One of the most common concerns I hear from patients is, “I feel like my face looks too wide or bloated, even when I’m not gaining weight.” Some are seeking a more contoured jawline. Others come in because of chronic teeth grinding, tension headaches or pain from clenching their jaw.
Face and jaw slimming injections are a non-surgical treatment that can help with both appearance and function. A true intersection of cosmetic medicine and therapeutic relief.
What Causes a Wide or Puffy Jawline?
There are several reasons your lower face may appear fuller:
Genetics and bone structure
Water retention or general weight fluctuations
Enlarged masseter muscles (the chewing muscles) due to grinding or clenching
Tension in the temporalis muscle, located at the temples, which contributes to facial tightness and some headaches
While healthy eating and exercise can improve general swelling, they often have little effect on muscle-related fullness, especially if you grind your teeth or clench your jaw in your sleep.
What Are Jaw Slimming Injections?
Jaw slimming injections work by targeting specific facial muscles, primarily the masseter and temporalis, using a muscle-relaxing agent. By softening these muscles over time, the face becomes more tapered and tension is reduced.
This treatment is especially helpful for:
Patients with a square or heavy jawline from muscle bulk
Those experiencing bruxism (teeth grinding) or jaw tension
Individuals suffering from headaches or migraines linked to TMJ (temporomandibular joint) strain
The goal is not to freeze the face, but to create subtle softening where overactivity is causing discomfort or cosmetic imbalance.
Aesthetic and Medical Benefits
- Facial Slimming
Softening of the masseter muscles results in a more refined, V-shaped jawline over time. This is ideal for those who feel their face looks wide or boxy in the lower third. - Migraine and Headache Relief
In patients who suffer from chronic headaches — especially those waking with head pain, tight temples, or facial tenderness — reducing tension in the temporalis and masseter can provide significant relief. While it is not a cure for migraine, many of my patients report fewer or less intense headache days following treatment. - Relief from Jaw Clenching and Teeth Grinding
Night-time grinding (bruxism) can cause damage to the teeth, pain in the jaw, and ongoing discomfort. For patients who already use a mouthguard but still wake with symptoms, injections can help reduce the muscular activity causing the problem.
The Muscles We Target
The two primary muscles I assess when treating jaw tension or facial bulk are:
Masseter:
Located at the angle of the jaw, this muscle is responsible for chewing and is often overactive in grinders or clenchers.
Temporalis:
A broad, fan-shaped muscle on each side of the head, above the ears. It works with the masseter and is a common site of tension in patients with stress-related headaches.
What to Expect From the Procedure
Jaw slimming injections are quick, taking around 10–15 minutes. Discomfort is minimal and there is little to no downtime. Most patients return to work or normal activities immediately.
Timeline of Results:
Subtle changes start within 1–2 weeks
Full results are visible around 4–6 weeks
Relief from tension or grinding may begin even sooner for some
Effects typically last between 3 to 6 months
Repeat treatments help maintain both the cosmetic and functional benefits. I review each patient individually to ensure we are not overtreating or compromising natural movement.
Frequently Asked Questions
- Can this help with migraine?
Yes! In some cases. If your migraines are related to jaw tension or grinding, relaxing the masseter and temporalis muscles may reduce your symptoms. However, only neurologists can offer treatment for chronic migraine that is eligible for a Medicare rebate. My treatment is not claimable under Medicare, but many patients find relief from associated tension headaches and facial pain. - What if I already use a night guard?
A mouthguard protects your teeth but does not stop the muscles from clenching. If you wake up with jaw soreness or headaches despite using one, injections may help reduce the muscle activity causing your symptoms. - Will I still be able to chew and speak normally?
Yes. The goal is not to paralyse your muscles, but to gently reduce their activity. Most people do not notice any change in function, only in tension and bulk. - Is this a permanent solution?
No, the results are temporary. Treatments are generally needed every 4–6 months to maintain effect, though some patients find their muscles gradually become less active over time. - Is there a Medicare rebate for this treatment?
No. As a cosmetic physician, I cannot offer a rebate for these injections. Rebates for chronic migraine only apply when treated by a neurologist under strict criteria.
Who Is This Treatment For?
This treatment may be suitable for:
Patients with a wide or square jaw from muscle overactivity
Individuals who grind or clench their teeth
People experiencing TMJ discomfort or facial tension
Patients wanting a softer, more feminine jawline
Those suffering from headaches or facial pain related to muscle strain
Final Thoughts
Face and jaw slimming injections are not just about reshaping the face. They offer real relief from pain, tension and discomfort for the right patients. Whether your goals are aesthetic, therapeutic or both, my priority is to assess your individual anatomy and guide you toward the most appropriate treatment plan.
There is an art and a science to this work. My approach is always conservative, natural, and clinically sound.
If you are waking with jaw pain, struggling with teeth grinding, or simply want to refine your lower face, I would be happy to discuss your concerns in a consultation.
Dr Tina Fang
MBBS, FRACGP, Fellow of the Australasian College of Aesthetic Medicine
