Jaw Clenching and Bruxism Treatment in Marylebone
Jaw clenching and bruxism treatment in Marylebone, London uses muscle-relaxing injections in the masseter to ease the clenching force, the jaw pain, and the tension headaches that come with it. A slimmer, softer jawline follows over the weeks after — a welcome side effect, not the headline.
Book Consultation
What you're seeing
The concern
Bruxism is the involuntary clenching or grinding of your teeth — most commonly during sleep, and frequently driven by stress. Over months and years it produces a recognisable cluster of problems: morning jaw stiffness and pain, frequent tension-type headaches starting at the temples, audible grinding noted by a partner, flattening of the chewing surfaces of the teeth, and progressive enlargement of the masseter muscle that gives the jawline a square, bulky look.
The first-line dental management is a night-guard mouth-splint, which protects the teeth but does not stop the clenching itself. The aesthetic-medicine approach — muscle-relaxing injections into the masseter muscle — works at the level of the muscle: the injections reduce the contraction force, which directly reduces clenching intensity, eases the headaches and jaw pain, and over 6 to 12 weeks visibly slims the muscle and the jawline. Treatment lasts 4 to 6 months and is repeated as needed; with consistent treatment most patients find the interval lengthens and the underlying clenching reduces beyond what the treatment alone is doing.
Why it happens
What drives it
- Stress and anxiety — particularly chronic, low-grade, work-related stress
- Sleep disorders (e.g. sleep apnoea) where bruxism is a downstream symptom
- Caffeine, alcohol, and nicotine — all increase nocturnal clenching frequency
- Certain medications (SSRIs, stimulants) can increase clenching
- Misaligned bite or missing/restored teeth
- Genetic predisposition — bruxism runs in families
FAQ
Common
questions
Will masseter muscle-relaxing injections stop my grinding completely?
Not completely — but it significantly reduces the force of clenching, which is what drives the symptoms. Most patients report headaches and jaw pain resolving within 2 to 4 weeks of treatment. Audible grinding usually quietens substantially. The night-guard mouth-splint should still be worn for ongoing dental protection; the injections treat the muscle, the splint protects the teeth.
Will my jawline look thinner?
Yes — over 6 to 12 weeks the masseter muscle atrophies modestly with reduced activity, producing a visibly slimmer, more sculpted jawline. This is one of the reasons masseter treatment is so popular: a clinical effect (reduced bruxism) and an aesthetic effect (slimmer jawline) come together in one treatment. Some patients pay for the cosmetic effect alone, even without bruxism symptoms.
How often will I need treatment?
Initially every 4 to 6 months. With consistent treatment over 1 to 2 years many patients find the interval extends to 6 to 9 months because the muscle has remained smaller and the underlying clenching has often reduced as the headache cycle is broken. A small minority of patients can stop treatment entirely after 2 or 3 cycles; most settle into a longer-interval maintenance rhythm.
Are there side effects?
The most common side effect is a brief change in chewing power — typically described as needing to chew through a steak more slowly for the first 2 to 3 weeks. Speech is unaffected. Rarely, asymmetric atrophy can produce an uneven jawline; this is corrected at the 2-week review by adding small balancing doses or, if filler is appropriate, restoring symmetry with a minor filler placement.
Will my insurance cover this?
Generally not — UK private medical insurance often categorises masseter muscle-relaxing injections as cosmetic regardless of whether the indication is medical. If your dentist or GP has documented bruxism and prior treatments tried (e.g. night-guard, jaw exercises, stress management), it is worth asking your insurer in advance. Self-funded treatment is the typical route.
Get Started
Ready to begin?
Book today.
Dr Oli Aesthetics • 1 Orchard Street, UNTIL Marylebone, London W1H 6HJ
BookAppointments typically available within 1–2 weeks

