People come to us about their jawline in two ways. Some notice a square or wide lower face in photos and want a softer, slimmer look. Others wake with jaw tension or headaches from grinding and clenching. At Victorian Cosmetic Institute, we’ve offered doctor-led care since 2005, and one treatment can often address both the cosmetic and the functional side.
The right approach is always tailored after a proper assessment, and the goal is a subtle, natural change, never an overdone one.
What is jawline slimming?
Jawline slimming is a non-surgical treatment that softens a square or wide lower face, most often by reducing the size of overworked masseter (jaw) muscles. As the muscle gradually relaxes, the lower face slims and looks softer. The same treatment also eases teeth grinding and clenching, so it can address both the shape of your jaw and the tension that comes with an overactive muscle.
What causes a wide or square jawline?
A wide or square lower face can come from four main things, and identifying which applies to you is exactly what a consultation works out, because each has a different answer.
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Bone structure and genetics
A naturally broad or angular jawbone. This is skeletal and can’t be changed without surgery.
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Enlarged masseter muscles
The jaw muscles can grow larger with years of chewing, clenching, and grinding, widening the lower face. This is the most treatable cause.
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Fat or skin laxity
Fullness or heaviness along the jawline from fat or loosening skin, rather than muscle.
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Age-related change
Shifts in skin, fat, and support over time that soften and widen the lower-face outline.
Who gets masseter enlargement?
Masseter enlargement is common in people who clench or grind their teeth, often at night without knowing, as well as heavy gum chewers and those with naturally strong jaw muscles. It affects both men and women.
Which treatment suits which jawline concern?
Because a wide jaw has different causes, the right treatment depends on what’s driving yours. This section points you to the right answer rather than selling one treatment for everything.
| Cause | What it looks like | The right approach |
|---|---|---|
| Enlarged masseter muscles | Square, wide lower face from muscle bulk | Masseter treatment (covered on this page), which relaxes the overworked muscle so the lower face slims |
| A recessed chin | Jaw looks wider from the front | Chin enhancement, which balances the lower face and can make the jaw appear slimmer |
| Jowls or skin laxity | Lower-face heaviness along the jawline | Jowl reduction or skin tightening, which sharpen the jawline border without slimming muscle |
| Bone structure | Naturally broad or angular jawbone | Honestly can’t be changed by non-surgical treatment, and we’ll tell you if that’s what’s driving your jaw shape |
Recommended jawline slimming treatments in Melbourne
At VCI, the primary treatment for a muscle-driven wide jaw is masseter treatment, described below. Where muscle isn’t the cause, the right approach differs, which is what the guide above helps you work out.
Masseter muscle treatment
Masseter muscle treatment is the primary, non-surgical option for a square or wide jaw caused by enlarged masseter muscles. A small amount of a prescription muscle-relaxing medicine is injected into the masseter, the main chewing muscle at the angle of the jaw. Over the following weeks, the overworked muscle gradually relaxes and reduces in size, softening and slimming the lower face.
Because the same overactive muscle is often behind teeth grinding and clenching, the treatment also eases jaw tension, grinding, and the headaches that can come with it. So it addresses both the shape of your jaw and the function behind it, in one treatment.
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Best for
A square or wide lower face from muscle bulk, and grinding, clenching, or jaw tension.
If your jaw width has another cause
Chin enhancement
Where a recessed chin makes the jaw look wider from the front, restoring balance to the chin can bring the lower face into proportion and make the jawline appear slimmer.
Jowl reduction
Where heaviness or jowls along the jawline are softening its definition, targeted treatment can sharpen the lower-face border without slimming the jaw muscle.
NS face shaping
A whole-of-face approach that improves overall balance and proportion, where jaw width is one part of the bigger picture rather than the sole focus.
Where loosening skin is softening the jawline, non-surgical tightening firms and redefines the lower-face contour without affecting the muscle.
