Maybe someone has already offered you Botox for your jaw. Or maybe you went looking for it after years of a jaw that won’t let go.
We do offer it. We just use it rarely, and almost never as the first step.
Here’s why. Botox turns a muscle down. It does nothing about what’s been turning that muscle up. So for most people, the most useful thing it gives is information, not a fix.
What it does
Botox is injected into the two big muscles that close your jaw: the masseter, at the back corner of your jaw, and the temporalis, at your temple. It weakens how hard they can squeeze. For muscles that have been overworking for years, that can bring real relief.
It wears off, usually in a few months. Then the muscle gets its strength back, and the symptoms often come back too. So you either repeat it, or you use it to buy time while you work on the cause.
Botox is one brand of botulinum toxin type A. The studies below used several brands at different doses, which is part of why the research is hard to compare.
It answers a question
If turning the muscle down makes your symptoms go away, your symptoms were coming from the muscle. That’s worth knowing. It doesn’t mean you’re done.
A good response doesn’t mean Botox is the treatment. It means the muscle is the source, so the next job is finding out what’s overloading it and changing that. Skip that step and you’re back in a few months with the same problem.
Muscle or joint? We check first
Jaw pain comes from one of two places. Muscle pain comes from the jaw muscles working too hard. Joint pain comes from the jaw joint itself: a slipped disc, arthritis, or other wear inside the joint. They can feel the same, so we tell them apart with a hands-on exam.
That matters because Botox only reaches the muscle. For problems inside the joint, there’s very little evidence it helps. Muscle pain vs. joint pain is the decision that shapes everything else. We hold buccal massage to the same standard.
What the research shows
| Used for | Evidence |
|---|---|
| Shrinking an enlarged masseter | Good. The best-supported use |
| Jaw pain from the muscles | Mixed. Many studies beat placebo, some didn’t |
| Problems inside the joint | Very little. Not enough to recommend it |
Delcanho R, Val M, Guarda Nardini L, Manfredini D. Botulinum toxin for treating temporomandibular disorders: what is the evidence? J Oral Facial Pain Headache. 2022;36(1):6-20. A review of 24 randomized trials, with only 411 treated patients in all and wide differences in dose and injection sites.
The edge over placebo fades. Compared with a saltwater injection, Botox lowered pain and bite force at one and three months. By three to six months, the bite-force difference was gone. Higher doses helped pain more.
Chen Y, Tsai CH, Bae TH, et al. Effectiveness of botulinum toxin injection on bruxism: a systematic review and meta-analysis of randomized controlled trials. Aesthetic Plast Surg. 2023;47(2):775-790.
Against a night guard, it’s about a tie. A 2026 review of 36 studies found no real difference in pain between a splint and Botox for grinding. Botox sometimes worked faster at first. The reviewers still preferred the splint when protecting the teeth matters.
Aldosari LIN, Chauhan E, Kaur K, et al. Occlusal splints versus botulinum toxin for the management of clinical sequelae associated with adult sleep bruxism: a systematic review and meta-analysis. Cranio. 2026. Published online ahead of print.
So for pain, Botox isn’t clearly better than an appliance. The appliance also protects your teeth and doesn’t wear off. That’s the main reason we don’t start with Botox. More on night guards here.
What we’ve seen here
It has gone both ways in our patients. A few had one or two rounds, the cycle broke, and they never needed more. That’s what we’re aiming for. Another patient prefers to come in every four to six months because it keeps the symptoms in check. That’s a fair choice, as long as it’s made knowing it’s ongoing relief, not a cure.
These are a handful of our own patients, not study results.
Why it’s rarely the first step
Botox only releases the muscle. Release on its own fades, whether it comes from a needle or from hands-on massage. In the buccal massage trials, people who also got education and self-care did better at one year than people who got the massage alone.
Kalamir A et al., 2010, 2012 and 2013, discussed on our buccal massage page.
So before Botox, we usually look at:
- Which problem you have. Daytime clenching and nighttime grinding are different, and many people have only one.
- Your nose. If you can’t breathe through it, your jaw can’t rest the way it should.
- Hands-on release. Buccal massage works on the same muscles with no needle, and it shows you where you hold tension.
- Retraining. Myofunctional therapy with Dr. Lee-Mirzayan changes how your tongue, lips and jaw rest.
- Your sleep. Snoring, waking up tired or being told you stop breathing is a conversation that starts with a physician. Here’s what we do and don’t do.
When we do use Botox, it usually goes alongside that work. It buys you a window. What you do with the window decides whether you need another round.
Before you decide
- The cost repeats. Each round lasts a few months. Decide up front whether you’re breaking a cycle or signing up for ongoing visits.
- Chewing gets weaker, on purpose. That’s how it works. Most people adjust. If you eat a lot of tough or chewy food, you’ll notice.
- The muscle can bulge oddly. In one report of 46,250 masseter injections, about half of one percent of patients came back with a problem. Most were bulging, where an untreated part of the muscle takes over. All of the problems went away, in about five months on average.
- Years of repeat injections haven’t been studied. That isn’t proof of harm. It’s just unknown, which is one more reason we’d rather break a cycle than keep one going.
Nishikawa A, Aikawa Y, Kono T. Treatment of masseter muscle hypertrophy with botulinum toxin type A injection: a review of adverse events. J Cosmet Dermatol. 2024;23(11):3544-3550. A look-back study that only counts people who returned, so the true rate is likely higher.
If you want a slimmer jaw
This is what Botox does best. Inject an enlarged masseter and it shrinks.
But a big masseter is a muscle that has been working hard for years, and your teeth have been taking that force the whole time. It usually shows up as wear on the teeth first. So if this is why you’re asking, we’ll want to look at your teeth and joints in the same visit.
What the visit involves
- A hands-on jaw exam to find which muscles are sore and whether the joints are part of it.
- Often a CBCT, a 3D X-ray, so we can see the jaw joints and the bone around them.
- When it happens: day, night or both.
- A look at your teeth for wear, cracks and failing fillings.
- Questions about breathing and sleep, with a referral if needed.
- Photos and a 3D scan of your teeth, so we can compare later.
Then we talk about what Botox would be for, how long it lasts, and what should happen alongside it. Sometimes something else should come first. Sometimes a round or two is a good way to find out if the muscle is the problem.
If clenching has already damaged teeth, we rebuild them once the load is under control, with bonding or a crown. A new crown in an unchanged bite fails the same way the tooth did.
Ask us about it
If you’re thinking about Botox, or someone has suggested it, bring it up. We’ll tell you honestly whether it’s the right tool, and sometimes the answer is “not yet.”
Call 702-734-0776 or tell us what’s going on.
General education, not a substitute for an exam.