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Jawline Slimming or also known as masseter Botox is an excellent treatment to help stop the masseter muscles from contracting helping ease the effects from teeth grinding- as well as improve facial symmetry and facial shape. Learn more about massester Botox in our London clinic below, how masseter Botox works, what masseter Botox is and masseter Botox results below.
Watch the video below to see a full Botox Jawline Slimming procedure from start to finsih with consultation and before and after results.
Massester Botox is a non-surgical cosmetic treatment aimed at stopping the masseter or jalwine muscle located at the corners of the jawline from contracting. By stopping the masseter muscle this helps patients suffering from teeth grinding, as the masseter is the muscle responsible for teeth grinding, protecting the teeth as well as preventing headaches often associated with teeth grinding. Massester Botox is also an excellent cosmetic treatment for patients wishing to slim down their jawline for a more heart shaped face as well as improve facial symmetry.
Masseter Botox works by injecting Botulinum Toxin or Botox into the corner of jawline next to the ear lobe where the masseter muscle is located. By doing this, Botox temporarily stops muscle contraction and movement for up to 6 months. Top-ups and repeat treatment is recommend to continue enjoying the benefits of masseter Botox. Jawline slimming occurs from the masseter muscle shrinking in size since it no longer contracts and therfore can not grow in size.
At VIVA Skin Clinics, we know our clients appreciate a deeper understanding of how our treatments work and come to our experts for clinically led treatments.
Let’s explore the medical science behind masseter Botox and how it helps ease jaw tension.
When Botox (botulinum toxin) is carefully injected into the masseter muscle, it works to:
This holistic approach is what makes masseter Botox such a transformative treatmnet for clients seeking relief from jaw tension—combining therapeutic benefits with additional jawline slimming benefits.
At VIVA masseter Botox and jawline slimming is £400 with our associate nurses and doctors and £500 with our medical director Dr. Rupert Critchley. This includs a free top-top and consultation. Results can been seen after 4 weeks of treatment and slowly improve over the next few months.
Masseter Botox lasts up to 6 months with the appropriate dosing and should improve over the course of 12 months with additional retreatment. Masseter Botox is not permanent—routine treatment is required to maintain results.



Masseter Botox is a cosmetic and therapeutic treatment involving injections of Botox (botulinum toxin type A) into the masseter muscles, which are located on each side of the jaw and play a key role in chewing. This treatment can help reduce the size of the masseter muscles, resulting in a slimmer jawline, while also alleviating issues related to teeth grinding (bruxism) and jaw tension. Here’s a clear outline of the procedure:
The practitioner examines your jawline and masseter muscles to determine the best injection sites and dosage.
You discuss your health history to check for any contraindications to Botox.
You establish treatment goals, whether for aesthetic purposes or therapeutic relief.
The injector marks areas on each side of the jaw for the injections.
The area is cleaned, and a numbing cream may be applied to minimize discomfort.
Using a fine needle, the practitioner injects Botox directly into the masseter muscle. The number of injections depends on your specific needs.
The dosage varies but typically ranges from 20 to 60 units per side.
Patients should not massage the area to prevent migration of the Botox.
Strenuous exercise should be avoided for at least 24 hours to reduce the risk of bruising.
Mild soreness may occur, and ice packs can help. Over-the-counter pain relievers can be taken, avoiding blood thinners like aspirin.
Results generally last 3 to 6 months, after which maintenance sessions are advisable for continued benefits.
There are several jawline treatment options available that help reshape and slim the face. Botox is an excellent choice for non-surgical, immediate results; however, there are also options for surgery and dermal fillers to the cheeks, which can help reshape and balance the face, creating the illusion of a slimmer lower face without directly treating the jawline.
At VIVA we offer the best masseter Botox in London with two convenient locations in London. To book in a free Jawline Slimming or Masseter Botox appointent you can book online or call us at 02037332199.
18 Cleveland Street W1T 4HZ London
T: 02037332199
Nearest Tube Stations:
Oxford Circus 10 minutes
Goodge Street: 5 Minutes
Tottenham Court: 10 Minutes
T: 02037332199
Nearest Tube Stations:
Fulham Broadway Station 5 Minutes