Masseter Botox in Seongsu, Seoul
Softening a square jaw and easing clenching with genuine toxin at exact doses
Masseter Botox relaxes the large chewing muscle at the angle of the jaw. At Seongsu Melting Clinic in Seongsu, Seoul, it is one of the most requested treatments for people who want a softer lower face or who clench their teeth.
Dr. Park Kyung-min uses genuine botulinum toxin products at the exact dose planned for you, and he examines the muscle before deciding how much, if any, you need.
What is masseter Botox?
The masseter muscle runs from the cheekbone to the lower jaw. When it is large, often from genetics, gum chewing or clenching, it can make the lower face look wide or square. Botulinum toxin temporarily reduces the nerve signal to the muscle, so it relaxes and, over several weeks, becomes less bulky.
The visible slimming effect usually appears gradually, often over about a month, because the muscle has to shrink. Relief from clenching-related tension may be noticed sooner.
How we approach masseter Botox at Seongsu Melting Clinic
Dr. Park asks you to clench and relax while he feels the muscle, checking its size, the thickest point and whether both sides are equal. This matters because a square-looking jaw can also come from bone shape or fat, and toxin only changes muscle.
Injection points and dose are then planned for each side. The clinic's standard is genuine products at the exact labeled dose, not diluted. If your face would benefit from other options, such as jawline contouring or MelFat for fullness under the jaw, he will explain that as well.
A good fit if…
- Your jaw looks wide or square due to a large masseter muscle
- You clench or grind your teeth and feel jaw tension
- You want a softer lower-face shape without surgery
- You are fine with maintenance every few months
Consider something else if…
- You are pregnant or breastfeeding
- You have a neuromuscular disorder
- Your jaw width is mainly bone structure (toxin cannot change bone)
- You have very thin cheeks and are concerned about hollowing
What to expect
After a brief consultation and examination, the injections take only a few minutes. You will feel a few small pinches. Minor redness or small bruises can occur and usually fade quickly. Some people notice mild chewing fatigue with tough foods for a short time.
Effects typically last about 3 to 6 months, varying by person and dose. Many people repeat treatment when the muscle begins to return. Pricing is explained at consultation.
Aftercare
- Avoid massaging or pressing the jaw for the rest of the day
- Stay upright for a few hours after treatment
- Skip saunas, intense exercise and alcohol on treatment day
- Limit very chewy foods for a while if your jaw feels tired
- Contact the clinic if you notice an uneven smile
A note from Dr. Park
One of Dr. Park's firm standards is using genuine products at the exact dose. He often tells patients that honest dosing is part of safe care, because results and duration depend on what is actually injected. He also prefers to check the face's structure first, so that toxin is used only when the muscle is truly the reason for the jaw shape.
Frequently asked questions
When will I see my jaw look slimmer?
Slimming is gradual and often becomes noticeable around a month after treatment.
Will it change how I chew?
Some people feel mild tiredness with hard or chewy foods for a short time. Normal eating is usually unaffected.
Can masseter Botox help teeth grinding?
It may reduce clenching-related muscle tension for some people. It does not replace dental assessment or a night guard if you need one.
Related treatments
Book a consultation at Seongsu Melting Clinic
Message us on WhatsApp or KakaoTalk, or call +82-2-468-7179. International patients are welcome to write to us in English.
- Address: 4F #403, Samjin Building, 113 Achasan-ro, Seongdong-gu, Seoul (Seongsu-dong 2-ga)
- Getting here: Seongsu Station (Line 2), Exit 2, about a 3-minute walk. Parking available.
- Hours: Mon–Fri 10:00–20:00 (lunch 13:00–14:00) · Sat 09:30–15:00 · Closed Sundays & public holidays
Directions, hours and booking options · Meet Dr. Park Kyung-min
Treatment plans, number of sessions and results vary from person to person and are decided after an in-person consultation. This page is general information, not a diagnosis or a substitute for medical advice.