Masseter Botox Gangnam, Seoul
Masseter botox relaxes the muscle you clench to chew, and that single change carries two results. A wide, square lower face softens as the overworked muscle reduces, while the night-time grinding and jaw tension driven by the same clench ease along with it, just steps from Gangnam Station in Seoul.
Masseter Botox
Masseter Botox
Masseter Botox · Gangnam Seoul
Masseter botox relaxes the muscle you clench to chew, and that single change carries two results. A wide, square lower face softens as the overworked muscle reduces, while the night-time grinding and jaw tension driven by the same clench ease along with it, just steps from Gangnam Station in Seoul.
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Incheon AirportWhat does masseter botox do: is it for a square jaw or for teeth grinding?
Both, from the same injection. Masseter botox places botulinum toxin into the muscle you clench to chew, dialing down the signal that keeps it contracting. Used less, the muscle shrinks a little, so a wide lower face gradually narrows over four to eight weeks. The same quieting of the clench eases night-time grinding and the morning jaw ache that comes with it. At RE:BERRY Gangnam the dose is chosen to relax the muscle without taking away normal chewing, and one licensed physician runs the case from the first clench-test through review.
Effects & Progress
Effects & Progress
Relaxing the masseter carries two results from one injection. The overworked muscle reduces so a square jawline softens, and the same quieting of the clench eases the grinding and jaw tension behind it.
Injections take only minutes with no wound. Makeup, meals, and travel are fine the same day. Nothing looks different yet; the result is on a muscle's timeline.
The masseter begins to relax. Many guests notice the first easing of jaw tension and grinding, and some feel mild, temporary chewing fatigue that settles on its own.
The main phase. The muscle reduces from lighter use, the square lower face visibly softens, and night-time grinding settles into a quieter pattern over roughly 4-8 weeks.
Maintenance period. The effect lasts 4-6 months before the masseter regains activity; RE:BERRY will guide the repeat interval that keeps both your contour and your grinding relief.
Treatment Process
Masseter Botox in 4 Steps, from Clench Test to Aftercare
※ Illustrative images are AI-generated to help explain the treatment process.Effects & Progress
Effects & Progress
A wide, square lower face and a night-time grinding habit often share one cause: an overdeveloped masseter, the muscle that closes the jaw when you chew and clench. Masseter botox lowers the nerve signal telling that muscle to contract, and one change produces two outcomes. Used less, the masseter gradually reduces and the jawline softens. The weaker clench quiets the grinding that wears teeth and the tension that leaves the jaw sore. The contour result is anatomical, drawn from your own muscle with nothing removed or implanted, and the functional result rides on the same mechanism.
This is a non-surgical treatment that works on a muscle's timeline. The relaxing effect begins in roughly 1-2 weeks, and the visible slimming develops over about 4-8 weeks as the masseter reduces from lighter use. The easing of grinding and jaw tension is often noticed even sooner. There is no incision and no downtime that costs a trip; the injection itself is minutes. Guests traveling for a specific date are told to expect the contour to develop over the two months after the session, not the same week. Response speed and magnitude are honestly individual.
The two sides of a jaw are seldom identical, and treating them as if they were is how a result comes out lopsided. The physician maps the dose to each masseter separately, so a side that is stronger or bulkier gets weighted accordingly and a slightly uneven jaw can be brought closer to symmetry. Subtle, temporary asymmetry can appear while the two sides settle at their own pace, and it evens out as the effect matures. The follow-up review is when any small adjustment is considered, and the balance is judged from how your own muscle responded.
Masseter botox is a maintenance treatment, and its temporary nature is part of the plan. The muscle-relaxing effect typically lasts 4-6 months, after which the masseter gradually regains activity, the contour softens back toward baseline, and grinding can slowly return. A repeat session extends both results, and many guests schedule it before the effect fully fades, often two to three times in the first year and then less frequently as the muscle stays relatively reduced from repeated treatment. The physician sets the interval from how your own muscle behaves, not a fixed calendar.
