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The Blog Masseter Injections: What Are They and How Do They Work?

Anti-wrinkle injections, when used for masseter injections, work by introducing a purified protein into the masseter muscle. This protein temporarily relaxes the muscle, reducing its activity and size. It’s like hitting the pause button on the muscle’s hyperactivity. Now, you might wonder how this relates to slimming the face.

The masseter muscle is one of the major muscles involved in chewing. Over time, factors like genetics, teeth grinding, and excessive chewing can cause the masseter muscle to become larger and more prominent. This can lead to a square-shaped jawline, which might not be the desired look for everyone.

When the anti-wrinkle injections are carefully administered into the masseter muscle, they prevent the muscle from contracting as forcefully. This leads to a gradual reduction in the muscle’s size over time. Think of it like deflating a balloon – as the muscle becomes less active, it gradually becomes slimmer and less bulky. 

As the masseter muscle relaxes and shrinks, it contributes to a more subtle, oval-shaped face. The jawline appears softer and more streamlined, which can create a more feminine or youthful appearance. It’s essentially a way to sculpt and contour the face without surgery or invasive procedures. 

It’s important to note that the effects of these anti-wrinkle injections are temporary and typically last for several months. Maintaining the desired look might require follow-up treatments. Also, the procedure should always be performed by a qualified medical professional who has experience with facial anatomy and administering injections safely. 

So, in a nutshell, masseter injections using anti-wrinkle injections work by relaxing and reducing the size of the masseter muscle, leading to a slimmer and more refined appearance of the face. It’s like a subtle touch-up that can help you achieve your desired facial contour. 

What Do Masseter Injections Do?

Masseter injections can be helpful in managing symptoms of temporomandibular joint disorder (TMJ) by targeting the masseter muscle, which plays a significant role in jaw movement. TMJ disorder is a condition that can cause pain and discomfort in the jaw joint and surrounding muscles. While masseter injections might not be a cure for TMJ, they can provide relief and improve the condition in certain cases. 

Here’s how masseter injections can help with TMJ:

Muscle Relaxation. The masseter muscle is one of the muscles involved in chewing and jaw movement. When this muscle is overactive or tense, it can contribute to the symptoms of TMJ, such as jaw pain, clenching, and grinding. Masseter injections work by relaxing the muscle, which can help alleviate muscle tension and reduce painful symptoms associated with TMJ.

Reduced Grinding and Clenching. Many people with TMJ unconsciously clench their jaws or grind their teeth, especially during sleep. Masseter injections can help decrease the intensity of these actions by temporarily weakening the masseter muscle. This reduction in grinding and clenching can lead to less strain on the jaw joint and decreased discomfort. 

Improved Jaw Function: By relaxing the masseter muscle, masseter injections can improve jaw function and mobility. This can make activities like talking, chewing, and yawning more comfortable for individuals with TMJ.

Pain Relief. TMJ often causes pain in the jaw, face, and even the neck and shoulders. Masseter injections can help alleviate pain by reducing muscle tension and decreasing the pressure on the jaw joint. This can lead to a significant reduction in discomfort for those suffering from TMJ-related pain.

Combine with Other Treatments. Masseter injections can be used in conjunction with other TMJ treatments, such as physical therapy, oral appliances, and lifestyle modifications. This multi-faceted approach can provide comprehensive relief and improve overall TMJ management.

It’s important to note that while masseter injections can be beneficial for some individuals with TMJ, they might not be suitable or effective for everyone. If you’re experiencing symptoms of TMJ, it’s essential to consult a healthcare professional, preferably one with expertise in treating TMJ disorders. They can assess your condition, recommend appropriate treatments, and determine if masseter injections are a suitable option for your specific case. 

Why Are More People Getting Masseter Injections?

The growing popularity of masseter injections can be attributed to their dual benefits of enhancing facial aesthetics and addressing functional concerns. 

Social media and the emphasis on facial symmetry have fuelled an increased desire for well-defined jawlines, making masseter injections an appealing option for achieving a more sculpted and balanced appearance without invasive surgery. 

