any medicine I take be contributing, and who should review that with me?
• If a guard is recommended, what type and why, how will the fit be checked, and how will we know when it needs replacing?
• If injections are discussed, what is the realistic goal, how long do effects typically last in your experience, what are the specific side effects for the masseter, and what is known and unknown about repeating treatment over years?
• Is this an off-label use where I live, and what does that mean for how the decision is documented and followed up?
• Who will give the injections, what training do they have in jaw anatomy, and what is the plan if something goes wrong?
• Would combining a guard with injections make sense for me, or is that unnecessary?
• What non-device measures, such as stress management, sleep changes or biofeedback, should run alongside either option?
• How will we measure whether the treatment is helping, and when will we review?
• What would make you advise against either option in my case?

Write the answers down. The most useful thing you can bring to the second appointment is not a preference but a clear description of what has and has not changed since the first.

When to call your doctor

Most bruxism is uncomfortable rather than dangerous, and most treatments for it cause nothing worse than a few days of tenderness. A small number of situations should prompt a prompt call rather than a wait-and-see approach.

After botulinum toxin injections, contact a doctor straight away, or seek emergency care, if you notice any of the following, which the Mayo Clinic flags as possible signs of the toxin spreading beyond the treated area:

• Muscle weakness anywhere in the body, especially beyond the jaw
• Trouble swallowing, speaking or breathing
• Vision changes, such as blurred or double vision, or drooping eyelids
• Loss of bladder control
• A spreading rash, swelling of the lips or throat, or any sign of an allergic reaction

These can appear hours to weeks after injection, so the timeframe does not rule them out.

With or without treatment, see a dentist or doctor soon if you have:

• Jaw pain that is severe, worsening or stops you opening your mouth normally
• A jaw that locks open or closed, or a joint that clicks painfully and persistently
• A cracked, broken or newly loose tooth, or a filling or crown that has come away
• Facial pain with fever, swelling or redness, which can indicate infection
• Headaches that are new, severe or different from your usual pattern
• Loud snoring, witnessed pauses in breathing, gasping during sleep or marked daytime sleepiness alongside grinding

Call sooner rather than later if a guard causes mouth sores, a bite that feels wrong during the day, or new tooth sensitivity, since these are usually fit problems that are simple to correct early.

In every case, the decision about what to do next, including whether to start, repeat, pause or stop any treatment, rests with the dentist or doctor who knows your history. This article explains the options; it does not choose between them for you.

Frequently asked questions

Does Botox stop teeth grinding completely?

No. Botulinum toxin injected into the masseter reduces the force of the clench, but it does not switch off the brain’s drive to grind, so episodes continue at lower intensity. Many people report less jaw pain and fewer tension headaches as a result. Tooth surfaces may still wear, which is why clinicians often keep a night guard in use alongside injections.

Is a night guard for teeth grinding better than masseter injections?

They solve different problems. A guard protects teeth and restorations from wear and is the standard first step in Mayo Clinic and NHS guidance. Injections target muscle pain, headaches and an enlarged masseter when simpler measures have not helped. For tooth wear, a guard is usually essential; for muscle-driven pain, injections may be discussed as an addition rather than a replacement.

How long does masseter Botox last?

The Mayo Clinic reports that botulinum toxin effects typically begin within one to three days and last about three to four months, sometimes longer. For the masseter, the softening of the jaw contour builds over several weeks, per Cleveland Clinic guidance. As the effect fades, clenching force and symptoms usually return, so repeat treatment is a decision to revisit with the prescribing clinician each time.

What are the masseter Botox side effects I should expect?

Common effects include tenderness or bruising at the injection points, headache and tiredness when chewing tough foods. Less often, the toxin reaches nearby muscles and causes an uneven smile or cheek hollowing, which settles as the effect wears off. Rarely, weakness spreads further and causes trouble swallowing, speaking or breathing; these are emergencies and need immediate medical attention.

Can I use a night guard and masseter injections together?

Yes, and many clinicians prefer it when both tooth wear and muscle pain are present. The guard continues to shield teeth from whatever grinding persists, while the injections reduce the force behind it. Whether the combination is appropriate for you depends on your symptoms, dental history and any medical conditions, and it is a decision for your dentist and doctor together.

Will a night guard change my bite or move my teeth?

A well-fitted, full-coverage guard made by a dentist should not. Poorly fitting appliances, especially bulky over-the-counter ones that cover only some teeth, can allow other teeth to drift over months. Report any daytime change in how your teeth meet, new sensitivity or jaw clicking promptly; these are usually fit problems that are easy to correct when caught early.

Why do I grind my teeth at night in the first place?

Sleep bruxism is a sleep-related movement disorder with several contributors. The NHS lists stress, anxiety, sleep problems, certain medicines such as SSRIs, and alcohol, smoking and caffeine. The Mayo Clinic adds links with sleep apnea, acid reflux and family history. Because the cause often sits outside the mouth, a doctor’s review can be as useful as any device.

Is masseter Botox for bruxism an approved treatment?

In most regions bruxism is not among the licensed uses of botulinum toxin, so prescribing it for grinding is an off-label decision made by a clinician on the basis of available evidence and your individual situation. The Mayo Clinic describes it as an option that may help some people with severe bruxism not helped by other treatments. Ask how this affects follow-up where you live.

Can children have a night guard or masseter injections for grinding?

Children’s bruxism is common and, according to the Mayo Clinic, usually resolves on its own as they grow. Management is mostly reassurance, sleep routines and monitoring by a pediatric dentist. Guards are reserved for specific situations the dentist identifies, and botulinum toxin is generally not used for bruxism in children because the jaw is still developing.

What should I do if my jaw still hurts after wearing a night guard?

Tell your dentist. Persistent pain despite consistent guard use suggests the problem is the muscle or the joint rather than the tooth surface, and that changes the conversation. The team may check the fit, review sleep and stress factors, screen for sleep apnea, consider a medicine review with your doctor, or discuss muscle-focused options such as biofeedback or injections.

References

• NHS: Teeth grinding (bruxism)
• Cleveland Clinic: Teeth grinding (bruxism)
• MedlinePlus: Bruxism

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.