Treatment Process
Masseter Botox in 4 Steps, from Clench Test to Aftercare
※ Illustrative images are AI-generated to help explain the treatment process.
Two Results on One Timeline: What Masseter Botox Delivers and When
- A softer lower face: as the overworked masseter is used less and reduces, a wide, square jaw narrows into a smoother line. The change is anatomical, from your own muscle, with nothing removed or implanted
- Quieter clenching: the same signal reduction that shrinks the muscle also calms night-time grinding and the daytime tension that leaves the jaw tired, so the contour and the relief arrive together
- Chewing kept intact: the dose is set to relax the masseter, not disable it, so enough muscle activity remains that you eat normally once any first-week fatigue settles
- Balance read from your own jaw: because the left and right masseter rarely match, the split is planned per side so the finished contour and the bite stay symmetrical
- No downtime that costs a trip: injections take minutes, there is no wound, and a same-day flight is fine. The only thing that unfolds slowly is the result
- One physician the whole way: the doctor who runs the clench test maps the dose, places every injection, and reads your review, so nothing about your two goals is handed off mid-course
| Timeline | What to Expect |
|---|---|
| Injections done in minutes; makeup and travel are fine the same day. Nothing looks different yet: muscle takes weeks, not hours, to respond | |
| The masseter begins to relax; some guests notice mild, temporary chewing fatigue and often the first easing of jaw tension before any width change shows | |
| The main phase: the muscle reduces from lighter use, the lower face visibly slims, and night-time grinding settles into its quieter pattern | |
| The relaxing effect holds through this window, then the masseter gradually regains activity; a repeat session maintains both the contour and the grinding relief |
Masseter Botox vs Filler vs a Lifting Device: Matching the Tool to a Wide Lower Face
| Criteria | Masseter Botox (RE:BERRY Gangnam) | Facial Filler | Energy Lifting (HIFU / RF) |
|---|---|---|---|
| What it targets | The masseter chewing muscle | Volume loss or a recessed chin | Skin laxity and mild sagging |
| Why a jaw looks wide | Overdeveloped muscle from clenching or grinding | Not the cause it addresses | Not the cause it addresses |
| Functional side benefit | Eases teeth grinding and jaw tension | None | None |
| How the change arrives | Gradually, over 4-8 weeks as muscle reduces | Immediately, by adding volume | Builds over weeks as collagen forms |
| Sessions | One, repeated every 4-6 months at first | One, topped up as it resorbs | Usually one per cycle |
| Downtime | None | Possible brief swelling or bruising | None to a day of redness |
| Best when the width is | Firm muscle that hardens on a clench | A short chin unbalancing the jaw | Loose skin along the jawline |
Why This Matters
A wide lower face has more than one cause, and the right treatment depends on which one you have. Masseter botox works only when the width is muscle: the firm bulge that hardens when you bite. If the fullness is soft-tissue or the issue is a short chin throwing off the balance, filler is the better tool; if the jawline is sagging and not square, a lifting device is. The clench test at RE:BERRY Gangnam exists to sort this out before anything is injected.
What sets masseter botox apart from the other two is that it carries a functional result alongside the cosmetic one. The same reduction in clenching signal that slims the jaw also quiets the grinding that wears teeth and the tension that leaves the jaw sore in the morning. Filler and lifting devices change how the face looks; only relaxing the masseter also changes what the muscle does at night.
KHIDI's 2025 international patient survey found 41.4% of respondents rank keeping the same doctor throughout as their leading criterion. At RE:BERRY Gangnam the physician who palpates your clench designs the dose, injects every point, and reads your review: there is no handoff between the person who plans your two goals and the person who carries them out.
