NEUROMODULATORS · TREATMENT
Masseter treatment for jaw slimming
A broad lower face can reflect bone, fat or the masseter muscles used for chewing. Masseter treatment is considered only when muscle size contributes to the concern.
Is it right for me?
Adults with enlarged masseter muscles may be assessed. Jaw pain, clenching or grinding can also need a dental or medical evaluation rather than cosmetic treatment alone.
Treatment is unsuitable with an infection at the injection site or allergy to the proposed product. Neuromuscular illness, swallowing or breathing problems and medicines that affect muscle function need specific review. Pregnancy and breastfeeding require discussion because safety data are limited; elective treatment may be deferred.
Evidence and realistic expectations.
Botulinum toxin can reduce the size of an enlarged chewing muscle over time. Cosmetic masseter treatment is off-label for many products. Evidence for contour change does not establish that it treats the cause of teeth grinding.
It cannot narrow a jaw made broad mainly by bone. Chewing weakness, smile changes and increased lower-face looseness may occur. Repeated treatment should consider function as well as appearance; long-term effects need discussion.
Risks to understand.
Bruising, headache, asymmetry and unwanted muscle weakness can occur. Depending on the area, this can affect the eyelids, smile, chewing or neck. Rare spread of toxin effect can cause serious weakness. Trouble speaking, swallowing or breathing after treatment needs immediate medical attention.
What to expect.
Consultation
Discuss your concern, medical history, previous treatments and what you would like to preserve. Dr. Roy will explain suitable options, alternatives, risks and fees before you decide.
Treatment
Dr. Roy assesses the jaw muscles and facial proportions, then discusses whether botulinum toxin is suitable. Treatment is placed into selected masseter areas.
Recovery
Allow for temporary injection marks or bruising. Dr. Roy will explain activity and aftercare advice for the areas treated; do not plan around a promise of zero downtime.
Results and review
Contour change develops more slowly than expression-line softening, over several weeks. Assessment over roughly one to three months helps establish the response.
Number of visits
A first treatment and later contour review guide any repeat sessions. More treatment is not automatically better.
Good questions.
Clearer decisions.
What can masseter treatment for jaw slimming address?
Jaw width caused by enlarged chewing muscles. A broad lower face can reflect bone, fat or the masseter muscles used for chewing. Masseter treatment is considered only when muscle size contributes to the concern.
Who might be a suitable candidate?
Adults with enlarged masseter muscles may be assessed. Jaw pain, clenching or grinding can also need a dental or medical evaluation rather than cosmetic treatment alone.
What happens during the appointment?
Dr. Roy assesses the jaw muscles and facial proportions, then discusses whether botulinum toxin is suitable. Treatment is placed into selected masseter areas.
How much recovery time should I allow?
Allow for temporary injection marks or bruising. Dr. Roy will explain activity and aftercare advice for the areas treated; do not plan around a promise of zero downtime.
When could I see a change?
Contour change develops more slowly than expression-line softening, over several weeks. Assessment over roughly one to three months helps establish the response.
How many visits might I need?
A first treatment and later contour review guide any repeat sessions. More treatment is not automatically better.
Does this reshape the jawbone or treat every cause of teeth grinding?
The treatment targets muscle; it is not a procedure to reshape the jawbone. It is not a complete treatment for teeth grinding. Chewing fatigue, smile changes and lower-face looseness are possible. Discuss the benefits, uncertainties and possible long-term effects before considering repeated treatment.
What is the cost of masseter treatment for jaw slimming?
Contact the clinic for current fees. Ask for the price of the consultation, each proposed treatment, any planned review and any optional additional steps before deciding. No fixed fee is published on this page.
General patient information. A consultation is needed to determine your suitability. Treatment choices and outcomes vary.
Further reading: Botulinum toxin: patient questions · Botulinum toxin: example US prescribing information and area-specific warnings · One-year controlled study of jawbone density after masseter treatment. These sources do not endorse the clinic. Regulatory information from other countries is identified as such.
Evidence and copy checked 2026-09-16.
Related care.
Request a consultation.
Ask about masseter treatment for jaw slimming with Dr. Roy. Choose your topic, then review and send your request on WhatsApp.
A conversation first.
Take the time you need.
A consultation is a chance to discuss options, risks and costs. You can ask about a simpler plan or decide not to proceed.