Slim the jaw, soften the line.
A non-surgical treatment that can slim the lower face by relaxing the chewing muscles at the angle of the jaw. Personalized to your anatomy and muscle strength for balanced, natural-looking results.
Masseter Botox, explained.
Botox injected directly into the masseter muscles — the chewing muscles at the angle of the jaw. By relaxing how hard the muscle works, the muscle can decrease in size over time, which may create a slimmer, softer lower face.
Experience matters.
Masseter Botox requires thoughtful dosing and precise placement. Choosing an experienced injector is one of the most important factors in your result and your safety.
Masseter Botox at Dam Medspa is performed by Uy Dam, NP — a nurse practitioner with more than seven years of medical aesthetics experience and hundreds of masseter treatments performed.
The approach is conservative and detail-focused: thoughtful assessment, anatomy-based dosing, and balanced placement that prioritizes facial harmony over a one-size-fits-all formula.
Is this right for me?
Masseter Botox works best for clients whose lower facial width comes mainly from enlarged masseter muscles — not from bone structure alone. During your consultation, we'll assess your anatomy and muscle strength to determine the right fit.
- Your lower face looks wide or square
- You notice bulky jaw muscles when clenching
- You grind or clench your teeth
- You experience jaw tension or soreness
- You want jawline slimming without surgery
- You prefer a treatment with little to no downtime
Not everyone is an ideal candidate. If lower face width is mostly from bone structure rather than muscle, masseter Botox may not deliver the slimming effect you're hoping for. We'll tell you honestly what to expect.
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Cosmetic candidates
Clients seeking a softer, slimmer lower face
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Functional candidates
Clients dealing with jaw tension, clenching, or grinding
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Combination candidates
Most clients fall into both groups — and benefit from both outcomes
What your appointment looks like.
A calm, step-by-step process designed to feel thoughtful — not rushed.
Consultation & assessment
We review your goals, symptoms, and facial anatomy. You may be asked to clench your jaw so the masseter muscles can be evaluated for size and strength.
Personalized treatment plan
Your dosing plan is built around your muscle strength, facial balance, and desired outcome. We'll walk you through the recommended units and what to expect.
Cleansing & marking
The skin is cleansed and the treatment area is carefully marked to guide safe, accurate injection placement. Precise placement matters — the masseter sits near other muscles involved in facial expression.
Botox injection
Botox is injected directly into the masseter muscles using a fine needle. The treatment is quick and generally very tolerable — most clients describe it as a series of small pinches.
Aftercare instructions
Before you leave, we walk through what to expect over the next several weeks — when slimming may begin, what's normal, and when to reach out if anything feels off.
Personalized, transparent pricing.
Masseter Botox is priced by unit at $13/unit. Your total depends on the size and strength of your muscles — most clients fall in the 20–25 units per side range.
Per-unit pricing lets your treatment match your actual muscle strength and needs — rather than charging everyone a flat fee. Underdosing can lead to less improvement or increase the chance of issues like paradoxical bulging, so getting the dose right matters.
Your actual dose may be higher or lower depending on muscle size, strength, and goals. We'll confirm everything before treatment.
A gradual transformation.
Masseter Botox works gradually. Because the goal is to relax and shrink a strong muscle over time, the slimming effect builds — it doesn't happen instantly.
Mild tenderness, swelling, or small bumps at injection sites can happen — these are usually temporary and resolve on their own.
Functional benefits, too.
While facial slimming is usually the main cosmetic reason clients choose this treatment, many also enjoy meaningful functional benefits — especially around jaw tension and grinding.
- May reduce jaw tension and soreness
- May help with teeth grinding (bruxism)
- May reduce clenching, especially at night
- May ease discomfort from overactive jaw muscles
- May help some TMJ-related symptoms
Results vary from person to person. Masseter Botox at a medspa is not a replacement for a full dental or medical evaluation when jaw pain is severe or persistent — see a dentist or specialist for diagnosis.
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Cosmetic + functional
Many clients book for jaw slimming and discover relief from grinding as a bonus
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Better sleep
Reducing nighttime clenching can improve sleep quality and morning jaw soreness
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Headache relief
Some clients with tension headaches related to clenching notice improvement
Possible complications.
Masseter Botox is generally well tolerated when performed by an experienced injector — but complications are possible with any injectable. Knowing what to look for matters.
Crooked smile
Can happen if Botox relaxes a neighboring muscle involved in smiling. Usually related to placement or dosing — and almost always temporary.
Paradoxical bulging
A walnut-shaped bulge at the jaw when clenching. May happen from underdosing or from not adequately treating both deep and superficial portions of the masseter.
Mild side effects
Bruising, swelling, or tenderness at injection sites. Usually mild and temporary, resolving on their own within a few days.
Complications are uncommon, but they can happen. Careful assessment, anatomy-based dosing, and precise placement are the most important factors in reducing risk — which is why injector experience matters.
A thoughtful, balanced approach.
The goal isn't just to inject product — it's to create balanced, natural-looking results based on your individual anatomy.
With more than seven years of medical aesthetics experience and hundreds of masseter treatments performed, Uy Dam, NP provides personalized treatment plans designed to slim the lower face while maintaining facial harmony and reducing complication risk.
Masseter Botox questions, answered.
How long does Masseter Botox take to work?
Most clients see noticeable slimming around 4 to 6 weeks after treatment. Functional benefits like reduced clenching often appear earlier — sometimes within 2 weeks.
How many units are used for Masseter Botox?
The average dosing is about 20 to 25 units per side (40–50 units total). The exact amount depends on your muscle size, strength, and goals. We confirm the dose during your consultation before any injection.
How much does Masseter Botox cost?
Botox at Dam Medspa is $13 per unit. A treatment using 20 units per side costs $520 total; 25 units per side costs $650 total. Per-unit pricing means your cost matches your actual treatment plan — not a flat fee.
Can Masseter Botox slim the face?
Yes — when facial width comes from enlarged masseter muscles. If your lower face width is mostly from bone structure, masseter Botox may not produce the slimming effect you're hoping for. We'll assess this honestly at consultation.
Does Masseter Botox help with grinding or clenching?
Many clients report meaningful relief from clenching, grinding (bruxism), and jaw tension after treatment. Results vary, and severe TMJ issues should be evaluated by a dentist or specialist — but for muscle-related tension, masseter Botox can help significantly.
Is there downtime after Masseter Botox?
There is usually little to no downtime. Most clients resume normal activities the same day. Mild tenderness or small bumps at injection sites may occur but typically resolve quickly.
What are the risks of Masseter Botox?
Possible risks include bruising, swelling, crooked smile, and paradoxical masseteric bulging, though these are uncommon. Careful assessment, anatomy-based dosing, and precise placement help reduce risk — which is why choosing an experienced injector matters.
How long do Masseter Botox results last?
Results are temporary — typically 3 to 6 months initially. Maintenance treatments help maintain the slimming and functional benefits. Over time, with consistent treatment, the muscle stays smaller and some clients find they can space treatments further apart.
A slimmer, softer jawline.
Book a consultation and we'll build a plan that matches your anatomy, goals, and timeline — no pressure, just expert guidance from an injector who's done hundreds of these.
Book a consultation