What Is Masseter BTX?
Masseter BTX involves the injection of botulinum toxin into the masseter muscles — the large jaw muscles on either side of the face. By reducing the contractile activity of the masseter, BTX causes the muscle to atrophy over 3–4 weeks, reducing lower face width and creating a slimmer facial shape.
Choosing a Botulinum Toxin for Jaw Slimming
Dr Sin Yong selects the botulinum toxin product for jaw slimming at consultation, typically 16–20 standard units per side. Early softening is usually visible within 7–10 days. Full masseter atrophy is evident at 4–6 weeks.
How Many Sessions Are Needed?
Most patients see significant slimming after a single session. Repeat treatments typically needed every 4–6 months initially. As the masseter atrophies progressively with repeated treatment, the interval between sessions extends. Some patients require only annual maintenance after 2–3 rounds.
Face Slimming Beyond the Masseter
For patients where masseter reduction alone is insufficient: chin filler adds vertical length and reduces relative width; jawline filler creates a more angular jaw that reads as narrower; Time Freeze Laser LCLR lipo-remodelling reduces facial fat deposits.
Who Is a Good Candidate?
Masseter BTX is most suitable when apparent facial width is primarily due to muscle bulk rather than bone structure. Patients with wide jaw bones will not achieve full width reduction from BTX alone. Dr Sin Yong assesses the primary cause of facial width at consultation.
Ready to Book a Consultation?
All treatments performed personally by Dr Sin Yong at 9 Scotts Road, #12-01 Pacific Plaza, Singapore.
WhatsApp +65 8815 3008Frequently Asked Questions
Masseter BTX (botulinum toxin) is a commonly used non-surgical face slimming treatment where muscle bulk is the cause. Combined with chin filler, a more V-shaped profile can be achieved. For fat-driven lower face heaviness, 4K Body Lift offers long-lasting reduction.
Visible jaw slimming requires 2–3 sessions spaced 4–6 months apart. The masseter progressively reduces in bulk with each session.
Mild changes in bite strength may occur for 2–4 weeks as the masseter adapts. Normal eating is maintained throughout treatment.
With sustained treatment, masseter reduction becomes progressively more sustained. Stopping treatment allows the muscle to gradually regain bulk over 6–12 months.