Square Jaw Botox in Seoul
Square Jaw Botox is a non-surgical injectable treatment designed to reduce the width and prominence of a square or angular jawline. By relaxing the masseter muscles, this treatment helps create a slimmer and softer lower facial contour while maintaining natural facial movement.
Medically reviewed by Dr. Rhee Se Whan, plastic surgeon · Updated October 2026
What is Square Jaw Botox ?
Square Jaw Botox involves injecting botulinum toxin into the masseter muscles located at the sides of the jaw. These muscles can become enlarged due to genetics, clenching, or grinding, contributing to a wider or more angular jaw appearance.
How Square Jaw Botox works
Assessment of jaw shape and muscle activity
Cleansing and preparation of the injection area
Targeted injections into the masseter muscles
Immediate return to daily activities
Why patients choose Square Jaw Botox
Slimmer and softer jawline appearance
Reduced lower-face width
Relaxation of overactive jaw muscles
Non-surgical facial contouring option
Minimal downtime
Is it right for you ?
- Have a wide or square jawline due to muscle bulk
- Want facial slimming without surgery
- Experience jaw clenching or tension
- Prefer non-invasive aesthetic treatments
This treatment is generally not recommended for pregnant or breastfeeding individuals.
Where it works
Treatment plans are customized based on facial structure and muscle strength.
similar procedure ♡
Real results from a related procedure
These Grand patients had a PDO thread lift — a procedure closely related to Square Jaw Botox. They show the natural style of change we aim for; your own result depends on your anatomy and treatment plan.
- Softer lines and smoother skin
- A more relaxed, balanced look
- Natural movement preserved
Photos show Grand Plastic Surgery patients after a PDO thread lift, shared with consent, as an illustrative example. Results of Square Jaw Botox differ and vary by individual.
When to Expect Results
Initial effects are usually noticeable within 1 to 2 weeks, with visible jawline slimming developing over 3 to 6 weeks as the muscle gradually reduces in size.
Back to routine
Little or no downtime.
Effect begins
Muscles start to relax.
Full result
The final effect is visible.
Maintenance
Repeat when movement returns.
Results typically last 4 to 6 months, depending on muscle activity, dosage, and individual metabolism. Maintenance treatments may help sustain facial contour results.
Preparation & aftercare
Before treatment
- Tell your doctor about all medications and supplements you take
- Ask your doctor about pausing aspirin or blood-thinning supplements to reduce bruising
- Avoid alcohol the day before treatment
- Come without makeup on the treatment area if you can
- Tell us if you are pregnant or breastfeeding
- Plan important events 1–2 weeks after treatment
After treatment
- Avoid excessive chewing or gum for 24 hours
- Avoid massaging the jaw area for 24 hours
- Avoid strenuous exercise for 24 hours
- Remain upright for at least 4 hours post-treatment
Chief Director · Plastic Surgeon
Dr. Rhee Se Whan
Non-surgical treatments at Grand are planned by Dr. Rhee’s team with the same understanding of facial anatomy used in surgery — so results look refreshed, never overdone.
- M.D. & Master’s, Hanyang University; Adjunct Professor of Plastic Surgery
- Plastic surgery training, Northwestern University Hospital, Chicago
- MIPS Academic Chair; invited lecturer, 2019 Healthy Life Forum (Russian MOH)
- Specialising in facial lifting at Grand Plastic Surgery since 2004
Square Jaw Botox questions
Is Square Jaw Botox the same as masseter Botox?
Will Square Jaw Botox affect chewing?
How often should Square Jaw Botox be repeated?
How long do Square Jaw Botox results last?
How much does Square Jaw Botox cost in Korea?
Why choose Grand Plastic Surgery for Square Jaw Botox?
Find out if Square Jaw Botox is right for you
Send 3 photos (front, 45°, side) on WhatsApp. Dr. Rhee’s team replies with a personalised plan and estimate — in English.
Medically reviewed by Dr. Rhee Se Whan · Last updated October 2026 · This page is for general information and does not replace an in-person medical consultation.
