Masseter Botox is a powerful and versatile treatment that targets the large, square-shaped masseter muscle on each side of your face—the muscle that helps you chew. Known as masseter Botox, this procedure offers both aesthetic and medical benefits, from slimming a broad jawline to reducing the symptoms of bruxism and TMJ disorder.
At our clinic in London, Masseter Botox is performed with careful anatomical precision. Whether you want to manage teeth grinding or are seeking jawline slimming, this treatment is highly effective and minimally invasive. The masseter muscle is located at the angle of the jaw, and overdevelopment due to chronic clenching or chewing can result in a wide or boxy face shape. Injecting Botox into this muscle reduces its activity and size over time, leading to therapeutic relief and aesthetic contouring.
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The masseter muscle is one of the most powerful muscles in the body. It’s located at the angle of your jaw and plays a vital role in chewing. However, the masseter muscle can become overdeveloped from excessive use—often associated with teeth grinding or jaw clenching (bruxism). Masseter Botox weakens the masseter by blocking nerve signals with a botulinum toxin injection, helping the muscle relax and shrink in volume. Botox offers a safe, targeted approach to reducing both the size and tension in this area.
One of the most common reasons patients benefit from Botox is for bruxism, TMJ dysfunction, and chronic jaw pain. The overactive masseter muscle can lead to discomfort, clicking, headaches, and worn-down teeth. During a masseter Botox consultation, Dr. Bela assesses muscle function and jawline tension. Botox is injected directly into the masseter muscle to provide relief and prevent further damage. Patients often report significant improvements in symptoms and quality of life.
A prominent jaw can make the lower face appear wider and more angular. Over time, repeated clenching can cause the jaw muscle to bulk up—a condition known as masseter muscle hypertrophy. Botox for this purpose is often called jawline slimming or facial slimming. Botox weakens the masseter, allowing it to reduce in size gradually. This softens the jawline, enhances facial proportions, and can even change your face shape for a more contoured look. Botox can slim the jawline without surgery, downtime, or disruption to your daily routine.
The amount of Botox used varies depending on the strength and size of each masseter muscle. On average, between 25 to 50 units per side are required. Injecting Botox into this muscle at the correct depth and location is key to achieving results without compromising facial expression or function. Dr. Bela uses refined techniques to deliver a precise dose of Botox for jawline slimming.
Botox is an injectable muscle relaxant, and when it’s injected into the masseter, it does not affect nearby facial expression muscles or interfere with chewing when administered properly. Some patients are concerned about their smile or functional movement. Dr. Bela ensures that the botulinum toxin is placed exactly into the masseter muscle, avoiding diffusion to adjacent areas. Normal chewing and smiling are preserved while still achieving effective slimming or therapeutic outcomes.
Like any injection, some common side effects of Botox include temporary bruising or swelling at the injection site. Other minor side effects such as tightness or asymmetry are rare when performed by an experienced injector. The effects of Botox typically become noticeable within 1–2 weeks and continue to improve over the following month. Masseter Botox is not permanent, but it does offer lasting relief and jawline refinement with regular maintenance.
Dr. Bela has extensive experience in both the aesthetic and medical applications of botulinum toxin into the masseter. Each masseter Botox procedure begins with a full consultation, facial muscle assessment, and discussion of your goals—whether it’s TMJ relief, slimming the lower face, or both. The botulinum toxin injection is placed directly into the masseter muscle using high-precision anatomical knowledge. Our London clinic is known for safe, effective Botox treatments that enhance natural beauty and improve functional symptoms.
Over the years, Dr. Bela has identified multiple melanomas on aesthetic patients—often in areas they hadn’t noticed themselves. In one notable case, during a Botox consultation, he spotted a small but suspicious lesion on a patient’s forehead. When reviewing previous treatment photos, it became clear that the melanoma had gradually developed over time, becoming increasingly visible across sessions. Despite its small size, the lesion was already an early invasive melanoma—but was thankfully detected in time. This case is just one of several examples highlighting how melanoma can remain hidden in plain sight. For this reason, Dr. Bela now offers a discounted mole check for all existing aesthetic patients, making it easier to combine cosmetic care with life-saving early detection.
All masseter Botox injections at the Chiswick Clinic are carried out by Dr. Bela, a dermatologist with over 15 years of experience in administering medical and cosmetic botulinum toxin injections. His methodical and personalised approach ensures each treatment is safe, effective, and tailored to your facial anatomy and goals.
Masseter Botox is used to treat teeth grinding (bruxism), jaw clenching, TMJ dysfunction, and for cosmetic jaw slimming.
Masseter Botox typically lasts 3 to 5 months. Continued treatments are required to maintain jawline slimming or muscle relaxation.
The effects of Botox begin within a week, but full jawline changes usually take 4 to 6 weeks to become noticeable.
The procedure involves a few quick injections into the masseter muscle. Most patients find it very tolerable with minimal discomfort.
Yes. By shrinking an overactive masseter, Botox can also change your face shape and create a more balanced appearance.
The benefits of masseter Botox include jaw pain relief, reduced tooth grinding, and facial slimming. Side effects include mild bruising, swelling, or tightness—usually temporary.
Contact Chiswick Clinic today for your masseter Botox consultation. Whether you’re looking to relieve bruxism symptoms, reshape your jawline, or explore facial slimming treatments, we’re here to offer the best masseter Botox care in West London.