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Masseter Botox at RE:BERRY Gangnam: What a Plan Includes
Your Medical Director
Dr. Yoon-Gon Ryu
- Medical Director, RE:BERRY Aesthetic Clinic Gangnam — Korean MOHW Medical License No.131644
- Manufacturer-appointed KOL invited to teach injection and energy-device technique to Korean peers
- Regular Member, Korean Academy of Aesthetic Medicine
- Co-manages every case with Dr. Yejin Oh (Korean MOHW Medical License No.144238)
- Featured in Authority Magazine (2026)
Medically reviewed by Dr. Yoon-Gon Ryu, CEO / Medical Director, RE:BERRY
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The Evidence Behind Relaxing the Masseter
Botulinum toxin type A works at the neuromuscular junction: it prevents nerve terminals from releasing acetylcholine, the chemical messenger that tells a muscle to contract. Deprived of that signal, the masseter contracts less, and a muscle that contracts less is a muscle that is used less. Over the following weeks it undergoes the same disuse reduction any under-worked muscle would. So the slimming of the lower face is gradual, arriving over weeks, and it is anatomical: the muscle itself gets smaller, with no filling added.
The aesthetic outcome specific to the jaw angle is documented. A clinical study of botulinum toxin type A for mandibular contouring recorded measurable narrowing of the lower face after masseter injection, establishing the muscle-reduction mechanism as the basis for softening a square jaw. Dose-ranging and randomized controlled work on facial botulinum toxin has separately mapped how outcome and duration track with the amount delivered. That is the reason the physician at RE:BERRY Gangnam sets the masseter dose to your individual muscle and holds back enough to keep normal chewing.
Kim NH, Chung JH, Park RH, Park JB. The use of botulinum toxin type A in aesthetic mandibular contouring. Plast Reconstr Surg. 2005;115(3):919-930. doi:10.1097/01.prs.0000153236.79775.a0
Carruthers A, Carruthers J, Cohen J. A prospective, double-blind, randomized, parallel-group, dose-ranging study of botulinum toxin type A in female subjects with horizontal forehead rhytides. Dermatol Surg. 2005;31(4):414-422. doi:10.1097/00042728-200504000-00007
The functional side of the treatment rests on the same mechanism applied to the same muscle. Because botulinum toxin reduces the force of masseter contraction, the involuntary clenching that grinds teeth and leaves the jaw tense is quieted along with the muscle bulk. The evidence base for using botulinum toxin to reduce pathological muscle overactivity and for the safety of repeated facial injection is well established across controlled trials. That is why a slimmer contour and a calmer clench travel together: they are two effects of one injection, not two separate treatments.
Naumann M, Lowe NJ. Botulinum toxin type A in treatment of bilateral primary axillary hyperhidrosis: randomised, parallel group, double blind, placebo controlled trial. BMJ. 2001;323(7313):596-599. doi:10.1136/bmj.323.7313.596
Small R. Botulinum toxin injection for facial wrinkles. Am Fam Physician. 2014;90(3):168-175.
Questions International Guests Ask About Masseter Botox in Gangnam
Does masseter botox slim the jaw, treat teeth grinding, or both?
Both, from a single injection. The masseter is the muscle you clench to chew, and it drives night-time grinding as well as the width of a square lower face. Relaxing it with botulinum toxin reduces both at once: the muscle shrinks a little so the jaw narrows, and the clenching quiets so grinding and jaw tension ease. A jaw looks wide when that muscle is overdeveloped, so calming it is what softens the shape. At RE:BERRY Gangnam the physician asks which goal matters most to you and weights the dose accordingly.
Will I still be able to chew normally after the injection?
Yes. The dose is set to relax the masseter, not to disable it, so enough muscle activity remains for normal eating. Some guests feel mild chewing fatigue in the first week or two while the muscle adjusts, which settles on its own. If you eat something firm right after the session it is fine; the physician simply suggests going easy on very hard food for the first couple of days.
How does relaxing one muscle help with teeth grinding?
Grinding is the masseter contracting involuntarily, often at night. Botulinum toxin lowers the force of that contraction by reducing the nerve signal reaching the muscle, so the clench is weaker and the grinding quiets. Many guests notice the morning jaw ache easing before they see any change in width, because the functional relief and the contour change build on slightly different timelines from the same injection.
How long until I see a slimmer jaw?
