Facial Slimming and Bruxism Consultation

prescription-only medicines into the masseter muscles — softens a square jaw and relieves teeth grinding (bruxism) and jaw tension.

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Facial Slimming and Bruxism Consultation

Duration

60 min

From

£400

Treatment Summary

prescription-only medicines placed into the masseter muscle — the main chewing muscle on the side of the lower face — to soften an over-developed or square jaw line, and to relieve the consequences of bruxism (teeth grinding) and jaw clenching: morning jaw pain, tension headaches, dental wear, TMJ discomfort. Effect builds over 4–8 weeks as the muscle gradually atrophies; first treatment lasts 4–6 months, with longer duration on subsequent treatments. A genuinely dual-purpose intervention with a clear cosmetic and functional rationale.

Also known as: masseter facial line treatment · jaw slimming treatment · bruxism treatment · teeth grinding treatment · TMJ treatment · square jaw treatment

Key Benefits

Softer Jawline Contour

Gradual reduction of masseter bulk produces a softer, more oval lower-face shape over 4–8 weeks.

Relief from Bruxism

Significant reduction in clenching force and morning jaw pain; protects teeth from continued grinding wear.

Reduced Tension Headaches

Many patients report fewer temporal and tension-type headaches once masseter activity is reduced.

Dual Cosmetic and Functional Benefit

One treatment that addresses both an aesthetic concern and a clinical one — rare in this field.

What masseter treatment is

The masseter is the strong, fan-shaped chewing muscle on the side of the lower face, running from the cheekbone to the lower jaw angle. In some people — particularly those who clench or grind their teeth — the masseter becomes hypertrophic (over-developed), producing a square or full lower face and contributing to a range of symptoms: morning jaw pain, tension-type headaches, dental wear, jaw fatigue, and TMJ discomfort.

prescription-only medicines injected into the muscle belly temporarily reduces the strength of contraction. Over weeks, the under-used muscle gradually atrophies. The visible result is a softer, more oval lower-face contour. The functional result is reduced clench force, less grinding at night, and protection of the teeth and jaw joint.

This is one of the more compelling treatments in aesthetic medicine because it does two genuinely useful things — cosmetic refinement and clinical symptom relief — with a single intervention.

How treatment is delivered

At Aesthetic Clinique in West Hampstead, masseter treatment follows a careful protocol:

  • We palpate the muscle on each side at rest and on hard clench, mapping bulk and any asymmetry.
  • The injection field is confined to the lower-posterior safe zone of the masseter, well away from the risorius, zygomaticus and buccinator — the muscles that shape your smile.
  • 3–5 deep intramuscular injections per side are placed, with dose individualised to muscle bulk.
  • Asymmetric doses are common; one side is often more developed than the other.

Timeline of effect

This is a slower-onset treatment than cosmetic facial line consultations. Bruxism relief is usually felt within 1–2 weeks. Visible jaw slimming develops over 4–8 weeks as the muscle physically shrinks from reduced use. Some refinement continues up to 12 weeks.

Duration is typically 4–6 months on a first treatment. With repeat treatment every 4–6 months for a year, the muscle adapts to a smaller resting size, and the interval often extends — many established patients return at 6–8 months for maintenance.

Who suits this — and who doesn't

It suits patients with genuine masseter hypertrophy (palpable on clench) and/or bruxism symptoms (morning jaw pain, dental wear, tension headaches, jaw fatigue). It does not address lower-face fullness driven by fat pads, jowling or skin laxity — those need different treatments. It is not appropriate for severe TMJ disc disease, in pregnancy or breastfeeding, or in certain neuromuscular conditions. Where dental wear is significant we will recommend dental review alongside; we do not replace the protection of a fitted night-guard if one has been prescribed.

Combinations

Masseter slimming combines naturally with the Nefertiti lift (for jawline definition), with chin filler (for a more balanced lower-face profile), and with upper-face facial line treatment. We treat one thing at a time and review before adding more.

What to Expect

  1. 1

    Assessment of masseter bulk and bruxism history

    We palpate the masseter on each side at rest and on clench, document asymmetry, and review your bruxism history — sleep grinding, morning jaw pain, dental wear, jaw clicking. Dental review is helpful where wear is significant.

  2. 2

    Mapping the safe injection zone

    The injection field is mapped within the safe lower-posterior zone of the masseter, away from the risorius and zygomaticus muscles to avoid affecting smile shape. Asymmetric doses are used where one side is bulkier.

