Jaw Botox in Apgujeong, Gangnam Seoul
Board-Certified Dermatologist Top 2% in Korea 13+ Years
Jaw Botox · quick answer
What jaw Botox does, in one paragraph
Jaw Botox, also called masseter Botox, is an injection of botulinum toxin into the masseter, the chewing muscle at the angle of the jaw. As the muscle relaxes and gradually reduces in bulk, a square lower face can look slimmer and softer, and clenching may ease. At Ever Skin Clinic, a board-certified dermatologist checks how much of your jaw width comes from muscle rather than bone or fat before dosing, because Botox only changes the muscle.
Medically reviewed by Dr. Jieun Kim, M.D. Founder & Director, board-certified dermatologist. Dermatology residency at Hanyang University Hospital; adjunct professor, Hanyang University College of Medicine. Meet our dermatologists Last reviewed October 2026
- Target
- Masseter (chewing) muscle
- Best for
- Square lower face from muscle bulk; clenching or grinding
- Treatment time
- About 10 minutes
- Results
- Visible slimming from about 2 to 4 weeks, fuller effect by 2 to 3 months
- Duration
- Typically 3 to 6 months; regular sessions maintain the shape
The treatment
What is jaw Botox?
The masseter is one of the strongest muscles in the face. In people who chew hard foods, clench or grind their teeth, it can become enlarged and make the lower face look wide or square. A small dose of botulinum toxin reduces the muscle's activity, so over the following weeks it becomes thinner and the jawline looks more tapered.
Jaw Botox is one part of non-surgical facial contouring. When the chin or jawline also needs definition, our dermatologists may combine it with jawline and chin fillers.
What jaw Botox can and cannot do
- Can slim a lower face that is wide because of muscle bulk
- Can reduce the strain of clenching and grinding for many patients
- Cannot narrow a jaw that is wide because of bone structure
- Cannot lift sagging jowls; lifting treatments address laxity
Is it right for you?
Who is a good candidate?
The best candidates have a lower face that feels firm and bulges when they clench. During consultation, your dermatologist will ask you to bite down and will feel the muscle to judge its size, then choose the dose for each side, since the two masseters are often different.
We use licensed toxins, including imported brands such as Xeomin and approved Korean products, and will explain the options at your visit.
Jaw Botox may suit you if you
- Have a square or wide jaw from a strong masseter
- Clench or grind your teeth, especially at night
- Want a softer, V-line look without surgery
- Prefer a gradual, natural-looking change
- Are planning other contouring such as zygoma Botox or V-line injections
Your visit
What happens during treatment
The injection itself takes only a few minutes, so jaw Botox fits easily into a busy day or a short stay in Seoul.
- Assessment Your dermatologist examines the masseter at rest and while clenching and agrees the plan with you.
- Marking Safe injection points are marked on each side, away from the muscles that shape your smile.
- Injection A fine needle delivers the planned dose into each masseter, usually in a few small injections.
- Follow-up We explain aftercare and can review your result at about 2 to 4 weeks if needed.
Real patient · before & after
A softer lower face, without surgery
This patient had a wide lower face caused by a strong masseter muscle. After jaw Botox, the angle of the jaw looks narrower and the face shape softer, while her expressions stay natural.
The amount of change depends on how much of the width comes from muscle, so your dermatologist will tell you at consultation what is realistic for your face.
Photos are shared with the patient's consent and are not retouched apart from privacy blurring. Results differ from person to person and are not guaranteed.
See more before & after photosRecovery & safety
Recovery, side effects and aftercare
There is little or no downtime. Tiny red marks or a small bruise at the injection points can appear and usually fade quickly. Some patients notice that chewing tough food feels tiring for a few weeks while the muscle adapts.
Less common effects include temporary asymmetry or a change in the smile if the toxin spreads to nearby muscles, which is why careful placement matters. Tell your dermatologist if you have a neuromuscular condition, take certain antibiotics or are pregnant or breastfeeding.
Aftercare tips
- Avoid massaging or pressing the jaw for the rest of the day
- Stay upright for about 4 hours after treatment
- Skip saunas and intense exercise on the day of treatment
- Choose softer foods if chewing feels tired in the first weeks
- Book maintenance before the effect fully wears off to keep the shape
Questions we hear every day
Jaw Botox FAQ
Is jaw Botox painful?
Most patients feel only brief pinches as the fine needle enters the muscle, and the whole injection takes a few minutes. Numbing cream or ice can be used if you are sensitive. Discuss any concerns with your dermatologist beforehand.
How long does jaw Botox last?
Results typically last about three to six months, depending on the dose, your muscle strength and habits such as clenching. With regular sessions, many patients find the muscle stays slimmer for longer between treatments.
When will I see my face get slimmer?
Chewing may feel weaker within a week, but visible slimming usually begins around two to four weeks and continues for up to two to three months as the muscle reduces in size.
Can jaw Botox help with teeth grinding?
Relaxing the masseter can reduce the force of clenching and grinding for many people, which some find eases jaw tension. It does not replace dental assessment, so tell your dermatologist if you also see a dentist for grinding.
Can jaw Botox make my cheeks look hollow or saggy?
When dosed for your face, it should not. In patients with thin skin or existing laxity, too much reduction can make sagging more noticeable, which is why your dermatologist assesses skin quality and may suggest lifting or a lower dose.
Talk to a board-certified dermatologist in Apgujeong
Send us your skin concern and photos on WhatsApp. An English-speaking team member will reply and arrange your consultation.
Mon & Thu 10:00–19:00 · Tue & Fri 10:00–20:00 · Sat 10:00–16:00 · Closed Wed, Sun & holidays
