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Non Surgical Jaw Reduction

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Non-surgical jaw uses small doses of toxin placed precisely into the to reduce their bulk over 4-8 weeks. The result: a softer, more oval-shaped lower face for whose wide jaw is caused by rather than bone structure or excess fat. The treatment also relief for bruxism (teeth grinding) and TMJ-related jaw tension, making it useful even for with no concern.

This is the comprehensive guide to : how they work anatomically, who suits the treatment, what to expect from the procedure and result, and when alternative approaches are more .

The masseter muscle and what enlarges it

The masseter is one of the four . It from the arch (cheekbone) and into the angle and lower border of the (jawbone). When it contracts, it the jaw — its primary function in chewing.

The is unusually strong for its size — one of the muscles in the human body by force per cross-sectional area. Like any muscle, it responds to heavy use by hypertrophying (growing larger). factors can produce masseter enlargement:

predisposition. Some individuals naturally have larger masseter muscles regardless of habits — common in certain ethnic backgrounds and family lines.

(teeth grinding). clenching, especially during sleep, exercises the day and night, producing muscle over years.

gum chewing or hard food . Repeated heavy chewing of gum, ice, hard candy, or particularly tough foods can contribute to .

Jaw from stress. Many patients clench their jaw unconsciously during stress, masseter effects.

TMJ . Underlying jaw joint problems can compensatory muscle overuse and consequent hypertrophy.

The result of enlarged masseters is a wider, more lower face. For some this is purely concern. For others, it’s by tension, jaw pain, headaches, or worn tooth from .

How the treatment works

Botulinum toxin directly into the muscles interrupts the nerve-muscle signal that controls contraction. Over 4-8 weeks, the affected muscle:

The treatment doesn’t the muscle — is preserved. The dose is to weaken the muscle enough to produce useful without chewing strength meaningfully.

dose: units per side, depending on muscle size and treatment goal. dosing produces slimming; higher dosing produces more effect but with more reduction in .

Number of injection points: 3-5 per side, distributed across the body of the muscle. This ensures even distribution of effect rather than localised weakness.

What to expect from the procedure

Consultation. Assessment of jaw width, size (palpation while you clench), and of contributing . Photos taken for .

Preparation. Skin . Topical anaesthetic isn’t usually needed — the are quick and well-tolerated.

The injection.

Immediate . Mild redness at injection points, small bruise. No significant immediate effect on the muscle itself — the toxin takes time to act.

.

For broader context, see our .

Timeline of results

Days 1-7: no change. The toxin is acting on the signal but the muscle hasn’t shrunk yet.

Weeks 2-4: muscle becomes . Some patients report less jaw and grinding/ habits.

Weeks 4-8: the muscle begins visibly shrinking as it atrophies from use. Lower face starts to look narrower.

Month 2-3: maximum slimming effect visible. The lower face more oval-shaped, often look more defined by contrast.

Months 3-6: stable result. Patients enjoy the appearance and ongoing in jaw .

Months 6-9: effect begins to fade as muscle gradually returns. Maintenance .

The slimming effect is gradual and often goes by family and friends — they may comment that you look without identifying what’s . This is part of why the treatment is popular: it produces meaningful change without obvious "work."

Who is a good candidate?

The ideal candidate has:

Less candidates:

For more on the broader question of jawline aesthetics, see our guide on and our reference.

The therapeutic benefits beyond cosmetic

For many patients, jaw slimming significant relief from:

Bruxism (teeth grinding). The weakened muscle can’t grind as forcefully. Patients with worn tooth from years of grinding often see substantial improvement, sometimes documented by their at .

Jaw and pain. Chronic produces deep jaw aching that responds well to muscle relaxation.

Tension . Some headaches are driven by chronic masseter and muscle . Treatment can meaningful headache reduction.

TMJ discomfort. While not a treatment for TMJ disorder, the relaxation can reduce TMJ-related pain in many .

Dental wear protection. For patients who grind their teeth, tooth surface from further wear is beyond any .

These therapeutic benefits sometimes prompt to seek the treatment for reasons, with the effect being a welcome rather than the primary goal.

Combining with other treatments

Jaw slimming injections often combine well with other facial treatments:

Jaw + cheek filler. Reducing width while enhancing cheekbone definition produces dramatic overall sculpting. See our guide on .

Jaw + chin filler. Sharper, more chin with narrower jaw produces refined lower-face .

Jaw slimming + buccal fat removal. For with both wide jaw and full lower cheeks, combined addresses both. See our guide on for the broader thinking.

Jaw slimming + anti-wrinkle treatment elsewhere. Often in the same as forehead or glabella for comprehensive injectable refinement.

For the non-surgical rejuvenation context, see our .

Cost

Jaw slimming at Centre for Surgery are priced per session:

Over a year, total cost is £400-£700 depending on the dose and maintenance frequency.

, 0% APR, are available.

A useful comparison: the cost is substantially less than the surgical alternatives ( or reduction Breast surgery), with much faster recovery and no change.

Risks and considerations

Common (mild and self-limiting):

Less common:

Rare:

injection substantially reduces these risks. A thorough discusses your specific risk profile based on your and goals.

Common questions

Yes — function is preserved. The treatment bulk and weakens excessive force but doesn’t eliminate the muscle’s function. Most patients notice no change in their ability to eat normally.

The slimming gradually over 4-8 weeks. Initial muscle relaxation is felt within 2 weeks; slimming starts at week 4 and peaks around weeks 8-12.

Not when the treatment is dosed in appropriate . with faces are typically advised against the because of this risk. The should look like refinement, not .

Yes — biting force is preserved. Some patients notice the slight reduction in when eating particularly tough foods (chewy meat, hard candy), but eating is entirely normal.

Typically 6-9 months. Many find that with treatment over years, the muscle stays relatively even between treatments, sometimes longer intervals.

Often yes — particularly nighttime grinding. The weakened muscle can’t grind as . Tooth wear is a significant . Discuss with your as well — combining the treatment with a night guard can be even more effective.

Yes, though more conservatively. Men typically prefer to retain some jaw width for while still benefiting from reduced muscle tension and bruxism relief. The treatment plan is adjusted accordingly.

The toxin can’t be actively reversed (unlike filler, which can be dissolved). The effect wears off over 6-9 months as muscle activity returns. If you don’t like the result, simply discontinuing will allow the muscle to gradually regain its previous size.

Mandibular contouring surgery removes bone from the jaw angle — addressing wide jaw caused by bone structure rather than muscle. It’s more invasive, more permanent, and a different cause. Jaw slimming only affect muscle. The right on whether your jaw width comes from bone or muscle, which is established at consultation.

Most patients clearly see the change in their own face. and family often notice the patient looks "refreshed" or "thinner" without identifying what specifically . The is part of why the treatment is popular.

Centre for Surgery · CQC-regulated · GMC specialist-registered surgeons · · · ·

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Centre for Surgery is a CQC-regulated private hospital on London’s Baker Street, plastic and cosmetic surgery through GMC-registered specialist surgeons. Our expertise spans facial procedures and , , for men, and body contouring procedures such as and . Patient safety, excellence and natural-looking results sit at the heart of everything we do.

Centre for Surgery is a CQC-regulated private on London’s iconic , plastic and surgery led by GMC-registered surgeons.

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