The most effective treatment for jawline slimming
The most effective treatment depends entirely on what’s driving the width. Muscle responds to masseter treatment, laxity to tightening, proportion to chin balance, and bone structure honestly can’t be changed without surgery. Working out which applies to you is exactly what the consultation determines, so the plan is matched to your anatomy rather than a single default answer.
What about buccal fat removal?
Buccal fat removal is a surgical procedure that removes the fat pads in the cheeks, which is a different thing from slimming an overworked jaw muscle. It’s sometimes discussed for a slimmer face, but it isn’t always the right answer for lower-face width, and it addresses the cheeks rather than the jaw. If muscle bulk is driving your jaw width, masseter treatment is the more targeted, non-surgical option. A consultation is the place to work out which, if either, suits you.
Benefits of masseter treatment
- 1 A softer, slimmer lower face that still looks like you
- 2 Relief from teeth grinding, clenching, and jaw tension
- 3 Fewer tension headaches for some people
- 4 Non-surgical, with no downtime and a quick treatment
- 5 Gradual, natural-looking change rather than a sudden one
Who is jawline slimming for?
Masseter treatment suits adults with a square or wide lower face caused by enlarged jaw muscles, and those who grind, clench, or wake with jaw tension. It’s a good option whether your concern is cosmetic, functional, or both. Suitability is always confirmed at a consultation, where we check that muscle, rather than bone or fat, is what’s driving your jaw shape.
Jawline slimming for men
Masseter treatment is popular with men who want a slimmer, more defined lower face, or who grind and clench. The approach is tailored to preserve a naturally masculine jawline, softening excess width without feminising the face. Many men also come for the functional relief from grinding and jaw tension.
Who it’s not for
We’re honest about when treatment won’t help. If your wide jaw is caused by bone structure, masseter treatment won’t change it, and we’ll tell you so rather than treat you anyway. Treatment is also deferred during pregnancy or breastfeeding, and with certain muscle or nerve conditions. Any contraindications are checked at your consultation.
What to expect at your jawline slimming consultation
Your first visit is a consultation, not a treatment. It’s a chance to work out what’s actually driving your jaw shape and decide together what makes sense, with no pressure to proceed. Here’s what happens:
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Assessment of your jaw and face
We examine the jaw muscles, bone structure, and skin to identify what’s causing the width.
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Understanding the cause
Working out whether it’s muscle, bone, fat, or laxity, because each has a different answer.
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An honest discussion of your options
What will help, what won’t, and whether treatment is right for you.
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A tailored plan
Matched to your anatomy and your goals, whether cosmetic, functional, or both.
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Aftercare and reviews
Support and progress tracking after treatment.
Results from masseter treatment
Masseter treatment works gradually. As the muscle relaxes, most people notice easing of grinding and jaw tension within a week or two, while the visible slimming of the lower face develops over several weeks as the muscle reduces in size. Results are not permanent and are maintained with repeat treatment over time, as the muscle gradually returns to its previous strength. How long results last varies between individuals.
Individual results vary. A consultation is required to determine treatment suitability.
Downtime and recovery
Masseter treatment involves little to no downtime. You can return to your normal day straight away. Some people notice mild tenderness at the injection sites or a slightly different chewing sensation as the muscle adjusts, both of which settle quickly.
Bruxism, teeth grinding and jaw clenching
Bruxism is the medical term for grinding your teeth or clenching your jaw, often during sleep and often without realising it. Over time it can wear down teeth, cause jaw pain and tension headaches, and enlarge the masseter muscles, which is part of why grinding and a wider jaw so often go together. Because masseter treatment relaxes the overactive muscle, it can ease the force of grinding and clenching, reducing jaw tension and the headaches that come with it, while also slimming the jaw.
For many people, this functional relief is the main reason they come in, with the cosmetic change a welcome bonus. Masseter treatment works well alongside a dental night guard, which protects the teeth while the treatment reduces the muscle force behind the grinding. If you grind or clench, your consultation will look at both the muscle and whether other support, such as a night guard, would help.