  3. 3

    Injection — typically 3–5 points per side

    Each side receives 3–5 injection points reaching deep into the muscle belly. Total injecting time is around 5 minutes. Sensation is brief stinging plus some pressure.

  4. 4

    Slow build-up and long duration

    Bruxism relief typically begins at 1–2 weeks. Visible jaw slimming develops more slowly, peaking at 4–8 weeks. Duration is 4–6 months on a first treatment, often 6–8 months by the second or third treatment as the muscle stays smaller.

Suitability

Aesthetic care is highly individual. The points below are general guidance — final suitability for facial slimming and bruxism consultation is always confirmed in your consultation.

Often suitable for

  • Square or over-developed lower face from masseter hypertrophy — a softer, more oval jaw is the goal
  • Patients with diagnosed or strongly suspected bruxism (sleep grinding, daytime clenching)
  • Patients with morning jaw stiffness, temporal headaches or jaw fatigue
  • Patients with dental wear or fracture risk who already wear a night-guard
  • Patients with mild–moderate TMJ discomfort related to chewing-muscle overactivity

May not be suitable if

  • Severe TMJ disc disease or joint pathology — needs specialist TMJ assessment first
  • Lower-face fullness driven by fat pad or skin laxity rather than masseter bulk
  • Pregnancy or breastfeeding
  • Certain neuromuscular conditions
  • Patients seeking immediate jaw slimming — the effect builds over weeks, not days

Aftercare

Caring for your results

A few simple steps in the first 24–48 hours help your results settle as expected.

  • Avoid intense jaw use (chewy meat, tough crusty bread, very chewy gum) for 24 hours
  • Avoid massaging the jaw or sleeping face-down on the first night
  • Mild jaw fatigue when chewing tough food in the first 1–2 weeks is expected and normal
  • Continue using your night-guard if one has been prescribed by your dentist
  • Avoid intense exercise, saunas and hot yoga for the rest of the day
  • Notify the clinic of any unexpected smile asymmetry, swallowing change or significant chewing weakness

Treatment Areas

  • Masseter
  • Jaw

prescription-only medicines type A for masseter hypertrophy and bruxism is supported by a substantial body of published clinical literature, including randomised trials demonstrating reduction in masseter volume on imaging, reduction in clench force, and reduction in bruxism-related symptoms. The off-label indication is well-established in international aesthetic and dental practice. We use only MHRA-licensed prescription-only medicines brands.

Frequently Asked Questions

How quickly will I see jaw slimming?
Bruxism relief can be felt within 1–2 weeks, but visible jaw slimming develops more slowly because it depends on the muscle gradually shrinking from reduced use. Most patients see a noticeable softening of the lower-face contour at 4–8 weeks, with continued refinement up to 12 weeks.

How long does it last?
Typically 4–6 months on a first treatment. By the second or third treatment, duration often extends to 6–8 months because the muscle stays smaller — re-treatment maintains rather than re-shrinks.

Will I lose chewing strength?
You will notice that very chewy foods (tough steak, hard crusty bread, very chewy gum) are slightly more tiring for the first 1–2 weeks. Normal chewing function is preserved. Most patients say the change is minor and quickly adapt; many find it pleasant to eat without unconsciously over-clenching.

Can it stop teeth grinding entirely?
It dramatically reduces grinding force in most patients, which is what protects your teeth. Some patients find sleep grinding largely stops; others continue to grind but with much less force and no morning pain. We still recommend you continue using a dental night-guard if your dentist has prescribed one.

Will my smile change?
Not when the injection is placed within the safe lower-posterior zone of the masseter, away from smile muscles. Smile asymmetry is rare and almost always related to over-anterior placement. We map carefully to avoid this.

Can it help my TMJ pain?
It can help mild-to-moderate TMJ discomfort that is driven by masseter overactivity. It does not treat TMJ disc disease, joint inflammation or significant joint pathology, which need specialist assessment. We will refer if the picture suggests joint disease rather than muscle overuse.

Can men have this treatment?
Yes — it is a frequent male treatment for bruxism, jaw fatigue and tension headaches, and male masseter is often more bulky requiring slightly higher doses. Significant cosmetic jaw slimming is a separate consideration and we will discuss whether it is desirable for the male face shape you have.

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