Women & Men
Jawline slimming injections
Slim your lower face and jawline with jawline slimming injections. This safe and effective treatment reduces the size of enlarged jaw muscles. Its a great option for people with a square lower face, those who want a slimmer, heart-shaped face, and for people who want to look more feminine.
Jawline slimming injections can also alleviate teeth grinding, jaw clenching, TMJ pain, and headaches.
Treatment takes 5 mins. No downtime.
Minimal discomfort. Numbing available.
Result within 6 weeks.
To maintain look, revisit every 6-9 months.
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Muscle slimming injections
How it works
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Each jawline slimming treatment is perfectly tailored to you.
Book this treatment through muscle slimming injections.
The price depends on the amount of product used.

Get clarity on your treatment in our info hub.
We want to answer any possible questions you may have.
If you can’t find the answers to your questions, get in touch with the clinic and we will get back to you as soon as we can.
Cosmetic Connection is a dedicated jawline slimming injection clinic in Melbourne and Sydney. Our clinic excels in providing a first-class service, and our cosmetic doctors are some of the most experienced in the country.
We offer a purely bespoke approach to jawline slimming injections in Sydney and Melbourne, and will work with you to understand your concerns and develop a bespoke treatment plan to achieve your aesthetic goals.
If you want tailored jawline slimming treatment in Sydney and Melbourne, choose the cosmetic doctors at Cosmetic Connection.
We can use jawline slimming injections to slim your face and jawline without surgery.
Muscle slimming injections reduce the strength and size of your jawline masseter muscles. This results in a slimming effect to your lower face.
Jawline slimming injections are a non-surgical treatment designed to reduce the width of your jawline and lower face. They work by relaxing and reducing your masseter muscles.
The treatment also improves teeth grinding and jawline clenching.
Jawline slimming injections relax the masseter muscles at the back of your jawline.
Relaxing the masseter muscles causes them to reduce in size over 6 weeks. This results in a slimming effect to your lower face and jawline.
Jawline slimming injections have a very high satisfaction rate for people concerned about their square and wide face-shape. It’s also popular with people who suffer from teeth grinding and jaw clenching.
Yes, jawline slimming injections are an effective treatment option for people who suffer from bruxism. The treatment reduces the strength of your masseter muscles, alleviating teeth grinding.
For severe cases, we can also use temple slimming injections.
Jawline slimming injections are an effective treatment for jaw clenching.
Jaw clenching usually results from overdeveloped masseter muscles. Jawline slimming injections relax these muscles, reducing their strength and alleviating jaw clenching.
Jawline slimming injections are a great treatment option for people:
- With a square or round lower face due to overdeveloped masseter muscles
- Who suffer from tooth grinding, jaw clenching, headaches, and TMJ pain
- Who want a slimmer and more tapered lower face
We recommend that you get jawline slimming injections 2-3 times per year. Consistent maintenance increases the longevity, so with time you can increase the interval between treatments.
Facial slimming injections and jawline slimming injections are the same treatment. ‘Jawline slimming injections’ is the correct name. This is because ‘facial slimming’ encompasses a range of treatments like cheekbone fillers and chin fillers that give your face a more tapered shape.
Jawline slimming injections and masseter injections are the same treatment. The masseter muscles are the treatment target of jawline slimming injections.
Bruxism is a medical condition characterised by teeth grinding, gnashing and jaw clenching. It can occur both during the day and night, and at times of stress.
It can cause permanent damage to your teeth, chronic headaches and a square lower face.
Bruxism is usually caused by overactive masseter muscles. The masseters are the paired muscles at the back of your jawline that help you to chew. Severe cases of bruxism can also involve the temporalis muscles above your ears.
Bruxism is most effectively treated with jawline slimming injections. Jawline slimming injections reduce the strength of the masseter muscles. We can also treat the temporalis muscles in severe cases.
Reducing the strength of the masseter and temporalis muscles is an effective treatment for bruxism.
It can also give your face a slimmer shape by reducing the width of your lower face.
The masseters are the paired muscles located at the back of your jawline on each side. They can be felt when you clench your teeth and chew.
You do not have to wait for the masseter muscles to return to their pre-treatment size before another jawline slimming treatment. Repeat the treatment when you notice the muscle bulk returning, or when your teeth grinding and jaw clenching symptoms begin to return.
Consistent maintenance of your jawline slimming injections can increase the longevity of your result.
There are a few options to achieve a slimmer-looking jaw. They include:
- Weight loss for those who are slightly above their normal weight, and where there is excess fat in the lower cheek
- Jawline slimming injections to reduce the size of your masseters muscles at the back of the jawline
- Fat reduction treatments such as liposuction to reduce unwanted fat on your lower cheeks
The best ways to slim your lower face and jawline naturally include:
- Weight loss for those who are slightly above their normal weight and who carry fat in the lower cheeks
- Avoid chewing gum and tough food (such as over-cooked meat)
- Make a conscious effort during the day to avoid clenching your jaw
If despite trying to slim your face naturally you are struggling to see a difference, jawline slimming injections are an options. They are quick, convenient, and have no downtime.
Yes, anti-wrinkle injections can give your jawline and lower face a slimmer appearance. Anti-wrinkle product has a muscle-relaxing property.
When injected into the masseter muscles of your jawline, they are known as muscle slimming injections. They relax the masseters and reduce their size. This has a slimming effect on the face and jawline.
Chewing gum can make your jawline larger and more square because you are exercising your masseter muscles.
Most people achieve a great result with 1 jawline slimming treatment.
If you have larger and stronger masseter muscles, you may need additional treatments to achieve your goals.
