A heavy, squared jawline is often less about bone — and more about a muscle working overtime.
Clenching, grinding, and everyday stress can cause the masseter — the muscle at the angle of your jaw — to become overdeveloped, creating a squarer, heavier lower-face shape than your bone structure alone would suggest. It can also bring genuine discomfort: jaw tension, tooth wear, and tension headaches that build through the day.
Masseter slimming injections relax this muscle, easing tension at the source while gradually softening the jawline into a more tapered, refined contour. At Mira Story Aesthetics, we assess your jaw structure and muscle activity individually, so the result feels proportionate to your face — refined, never over-corrected.
Benefits of Masseter Slimming
- Softens a square or heavy jawline into a more tapered contour
- Eases jaw tension, clenching, and teeth-grinding (bruxism)
- Can relieve tension-related headaches linked to clenching
- Reduces visible muscle bulk at the angle of the jaw
- A dual-benefit treatment — cosmetic contouring and genuine muscle relief
- Gradual, natural-looking change with no surgery or downtime
- Results that develop gradually over weeks, never overnight or overdone
- A popular, low-commitment entry point into aesthetic treatments
Procedure Time
Around 20–30 minutes, making it an ideal lunchtime treatment.
Results
Jaw tension relief often felt within days; Visible contouring develops over 4–6 weeks.
Duration of Results
Typically lasts 4–6 months, with muscle bulk sometimes reducing further over repeated treatments.
Recovery
Minimal; most clients resume daily activities immediately.
Why Have This Treatment Here
Masseter slimming sits at the intersection of cosmetic contouring and genuine muscular relief, which means it needs to be assessed clinically, not just aesthetically. At Mira, our doctors evaluate your bite, muscle tone, and any signs of grinding before recommending a plan — ensuring treatment addresses both how your jaw looks and how it feels.
Results build gradually, which means there’s no dramatic before-and-after moment — just a jawline that quietly becomes more refined over the following weeks, alongside noticeably less tension.
Your Patient Journey
Your Consultation
Each masseter slimming journey begins with a thoughtful consultation where we assess your jaw structure, muscle tone, and any patterns of clenching or grinding before recommending a bespoke plan that addresses both contour and comfort.
Your Treatment
Using the lightest, most precise touch, injections are placed directly into the masseter muscle to ease tension while preserving normal chewing function. Comfort is prioritized throughout, and treatment is completed within minutes.
Your Aftercare
You can return to your routine straight away, avoiding heat exposure, strenuous activity, and vigorous chewing for the first 24 hours. Tension relief is often felt within days, while the tapering contour develops gradually over the following weeks.
Masseter Slimming FAQs
What exactly do these injections do?
The injections relax the masseter muscle at the jaw, easing the tension behind clenching and teeth-grinding while gradually softening the jawline into a more tapered, refined contour.
Which areas respond best to this treatment?
The masseter muscle at the angle of the jaw is the primary treatment area. It’s especially effective for those with a square or heavy jawline, or visible muscle bulk from habitual clenching.
Does it hurt?
Most clients describe only mild discomfort, similar to a light pinch. A fine needle is used throughout, and the treatment is completed within minutes.
When will I see the change?
Tension relief is often felt within days. The tapering, contouring effect on the jawline develops more gradually, typically becoming visible over 4–6 weeks as the muscle relaxes.
How long will the results last?
Results typically last 4–6 months. With regular maintenance, the masseter muscle can reduce in size over time, meaning some clients find they need treatment less frequently.
Can this help with jaw clenching or teeth grinding?
Yes — this is one of the treatment’s most valued benefits. By relaxing the overactive muscles, many clients experience noticeably less jaw tension, clenching, and associated headaches.
Can this be used to enhance the jawline?
Yes — by softening excess muscle bulk, masseter slimming can create a more elegant, tapered jawline, often used alongside neck treatments for full lower-face contouring.
Is this suitable for someone new to aesthetic treatments?
Yes. It’s a popular, low-commitment entry point into aesthetic treatments, with a natural-looking result, minimal downtime, and the added benefit of easing jaw tension.
Get in touch today
To get in touch with Mira, you can call +44 7423 245544 or book your appointment online.
Send Your Enquiry Today
- mira@storyaesthetics.uk
- 1 Lower Grosvenor Pl, London SW1W 0EJ, United Kingdom
- +44 7423 245544
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- Monday - Sunday, 10am - 8pm, by appointment only
Send Your Enquiry Today
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