Masseter injections for a square jaw · Myeongdong, Seoul
Botox for a Square Jaw in Myeongdong, Seoul
Soften a wide, angular lower face by relaxing overbuilt masseter muscles — a quick injection with no downtime and a gradual, natural slimming.
- Same price as locals
- English-speaking team
- Book on WhatsApp
- 中文 · 日本語
Quick answer
Can Botox fix a square jaw?
Often, yes — when the squareness comes from enlarged masseter muscles rather than bone. Small doses of botulinum toxin relax the chewing muscle at the jaw angle, and as it gradually shrinks from less use, the lower face looks narrower and softer.
The doctor first checks by touch while you clench whether muscle or bone is the cause. A square jaw from bony width responds less, and contouring with jawline fillers may be discussed instead.
Medically reviewed by Dr. Yoon Jong-woo , Medical Director, Umi Clinic (Korean-licensed physician) · Updated October 2026. Results vary by person; the doctor explains risks, side effects and alternatives at consultation.
- Session
- 10–15 min
- Numbing
- Usually none; ice if wished
- Downtime
- None
- Results
- Visible slimming in 4–8 weeks
- Lasts
- Often 4–6 months
- Pricing
- Same price as locals
Your visit
How Square Jaw Botox works at Umi
Every visit is doctor-led and explained in English, from the first skin check to aftercare.
- Jaw assessment
The doctor palpates the masseters while you clench and checks symmetry and bone shape.
- Dose planning
Units per side are set by muscle bulk; uneven sides can receive different doses.
- Injection
A few fine injections into the thickest part of each masseter, away from the smile muscles.
- Aftercare
Avoid massaging the jaw, saunas and heavy exercise for the rest of the day.
Before & after
How Botox softens a square jaw
Relaxed masseters lose bulk over several weeks, so the jaw angle looks slimmer from the front without changing your expression.
Chewing feels slightly weaker as the muscle relaxes.
Muscle volume begins to reduce at the jaw angle.
Most visible slimming of the lower face.
Is it right for you?
Who Square Jaw Botox suits best
Good fit if you…
- Have a wide jaw from strong masseter muscles
- Clench or grind your teeth
- Want a slimmer face without surgery
- Prefer a subtle, gradual change
Consider another option if…
- Width is mainly bone — fillers or surgery may suit better
- Jowls or sagging skin are the main issue
- You are pregnant or breastfeeding
- You have a neuromuscular disorder such as myasthenia gravis
Recovery & results
What to expect, step by step
- Same day
Tiny bumps at injection points fade within an hour; make-up after a few hours.
- First 2 weeks
The toxin takes effect; chewing tough food may feel tiring.
- 1–2 months
The jaw angle looks visibly slimmer.
- 4–6 months
A top-up keeps the muscle from rebuilding; intervals often lengthen over time.
FAQ
Square Jaw Botox questions
How many units do I need for a square jaw?
It depends on muscle size. Most people need a moderate dose per side; the doctor decides after feeling your masseters and may adjust at a review.
Will it change my smile?
When injected correctly into the masseter, it does not affect the smile muscles. Placement away from the front of the cheek helps avoid this.
Does it help teeth grinding too?
Yes. Relaxing the masseters often reduces clenching and grinding, and some people notice less jaw tension.
Can I fly home soon after?
Yes. There is no downtime; just avoid pressing or massaging the area on the day.
Do foreigners pay more?
No. International patients pay the same price as local patients at Umi Clinic.
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Plan your visit
Ask about Square Jaw Botox in English
Send a photo and your travel dates on WhatsApp — the team replies with a plan and a same-as-locals price.
Umi Clinic (우미의원) · 13 Myeongdong 7-gil, Jung-gu, Seoul · Near Myeongdong Station Exit 6 · Directions & hours
