If you’re looking for a more contoured jawline without surgery or downtime, Masseter Botox could be the subtle yet powerful solution you've been searching for. At Mesglo Aesthetic Clinic London, we use precision Botox injections into the masseter muscles to slim and sculpt the lower face, creating a more refined silhouette — especially popular with clients wanting a softer or more V-shaped appearance.



Here’s everything you need to know about Masseter Botox for jaw slimming — how it works, who it’s for, and what to expect before, during, and after your treatment.



What Is the Masseter Muscle?



The masseter muscle is one of the main muscles used for chewing, located at the back of the jaw. In some people — especially those who grind or clench their teeth (bruxism) — the masseter can become overdeveloped, leading to:



🔹 A wider or squarer jaw 🔹 Tension headaches or facial pain 🔹 A more masculine lower face, which may not match your aesthetic goals



By relaxing this muscle with Botox, we can achieve both functional relief and a cosmetic slimming effect.



How Does Masseter Botox Slim the Face?



Botulinum toxin (Botox®) works by temporarily relaxing the masseter muscles, reducing their bulk over time. As the muscle shrinks due to reduced use, the outer jawline becomes:



✨ More contoured and tapered✨ Less square or boxy✨ Softer and more feminine (or refined for men)



This is especially effective for patients with a naturally wide jaw, or those who have developed muscle bulk from teeth grinding or clenching.



Who Is Masseter Botox For? https://mesglolondon.co.uk/masseter-botox-for-jaw-slimming-what-to-expect/