The minimally invasive nature of the procedure, often requiring minimal downtime, resonates with individuals seeking quick cosmetic enhancements in their busy lives. 

Additionally, heightened awareness of temporomandibular joint (TMJ) issues and teeth grinding has led to an upsurge in people seeking relief through masseter injections. 

As more individuals recognise the potential of these injections to relax the overactive masseter muscle, alleviate jaw tension, and reduce TMJ-related discomfort, their interest in this non-surgical solution has grown. 

This broader understanding of the medical benefits beyond aesthetics has contributed to the increasing trend of people opting for masseter injections to improve both their appearance and overall wellbeing. 

What’s Involved in Masseter Injectables?

A masseter injections treatment is a rejuvenating journey for your jawline. Guided by a skilled professional, tiny and virtually painless injections delicately relax your masseter muscle, giving your face a graceful contour. In just one very straightforward and easy appointment, you’ll unlock a refined, more slender appearance that’s subtly stunning. 

Your treating Cosmetic Doctor or Senior Cosmetic Injector will first apply a topical anaesthetic (numbing cream) to the area where you’ll be injected to ensure your utmost comfort. 

Once this takes effect, your clinician will ask you to clench and unclench your jaw to assist them in locating the masseter muscle with precision. 

This will also enable them to assess the degree of muscle bulk that has formed per side of your face, as this can sometimes be different for each side. Some patients find that their clenching or tension is stronger on one side. 

Your clinician can then administer the correct quantity of muscle-relaxing injectable for your exact requirements. 

Whether you’re dreaming of a softer jawline or relief from jaw tension, this is a quick and effective procedure that offers a natural slimming effect to the width of the lower face. 

How Long Do Masseter Injections Last?

The results of masseter injections typically last around 4 to 6 months, though individual experiences can vary. 

While many patients choose to refresh their results with this frequency of every 4–6 months, you can also choose to stop having repeat treatments at any time. 

Some people may find their jaw muscle will begin to get bulky again, or they will feel tension returning to their jaw, at which point they simply resume having their masseter injections. 

Factors influencing the longevity include metabolism, lifestyle, and the unique response of your body. For some patients, their masseter muscles are more overactive than in other people. 

Some may enjoy extended effects beyond the six-month mark, while others might notice the effects slightly waning earlier. People with faster metabolic rates might find the results fade a bit sooner, while those with slower metabolisms could relish in the benefits for a more extended period.

Regular maintenance sessions can help sustain your desired results. It’s essential to remember that while the effects might diminish, the procedure’s charm lies in its flexibility — you can adjust your treatment schedule to fit your evolving preferences and needs. 

Consulting a medical professional can provide tailored insights into how long the outcomes of masseter injections might last for you. 

Choosing Contour Clinics for Masseter Treatment

Contour Clinics provides Masseter Treatment at all our clinic locations; Newtown, Five Dock, Castle Hill and Miranda in Sydney, and Stones Corner in Brisbane. 

We welcome patients for a complimentary, no-obligation consultation with one of our Cosmetic Doctors or Senior Cosmetic Injectors, so you can learn more about what your masseter treatment will involve, and what to expect from your results. 

Here at Contour Clinics, treatment for masseter muscles is performed only by highly experienced and qualified Cosmetic Doctors and Senior Cosmetic Injectors, who are skilled and experienced in administering injectables with precision, skill and utmost safety. 

Our clinicians treat each patient as an individual, tailoring treatment to your unique requirements. 


Your treatment at Contour Clinics comes with: 

  • Complimentary consultation with your Cosmetic Doctor or Senior Cosmetic Injector
  • Fully qualified, experienced and knowledgeable clinician performing your treatment 
  • Premium TGA-approved product used, guaranteed 
  • Gold standard, industry-leading techniques used 
  • Complimentary follow-up appointment to review results 
  • Complimentary top-up, if required 

Talk to our friendly patient care team! We are happy to answer any questions you may have about masseter injections. 

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