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Jawline Slimming Treatment

Creating a slim jawline

Beautiful Smile

Jawline Slimming – or Masseters reduction for cosmetic purposes – is a simple yet effective procedure that involves the injection of the Neurotoxin Botulinum Type A into the large Masseter muscles to create a slim and more feminine jawline.

The masseter muscles are the muscles that are attached at the angle of your jaw and control all the movements related to chewing food. For some people, strong jaw muscles are part of their normal anatomy. However, for others a square jaw line is the result of a condition called Bruxism, which causes excessive teeth grinding or clenching.

With overuse from habitual teeth grinding, the masseter muscles become over developed and more pronounced, causing the shape of the lower face to alter and acquire that strong ‘square-jawed’ look (along with other painful and potentially more serious symptoms).

Bruxism can affect the Jawline and this is because clenching or grinding teeth is an involuntary movement, which we cannot control and can occur either while awake or asleep. The medical term for unconscious teeth grinding and jaw clenching is bruxism, and many people suffer with it for years without even realising it.

It is thought that 70% of grinding and clenching happens at night when we sleep, but it can also happen while we are concentrating or under stress. This causes a hypertrophic growth of the muscles attached to the jaw, called the masseters, and therefore a wider square-looking face.


Botulinum Toxin temporarily relaxes parts of this muscle. The relaxed parts atrophy (shrink) due to disuse. This face slimming treatment results in the decreases of the lower face width by reducing the masseter size. A proper examination of the lower face and masseter muscle size determines the dose and frequency of Botulinum Toxin injections.


This treatment is safely used for:

  • Teeth grinding

  • Reducing jaw ache & tension

  • Reducing headaches

  • Contouring wide square jaw

  • Balancing the upper and lower face shape


Most patients report thinning of the face and jaw as a result of treatment with botulinum toxin, while voluntary movements, such as chewing and facial expressions, are not affected by the procedure.

The procedure is highly effective, with minimal or no pain and absolutely no downtime at all. Face slimming and jaw reduction effect is seen at any time between 2 to 8 weeks.

The jawline slimming treatment can transform your face completely. In fact, people can go from having a square and masculine jaw, to a narrow and oval face in a matter of weeks.

Depending on the treatment recommended, you could start to see the results within three weeks.


Results typically lasts for three to four months. Sometimes a repeat treatment is needed 4-8 weeks later to ensure the best results, with a follow up six months after that.


Traditional treatments include anti-bruxism devices and medications, whereas recently neurotoxins such as Botulinum Toxin have been proven very helpful to provide relief from bruxism symptoms, including a square jawline. Injecting  neurotoxin Botulinum Type A, has proven to be an innovative treatment option for targeting and treating excessive muscle activity and spasticity.

Botulinum toxin can soften the appearance of the jawline, leading to dramatic changes in face shape after regular treatment. A slimmer jawline also results in more prominent cheekbones and chin, which are especially important for women, who typically want high cheekbones and a clean jawline.

Chin sculpting with filler can also enhance the jaw angle, which is why this treatment is often done in combination with the jawline slimming procedure.

Before & After Results

“Dr Chike was friendly & gentle and I had nice experience. I was happy with the result and the treatment wasn’t painful at all compared to other places!.”

- JinJolly78

“Dr Chike is extremely gentle, skilled and knowledgeable. He listened to my concerns and created a bespoke look on my face. I didn't get a single bruise - a bonus! Thank you so much, looking forward to seeing you again!"

- Justyna

“Dr Chike is very professional and puts you at ease. His technique is painless and results are great!”

- Xavier

“Can not praise Dr Chiké enough, he has been doing my Anti-wrinkle treatments  for years and I have alway been so happy with the results! I will never go to anyone else! Absolute genius at what he does”

- Chloe



Find the answers to your questions about jawline slimming with Hampstead Aesthetics.

If you would like to find out more, simply contact us for further information.

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