How Masseter Botox® Can Help Stop Bruxism

Saniyya Mahmood • August 7, 2025

Quick take: Bruxism can apply forces up to six times your normal bite, leading to jaw pain, headaches and tooth wear. Masseter Botox® relaxes overactive jaw muscles to reduce grinding and clenching.

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You might not even realise you're doing it. Night after night, your jaw works overtime, grinding and clenching with a force that can exceed your normal bite strength by up to six times. This unconscious habit, called bruxism, affects millions of people who wake up with sore jaws, headaches, and the gradual wear of their teeth, often wondering why they feel so tired despite a full night's sleep.

The hidden nature of bruxism makes it particularly frustrating. You can't simply tell yourself to stop something you're not aware you're doing. One effective treatment option is masseter Botox®, backed by clinical research and offering genuine hope for better sleep and less pain.


Masseter muscle and masseter botox injection sites

What Is Bruxism and Why Does It Happen?

Bruxism encompasses both teeth grinding and jaw clenching, which can occur during waking hours or sleep. The condition shows differently for each person—some experience nocturnal grinding, whilst others clench during stressful daytime moments.

Common drivers include:

  • Stress and anxiety (often linked to daytime clenching)
  • Sleep disorders and certain medications (more common in sleep bruxism)
  • Genetic predisposition

The Hidden Costs of Teeth Grinding

The consequences can extend far beyond a sore jaw. Chronic bruxism may cause:

  • Worn enamel, cracked teeth, and loose fillings
  • Temporomandibular joint (TMJ) issues: clicking, locking, or persistent pain that can radiate to the neck and shoulders
  • Morning headaches, earaches, and disrupted sleep

The muscular tension from overactive jaw muscles can create a cycle where pain leads to more stress, which loops back into the bruxism.

How Masseter Botox® Works for Bruxism

The masseter muscles, located on either side of your jaw, are among the strongest in your body. When they become hyperactive, they create excessive force that damages teeth and strains the TMJ. Botulinum toxin (Botox®) temporarily relaxes these overactive muscles.

When injected into the masseter muscle, Botox® blocks the nerve signals that cause excessive contractions. This doesn't eliminate normal jaw function—you can still chew, speak, and smile naturally. It reduces the intensity of unconscious grinding and clenching during sleep or stress.

Some patients come to us for bruxism treatment for the wanted side effect of a slimmer jawline. The repeated clenching action may cause the jaw muscles to build up and affect the facial contours. Read more about jawline slimming below.

The Science Behind the Treatment

A 2022 trial found that low-dose masseter Botox® reduced muscle activity and pain symptoms in nocturnal bruxism, with effects lasting around three months and participants reporting significant improvement.

By reducing the force exerted during grinding episodes, masseter Botox® helps protect teeth from further damage whilst allowing inflamed jaw joints to settle. A 2019 review concluded that botulinum toxin can effectively control the muscular overactivity seen in bruxism in both therapeutic and cosmetic contexts.

What to Expect from Bruxism Botox® Treatment

  • Consultation: Assessment of jaw muscles and discussion of symptoms.
  • Procedure: Injections typically take a few minutes; most patients report minimal discomfort.
  • Onset: Gradual reduction in jaw tension within the first week; full effect by two weeks.
  • Benefits often reported: Better sleep quality, reduced morning jaw pain, and fewer headaches.

Treatment Duration and Results

Effects usually last three to four months. As muscle activity returns, symptoms may recur; regular maintenance can help manage chronic bruxism, though response varies.

Important: This is an off-label use. Botox® is approved for medical indications but not specifically licensed for bruxism. Clinical evidence supports its effectiveness, and many clinicians consider it a valuable option for severe cases.

Is Masseter Botox® Right for Your Bruxism?

Best for people with moderate to severe symptoms that have not responded to night guards or stress management alone.

Your practitioner will consider:

  • Symptom severity and masseter muscle strength
  • Medical history and treatment goals
  • Combination approaches (e.g., stress reduction, dental appliances)

Who should avoid it? Pregnant or breastfeeding women, people with certain neuromuscular conditions, or those on specific medications. A thorough consultation is essential.

Patient waking up refreshed

Professional Bruxism Treatment at Aesthetica Medical

If you're dealing with persistent jaw pain, worn teeth, or disrupted sleep, a professional assessment can determine the best approach. Aesthetica Medical(Leeds & Cheshire) offers comprehensive consultations that consider both your symptoms and lifestyle.

We focus on understanding your individual experience, assessing muscle tension, and planning treatment specific to your needs. Our experience with masseter Botox® means you’re treated by practitioners who understand both the technique and the day-to-day impact of bruxism.

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Further Reading

Medical information disclaimer: This content is for general information only and is not a substitute for personalised medical advice. Always consult a qualified practitioner.

We are dedicated to providing you with the highest quality care and achieving optimal results. Book in for an appointment to see how we can help with your concerns.

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