Masseter Botox in Seoul, Korea
Masseter Botox relaxes and gradually shrinks enlarged chewing muscles, slimming a square jaw into a softer V-line and easing clenching — a 5–10 minute treatment with no downtime at NEST Clinic, Gangnam.
- Treatment time 5–10 min
- Downtime None
- Full result 8–12 weeks
- Lasts 4–6 months
🌸 Quick answer
How does masseter Botox slim the face? Masseter Botox places a muscle-relaxing neurotoxin into the thickest part of each masseter, the main chewing muscle at the jaw angle. With less activity the muscle slowly gets smaller, so the lower face looks narrower and more tapered. Softening starts at 2–3 weeks, visible slimming at 4–6 weeks and the full result at 8–12 weeks. Effects usually last 4–6 months, and regular sessions may keep the muscle smaller for longer.
What is masseter Botox?
Masseter Botox is an injection of botulinum toxin into the masseter muscles on both sides of the jaw. These muscles can become bulky from clenching, grinding or strong chewing habits, making the lower face look wide or boxy. Relaxing them reduces their size over several weeks and also tends to ease jaw tension.
It is the same treatment many people search for as jaw Botox or V-line Botox. Because it works on muscle, a doctor first checks that muscle — not bone or fat — is the main cause of the width.
What it can improve
- Square, wide or bulky jawline
- Overdeveloped chewing muscles
- Clenching and teeth grinding (bruxism)
- TMJ-related muscle tension
- Asymmetric jaw muscle size
Why people choose it
- Slimmer, softer lower face without surgery
- Cosmetic and functional benefits
- 5–10 minute treatment
- No downtime
- Suits both women and men
Before & after: what changes
Slimming happens slowly as the muscle shrinks, so the face looks naturally softer rather than suddenly different.
Who is a good candidate?
Usually a good fit
- A strong or large masseter you can feel when clenching
- A boxy or wide lower face
- Chronic jaw tension, clenching or grinding
- Jaw muscle asymmetry
- Women and men wanting a smaller, V-shaped face
Not the right choice for
- Width caused mainly by jaw bone
- Fullness from fat or sagging (see double chin treatments)
- Pregnancy, breastfeeding or certain neuromuscular conditions
How masseter Botox is done
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Facial assessment
The doctor feels the muscle while you clench and reviews your chewing habits and symmetry.
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Targeted injection
Botox is placed into the densest part of each masseter with a fine needle.
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Back to your day
The treatment takes about 5–10 minutes with minimal discomfort and no downtime.
Recovery and results timeline
You can return to normal activities immediately. Mild tightness when chewing, slight tenderness, small bumps or, rarely, minor bruising may appear and settle quickly.
- Day 0 Normal activities right away
- Week 2–3 Early softening of the jawline
- Week 4–6 Visible facial slimming
- Week 8–12 Full V-line result
Masseter Botox at a glance
| Also called | Jaw Botox, V-line Botox, masseter reduction |
|---|---|
| Treatment time | 5–10 minutes |
| Anaesthesia | Usually not needed |
| Downtime | None |
| Full result | 8–12 weeks |
| Duration | 4–6 months; often longer with maintenance |
| Cost | Confirmed at consultation by product and dose. International patients pay the same local price. |
Aftercare tips
- Avoid massaging the jaw for the rest of the day
- Skip saunas and intense workouts for 24 hours
- Chewing may feel slightly weaker at first — choose softer foods if tough foods tire you
- Plan repeat sessions every 4–6 months if you want to maintain slimming
Medically reviewed by
Dr. Sohee Joo · Chief Executive Doctor, NEST Clinic
Medytox Best Doctor · Restylane (Galderma) Medical Advisor · Key Doctor for several injectable brands. M.Sc., Dongguk University College of Medicine; specialist training at Dongguk University Medical Center.
Masseter Botox FAQ
How long does masseter Botox last?
Most people keep results for 4–6 months. With regular sessions the masseter often stays smaller, so results may last longer and fewer units can be needed over time.
Will masseter Botox affect my chewing?
Chewing may feel slightly tired for the first weeks, especially with tough or chewy foods. Everyday eating stays normal, and the feeling usually fades as you adapt.
Can masseter Botox help with teeth grinding?
It can ease clenching, grinding and related jaw tension by relaxing the muscle. Your doctor will check whether it suits your symptoms; a dentist may still advise a night guard.
Is masseter Botox the same as jaw Botox?
Yes. Both terms describe Botox injected into the masseter muscles to slim the lower face and ease clenching. Our jaw Botox page covers the same treatment from a face-shape angle.
Can I combine masseter Botox with other treatments?
Yes. It is often paired with temple Botox, chin filler or lifting treatments to balance the whole face. Your doctor will plan the order and timing.
Is it suitable during a short trip to Seoul?
Yes. The treatment takes minutes and has no downtime. Slimming develops over the following weeks, so most visitors see the full result after returning home.
Often considered with masseter Botox
Is muscle behind your wide jaw?
Send a front and side photo on WhatsApp — our doctors will tell you honestly whether masseter Botox, filler or another option suits your face shape.