Masseter Jeuveau (botulinum toxin into the masseter muscle) does three things at once: slims the lower face by reducing masseter bulk, relieves bruxism (teeth grinding) and TMJ tension, and reduces jaw clenching headaches. The cosmetic effect develops over 4–8 weeks as the masseter atrophies from disuse — gradual, natural-looking jaw slimming. The functional relief from grinding starts within days. Many patients book it for one reason and benefit from the other.
Masseter Jeuveau is dosed higher than facial-line treatments — typically 25–50 units per side depending on muscle bulk. The masseter is a thick, powerful muscle; lower doses won't produce visible slimming. We palpate the muscle during clenching to identify the optimal injection points, avoiding the parotid gland and other sensitive structures. Functional improvements (grinding, headaches) develop within 3–7 days. Cosmetic slimming develops over 4–8 weeks as muscle atrophies from disuse. Effects last 4–6 months for the cosmetic component, with the functional benefit often lasting longer. Repeat treatments are typically needed every 4–6 months initially; many patients can extend to every 6–9 months once muscle bulk is established at the slimmer baseline. Contraindications include neuromuscular disorders, pregnancy, breastfeeding, and active infection at the injection site.
Key Benefits
Common questions
Frequently asked
Will masseter Jeuveau slim my jaw?
Yes, gradually. The cosmetic effect develops over 4–8 weeks as the masseter atrophies from disuse. The slimming is natural-looking — most people just notice a more refined lower face without identifying what changed.
How does it help with teeth grinding?
By weakening the masseter, Jeuveau reduces clenching force. Patients with bruxism (nighttime teeth grinding) often report relief within days — much faster than the cosmetic effect. TMJ tension and jaw clenching headaches also improve.
How many units do I need?
Masseter dosing is much higher than facial-line treatments — typically 25–50 units per side depending on muscle bulk. Lower doses won't produce visible slimming.
How long does masseter Jeuveau last?
Cosmetic slimming lasts 4–6 months. Functional benefit (grinding relief) often lasts longer. Repeat treatments are typically needed every 4–6 months initially; many patients can extend to every 6–9 months once muscle bulk is established at the slimmer baseline.
Should I add chin or jawline filler with this?
Often a great combination. Slimming the masseter first, then defining the bony jaw with filler, produces a more sculpted lower face than either treatment alone. We discuss combined plans at consultation.