Masseter Botox in Seoul: Jaw Slimming Injections in Gangnam
Botox injected into the chewing muscles to slim a square jaw and soften the lower face, performed by doctors in Gangnam.
Masseter Botox is an injection of botulinum toxin into the jaw (masseter) muscles that gradually reduces muscle bulk, slimming a square or wide lower face; it can also ease clenching and grinding. The injections take about 3–5 minutes (10–15 minute visit) with no real downtime. Early change appears in 2–4 weeks, the full slimming effect at 6–8 weeks, and results last about 4–6 months.
What is masseter Botox?
Masseter Botox uses small doses of botulinum toxin injected into the masseter muscles, the chewing muscles at the sides of the jaw. As the muscles relax and gradually reduce in bulk, the lower face looks slimmer, softer and less square, with a more tapered V-line. It is one of the most common non-surgical face-slimming treatments in Gangnam.
Benefits
- Slims a wide or square lower face
- Enhances the V-line profile and improves symmetry
- Can ease clenching and teeth grinding (bruxism)
- No surgery and little or no downtime
Real result: Jawline / side-cheek volume (masseter & cheek filler)
Jaw slimming result: the lower face gradually narrows as the masseter relaxes, with the full effect at about 6–8 weeks.
Who is a good candidate?
- People with bulky or enlarged masseter muscles
- A square or wide jawline, or lower-face heaviness caused by muscle
- Those who clench or grind their teeth
If fullness is caused mainly by fat or sagging skin, fat-dissolving or lifting treatments may suit better. The doctor assesses muscle size, proportions and symmetry before choosing a dose.
What to expect during treatment
- English consultation and jaw muscle assessment
- Customised dose based on muscle bulk
- Quick injections, usually 3–5 minutes; total visit around 10–15 minutes
- Immediate return to daily activities with written aftercare
Results and timeline
- Early changes: 2–4 weeks
- Full slimming effect: 6–8 weeks
- Duration: about 4–6 months
Regular treatments may help the contour last longer over time. Dosing aims to avoid over-relaxation so chewing and expression stay natural.
Aftercare
- Do not massage the jaw for 24 hours
- Avoid intense workouts and sauna for one day
- Mild tenderness is normal and temporary
Pricing depends on the product and dose and is confirmed at consultation.
Reviewed by Dr. Joo Sohee
Representative director of Nest Clinic Gangnam, a doctor-led aesthetic clinic with a female medical team that treats local and international patients. This page is reviewed for medical accuracy; it is general information, not a diagnosis. Treatment plans are decided after an in-person consultation.
Clinic treatment counts as reported by Nest Clinic. About the clinic
Frequently asked questions
How long does masseter Botox last?
Results typically last about 4–6 months; regular sessions may help the slimming effect last longer.
When will I see jaw slimming results?
Early changes appear after 2–4 weeks and the full slimming effect at around 6–8 weeks.
Will masseter Botox affect chewing?
Doses are chosen to avoid over-relaxation, so chewing stays comfortable; some people notice mild fatigue with hard foods in the first weeks.
Can masseter Botox help with teeth grinding?
Yes. Relaxing the masseter muscles can reduce clenching and grinding (bruxism).
Is there downtime after jaw Botox?
No significant downtime. Avoid massaging the jaw for 24 hours and skip intense workouts or sauna for a day.
Planning masseter Botox in Seoul?
Send us a photo and your goals — a doctor reviews it and our English-speaking coordinator replies with a personalised plan and price.
4F–5F Seocho Building, 453 Gangnam-daero, Seocho-gu, Seoul
1-min walk from Sinnonhyeon Station Exit 7 (Line 9)
7–10 min from Gangnam Station Exit 10/11
+82-10-4843-2867