Yes, jawline slimming injections are a great option for people with a square face.
Jawline slimming injections improve a square face by relaxing the masseter muscles at the back of your jaw. Once relaxed, the masseters reduce in size, slimming your lower face.
Yes, jawline slimming injections can improve a round face. By reducing the size of the masseter muscles at the back of the jawline, we can give your face a slimmer shape.
You can combine jawline slimming injections with cheekbone filler and chin filler for a more pronounced result.
Yes, jawline slimming injections improve headaches caused by hyperactive masseter muscles. Overactive masseters generally cause headaches at the back of your jaw and in front of your ears.
Jawline slimming injections can be used to improve TMJ pain. By reducing the size and strength of your masseter muscles, less force is applied to your TMJ, alleviating some discomfort.
The extent of the treatment determines the cost of jawline slimming injections.
You can review general information about the current cost of jawline slimming injections on our pricing page.
Masseter injections and jawline slimming injections are the same treatment.
Jawline slimming injections have minimal discomfort. We use tiny needles, and have a range of numbing options to significantly reduce discomfort.
Jawline slimming injections are a very simple procedure.
After your comprehensive consultation, we clean and mark the back of your jawline.
Using tiny needles, we carefully place muscle slimming injections to your masseter muscles. There is usually 3-4 injections per side.
Jawline slimming injections take less than 5 minutes to perform.
To minimise discomfort from jawline slimming injections, we use tiny needles, and have strong numbing options available. Prescription numbing gel is usually the most effective pain relief option for jawline slimming.
Most people describe the feeling of jawline slimming injections as a dull ache. This sensation only occurs during the injections which generally take less than 1 minute per side.
Yes, you are able to undergo jawline slimming injections and jawline filler in the same appointment.
Yes, you can undergo jawline slimming injections and double chin fat injections in the same appointment.
The number of units needed to slim your jawline depends on the size and strength of your masseter muscles, and the brand of product used.
Most people need 20-40 Irish or German units per side to achieve a satisfactory result. If the French product is used, then you will need 50-100 units per side to achieve the same result.
The final result from jawline slimming injections is seen in 6 weeks.
If used for teeth grinding and jaw clenching, the result is seen in 2 weeks.
Jawline slimming injections last 6-12 months on average. The longevity depends on the size and strength of your masseter muscles, and the amount of muscle-slimming product injected.
You can increase the longevity of your result by having regular maintenance treatments.
Jawline slimming injections give the lower face a slimmer appearance. They do not improve jawline definition. To improve jawline definition, we use jawline fillers.
Jawline slimming injections are very unlikely to permanently slim your jawline. If you have consistent treatments for many years, there is a small chance your masseter muscles won’t return to their pre-treatment size.
Jawline slimming injections wonly work for people with large masseter muscles.
If you have a wide lower face from fat, sagging, or a prominent jaw bone, the treatment will not work.
You can check if your jawline slimming injections are working by clenching your teeth and feeling the masseter muscles at the back of the jawline. If they feel softer than normal then the treatment has started working.
Jawline slimming injections start working in 3-4 days. The effect is strongest after 14 days, however it takes 6 weeks for your jawline to slim down.
Prepare for jawline slimming injections with these steps:
- Cease all supplements 1 week before your treatment (unless taking for medical reasons)
- Avoid excessive alcohol for 24 hours before your treatment
- Attend your appointment without makeup
- Closely shave the planed treatment areas the day before where applicable
After undergoing jawline slimming injections you may notice slight redness at the injected areas. This will generally resolve within an hour.
3-5 days after your treatment, the effect will start to kick in. This with bruxism will notice their symptoms continue to improve with the full effect seen in 14 days.
Over 6 weeks, your jawline will gradually slim down.
After undergoing jawline slimming injections you should avoid:
- Excessive alcohol
- Intense exercise
- Applying makeup to the treated area
- Firm pressure on the injected area
You can resume regular activity the day after your jawline slimming injections.
Yes, you will be able to chew your food and eat normally immediately after jawline slimming injections.
Weakening the masseter muscle should not affect your ability to eat as your face has other chewing muscles.
Jawline slimming injections are a safe treatment.
Visiting an experienced, doctor-led cosmetic clinic is the best way to ensure that your jawline slimming injections are performed as safely as possible.
The most common side effect from jawline slimming injections is mild redness. This settles within an hour.
Rare risks of jawline slimming injections include smile weakness and muscle bulging. These both resolve on their own, and we can treat muscle bulging with a touch up treatment.
Yes, jawline slimming injections can weaken the smile. This is very rare, and usually very subtle.
It occurs if the product inadvertently affects the nearby risorius muscle.
If you notice a change in your smile after having jawline slimming injections, it will not be harmful and will resolve on its own.
There are a number of precautions taken to minimise the risk jawline slimming injections affecting the smile. They include:
- Ensuring that the product is injected deeply into the correct muscle.
- Placing the injections no closer than 1cm to the front border of your masseter muscles.
Jawline slimming injections can worsen jowls in people who are developing sagging skin.
If you still want to have jawline slimming injections for aesthetic reasons, or to treat bruxism, then we can combine the treatment with jawline filler to prevent sagging.
You will be able to eat normally after jawline slimming injections. While jawline slimming injections work by relaxing the masseter muscles (that help you chew), there are other muscles also used for chewing.
The following groups are not suitable for jawline slimming injections:
- Aged under 18
- Currently pregnant or breastfeeding
- Those who have a larger lower face due to excess lower cheek fat or a prominent jaw bone (mandible) and who are seeking treatment for aesthetic purposes
- People with unrealistic expectations about what can be achieved with jawline slimming injections

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