Masseter treatment at Core Aesthetics uses prescription anti-wrinkle injectable product to temporarily reduce the activity and over time the bulk of the masseter muscle at the jaw angle. This can slim the lower face in clients with muscle-related jaw width, and significantly reduce discomfort from teeth grinding and clenching.
The masseter is one of the primary muscles of mastication, the muscles responsible for chewing, and it is one of the strongest muscles in the body relative to its size. It runs from the cheekbone down to the angle of the jaw, and for some clients it is enlarged either through habitual clenching and grinding of the teeth (bruxism) or simply due to naturally prominent muscle development. In both cases, injectable treatment can address the concern effectively in suitable candidates.
At Core Aesthetics in Oakleigh, masseter treatment is assessed by Corey Anderson, AHPRA registered nurse (NMW0001047575), individually for each client. The treatment goals, dosing approach and expected outcomes for masseter differ meaningfully from other anti-wrinkle areas and are assessed and explained accordingly during your consultation.
What Masseter Treatment Addresses
Masseter treatment can be appropriate for two primary concerns. The first is lower face width related to masseter muscle bulk. When the masseter is hypertrophied (enlarged), whether from habitual grinding and clenching or from natural development, it creates a wider, squarer lower face at the jaw angle. Reducing masseter activity over time with prescription injectable product causes the muscle to reduce in bulk, slimming the lower face width progressively over several weeks following treatment.
The second concern is jaw tension, discomfort and the consequences of bruxism. Habitual clenching and grinding can cause significant jaw tension, headaches particularly on waking, and dental wear over time. Reducing masseter muscle activity reduces the force with which clenching and grinding occur, which many clients find meaningfully reduces associated discomfort. This is not a substitute for a dental assessment if there is concern about dental damage, and your practitioner may suggest discussing with your dentist in addition to considering masseter treatment.
How the Treatment Works
Masseter treatment uses a prescription anti-wrinkle injectable product administered at multiple points into the belly of the masseter muscle on each side. When the muscle receives reduced nerve signalling, it contracts with less force. Over weeks, the reduced workload causes the muscle to reduce in bulk. This is the same physiological principle as muscle atrophy from reduced use, occurring at a controlled and predictable rate.
The visual slimming effect develops gradually and is typically noticeable at four to six weeks following treatment. The effect on grinding and clenching discomfort is often noticed sooner. Duration for masseter treatment is typically longer than for expression line treatment areas, reflecting the lower movement demands on the masseter compared with muscles like the frontalis or orbicularis oculi.
Masseter Treatment and the Lower Face as a Whole
Masseter treatment is sometimes considered alongside jawline and chin filler as part of a coordinated lower face approach. They address fundamentally different concerns. Masseter treatment reduces width by reducing muscle bulk. Jawline filler adds structural definition to the jaw border. In some cases a combination of both produces the most balanced result: a slimmer jaw width combined with improved jaw angle definition. Your practitioner will assess whether one or both approaches are relevant to your individual situation during your consultation.
You can read more about the full range of anti-wrinkle treatment areas at Core Aesthetics on our anti-wrinkle treatments page.
Located in Oakleigh, Serving Melbourne’s South East
Core Aesthetics is at 12A Atherton Road, Oakleigh VIC 3166. Accessible from Carnegie, Chadstone, Murrumbeena, Huntingdale, Bentleigh and Clayton. Open Tuesday to Saturday by appointment.
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Frequently Asked Questions
How long does masseter treatment last?
Duration varies between individuals. The effect on muscle bulk develops gradually and typically lasts longer than expression area anti-wrinkle treatment. Your practitioner will discuss realistic timeframes.
Can masseter treatment help with teeth grinding?
Yes, in suitable candidates it can reduce the force of clenching and grinding, which may reduce associated discomfort. It is not a substitute for a dental assessment.
Will masseter treatment affect my ability to chew?
A correctly dosed treatment should not significantly affect your ability to chew. Treatment is always dosed conservatively at Core Aesthetics.
How is masseter treatment different from jawline filler?
Masseter treatment reduces jaw width by reducing muscle bulk. Jawline filler adds structural definition using dermal filler. They address different concerns and may be combined.
How do I book masseter treatment in Melbourne?
Book online via our booking page or call 0491 706 705. Core Aesthetics is at 12A Atherton Road, Oakleigh VIC 3166. Open Tuesday to Saturday by appointment.
AHPRA Registration: NMW0001047575 (Nurse, registered since January 1996) | Core Aesthetics, Oakleigh VIC 3166
All prescription treatments are assessed and administered by an AHPRA registered health practitioner. Suitability is determined individually at consultation.
Clinical References
General Information Only. This article is general in nature and does not replace a consultation with a qualified health practitioner. Treatment outcomes, suitability and risks vary by individual. Any medical or prescription treatment options can only be discussed and provided where clinically appropriate following an individual assessment. Last reviewed March 2026 by Corey Anderson, Core Aesthetics.