Masseter Treatment
from £550
What is the Masseter Muscle?
The masseter is one of the most powerful muscles in the body, sitting on either side of the jaw and playing a central role in chewing and biting. For many people, stress, anxiety, or habitual jaw clenching causes this muscle to overwork and enlarge over time — a condition known as masseter hypertrophy. This can alter the shape of the face, create persistent jaw tension, and contribute to a range of uncomfortable symptoms including headaches and damaged teeth.
How is Masseter Botox Performed?
Masseter Botox involves a series of precise botulinum toxin injections directly into the masseter muscles on each side of the jaw. The treatment temporarily relaxes the muscle, reducing its size and strength over the following weeks. The appointment is quick, comfortable, and requires no downtime — results develop gradually and naturally over 4–6 weeks as the muscle softens and slims.
Medical Benefits
For patients suffering from bruxism (teeth grinding) or TMJ (temporomandibular joint) disorders, masseter Botox can be genuinely life-changing. By relaxing the overactive jaw muscles, the treatment can:
Reduce the intensity of teeth grinding — even during sleep — helping to protect teeth from long-term wear, cracking, and fracture. Relieve chronic jaw tension, facial pain, and associated headaches that can significantly impact quality of life. Alleviate the discomfort of TMJ disorders by decreasing the pressure placed on the jaw joint during clenching.
Cosmetic Benefits — Jaw Slimming & Facial Feminisation
From an aesthetic perspective, masseter Botox is one of the most effective non-surgical treatments for slimming and reshaping the lower face. Enlarged masseter muscles can create a wide, square jaw that many patients — particularly women — feel detracts from their natural features.
A key principle of facial feminisation is that the cheeks should appear wider than the jaw, creating a soft, tapered lower face. By reducing the size of the masseter muscles, we can restore this balance — allowing the cheekbones to become more prominent and the overall face shape to appear slimmer, softer, and more refined. The results are subtle but transformative.
FAQs
-
Masseter Botox may be the right treatment if you are experiencing any of the following:
Teeth grinding or jaw clenching (bruxism), chronic jaw pain, headaches, or facial tension, TMJ disorder or temporomandibular joint discomfort, a wide or square jaw you'd like to slim, facial asymmetry in the lower face, or a desire to feminise or refine your facial contours without surgery.
-
Discomfort is minimal. Most patients describe the sensation as a brief, mild pinch. The treatment is quick and well-tolerated, with no anaesthetic required and no downtime afterwards.
-
The appointment itself takes around 15–30 minutes, making it easy to fit into a busy schedule.
-
Results develop gradually over 4–6 weeks as the muscle relaxes and reduces in size. Many patients notice a significant improvement in both jaw shape and symptom relief within this time.
-
Results typically last between 4–6 months. With regular treatment, many patients find the effects last longer over time as the muscle becomes less active. Some patients also require fewer units to maintain their results.
-
Yes. Masseter Botox is a highly effective treatment for bruxism. By relaxing the overactive jaw muscles, it significantly reduces the intensity of grinding — even during sleep — helping to protect your teeth from long-term damage and relieve associated jaw pain and headaches.
-
Yes. Many patients with TMJ (temporomandibular joint) disorder experience significant relief following masseter Botox treatment, as relaxing the jaw muscles reduces the pressure and tension placed on the jaw joint.
-
Yes — for patients with enlarged masseter muscles, Botox can effectively slim and reshape the lower face. Results are subtle and natural-looking, creating a softer, more tapered jaw rather than a dramatic change.
-
Absolutely. Masseter Botox is one of the most popular non-surgical treatments for facial feminisation. By slimming the jaw, it allows the cheekbones to appear more prominent, creating the softer, more feminine facial proportions many patients are looking for.
-
The number of units varies depending on the size and strength of your masseter muscles. This will be assessed during your consultation, where Dr Karwal will recommend the most appropriate dosage for your individual needs.
-
Simply click the Book Now button at the bottom of this page or visit our Book Now page to schedule your consultation at Karwal Aesthetics, 15 Dover Street, London W1S 4LP.
We'll assess your concerns, answer your questions, and create a personalised treatment plan tailored to your goals.
-
Aesthetics, we use only the highest quality, clinically proven botulinum toxins — Allergan Botox, the world's original and most trusted anti-wrinkle injectable, and Relfydess by Galderma, an innovative next-generation toxin known for its fast-acting and long-lasting results.
During your consultation, Dr Karwal will recommend the most suitable product for your individual needs and goals, ensuring you receive the safest and most effective treatment possible.
-
Aftercare is straightforward. We recommend avoiding touching or massaging the treated area for 24 hours, refraining from strenuous exercise on the day of treatment, avoiding alcohol for 24 hours, and staying upright for at least 4 hours following your appointment. Full aftercare instructions will be provided at your appointment.