Preventing masseter enlargement
You can’t always prevent a strong jaw muscle, but a few things help reduce the clenching and grinding that enlarge it over time.
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Become aware of clenching
Many people clench through the day without noticing. Simply catching yourself and relaxing the jaw helps.
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Manage stress
Stress is a common driver of clenching and grinding, so managing it can ease the habit.
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Use a night guard
If you grind in your sleep, a dental night guard protects your teeth and reduces the strain on the muscle.
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Ease off hard chewing
Frequent gum chewing or very chewy foods work the muscle harder, so easing off can help.
How much does jawline slimming cost?
The cost of masseter treatment depends on the amount of product needed, which varies with the size and strength of your jaw muscles, and whether you’re treating for cosmetic slimming, functional relief, or both. Because everyone’s muscles are different, the amount required varies from person to person. At your consultation, we’ll assess your jaw and give you a clear idea of the cost before you decide, with no pressure to proceed.
Results are maintained with repeat treatment over time, so it’s worth thinking of it as an ongoing rather than one-off cost.
Safety, risks and side effects
Masseter treatment is generally well tolerated when performed by experienced doctors. Common side effects are usually mild and temporary, and can include tenderness or bruising at the injection sites, and occasionally a temporary change in your chewing or smile as the muscle adjusts. More significant effects are uncommon. Because the treatment uses a prescription medicine, Australian regulations mean it can’t be advertised by brand name, which is one reason a consultation matters, so the treatment can be properly assessed and explained in person. Your doctor will discuss the specific risks with you before you begin.
Meet our doctors
Victorian Cosmetic Institute is a doctor-led practice, founded in 2005 by Dr Gavin Chan (MBBS, registration MED0001175745). Our multidisciplinary team brings together doctors, cosmetic nurses, and skin therapists, working to the same considered, measurement-led philosophy. Every treatment plan is guided by genuine clinical experience and a focus on natural-looking results that age well.
“Good cosmetic medicine starts with good information.”
Why choose VCI for jawline slimming
- 1 Doctor-led care since 2005, two decades of experience
- 2 One treatment that addresses both jaw shape and teeth grinding
- 3 An honest approach: we treat muscle, and tell you when bone or fat is the cause
- 4 Subtle, natural-looking results that preserve your natural jawline
- 5 A multidisciplinary team and consultation-led plans with complimentary reviews
What our patients say
Our patients regularly share their experience of the care and service they receive with us.
How does jawline slimming work?
Jawline slimming works by relaxing the masseter, the main chewing muscle at the angle of the jaw. A prescription muscle-relaxing medicine is injected into the muscle, which gradually reduces in size over several weeks, softening the lower face. It also eases grinding and clenching driven by the same muscle.
How long does masseter treatment last?
Results are not permanent. The effect gradually wears off over several months as the muscle returns to its previous strength, so treatment is repeated to maintain results. How long it lasts varies between individuals, and your doctor will advise on timing at your consultation.
Does masseter treatment help with teeth grinding?
Yes. Because grinding and clenching are driven by the masseter muscle, relaxing it reduces the force behind them, easing jaw tension and the headaches that can come with grinding. Many people come for this relief as much as the slimming, and it works well alongside a night guard.
Will jawline slimming change my smile or chewing?
Occasionally, some people notice a temporary change in their smile or chewing sensation as the muscle adjusts, which settles as the treatment takes effect. Treating conservatively reduces this, which is one reason it should be done by an experienced doctor.
Is jawline slimming suitable for men?
Yes. Masseter treatment is popular with men, both for a slimmer lower face and for relief from grinding. The approach is tailored to preserve a naturally masculine jawline, softening excess width without feminising the face.
How much does masseter treatment cost?
The cost depends on the amount of product needed, which varies with the size and strength of your jaw muscles. At your consultation, we’ll assess your jaw and give you a clear idea of the cost before you decide.