It is gradual, following a muscle's timeline. Relaxation begins in roughly one to two weeks, and the visible slimming develops over about four to eight weeks as the masseter reduces from lighter use. If you are traveling for a specific date, plan for the contour to develop over the two months after the session, not the same week.
How long does masseter botox last?
The muscle-relaxing effect typically holds four to six months, then the masseter gradually regains activity and the contour softens back toward baseline while grinding can slowly return. Many guests schedule a repeat before that happens, often two to three times in the first year, then less frequently as the muscle stays relatively reduced. The physician sets your interval from how your own muscle responds.
How is masseter botox different from a filler for a wide jaw?
They fix different causes. Masseter botox reduces an overdeveloped chewing muscle, the reason a jaw can look wide when the width is firm muscle. Filler adds volume; it is used for a short or recessed chin that unbalances the jawline, not for muscle bulk. The clench test at RE:BERRY Gangnam sorts out which cause you have before anything is injected, because using the wrong tool will not change a jaw driven by the other one.
Can masseter botox make my face look uneven?
The left and right masseter are rarely the same size, so injecting an identical dose to both can leave a mismatch. That is why the physician maps the dose per side from your own jaw and does not simply split it in half. Temporary, subtle asymmetry can occur while the two sides settle at slightly different rates, and it evens out as the effect matures; the follow-up review is when any adjustment is considered.
Is there any downtime after masseter botox?
None that affects a trip. The injections take minutes, there is no wound to bandage, and makeup, meals, and a flight home are all fine the same day. The only thing that unfolds slowly is the result itself. For the first two days the physician suggests skipping jaw massage, prone sleeping right after, and very hard chewing: light precautions, not recovery.
Who is a good candidate for masseter botox?
Good candidates have a lower-face width that is muscle: a firm bulge that hardens when they clench. With or without teeth grinding and jaw tension. It is not scheduled during pregnancy or breastfeeding, or for certain neuromuscular conditions. If the fullness stays soft on a clench, the width is fat or skeletal shape, and the physician at RE:BERRY Gangnam will say so directly and map a different plan.
Does it hurt, and how are the injections done?
Most guests describe brief pinches, not real pain. A fine needle places the toxin into a few marked points across the lower-outer part of each masseter, and the whole set is over in minutes. The physician confirms the placement is even across both sides before you sit up, since balanced delivery is what keeps the finished contour and the bite symmetrical.
What is the aftercare once I fly home?
It is light. For the first few hours avoid massaging the jaw and do not lie face-down; for a day or two go easy on very hard food while the muscle begins to relax. A cold compress helps if the area feels tender. There is nothing to bandage and no activity restriction beyond that, and the tightening of the contour continues quietly over the following weeks.
Will masseter botox change my smile or the rest of my face?
It should not. The injection targets the lower-outer belly of the masseter, kept clear of the muscles that shape a smile and expression. Because it acts only on the chewing muscle, the effect stays local to the jaw; the rest of the face is unaffected, and the change you see is the lower-face width softening, with no loss of expression.
How do I book masseter botox as a foreign visitor?
Message RE:BERRY on WhatsApp with your goals: jaw slimming, grinding relief, or both. And your travel dates. A coordinator replies in English within a few hours to reserve a physician slot; the clinic is reservation-only for international guests and staff interpreters cover eight languages. Palpation, planning, and the injection fit into a single visit, and follow-up continues on WhatsApp after you fly home.
Where is the clinic, and how do I reach it from Gangnam Station?
RE:BERRY is inside KI Tower on Gangnam-daero, a two-minute walk from Gangnam Station Exit 10 on Seoul Metro Line 2. From Incheon Airport it is roughly 45 to 60 minutes by AREX plus subway or by direct taxi. Being steps from the station means a masseter botox appointment slots cleanly between the rest of a Gangnam itinerary.
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Book Your Masseter Botox Consultation in Gangnam
Tell RE:BERRY on WhatsApp whether you are after a softer jawline, relief from grinding and jaw tension, or both, and share your travel dates: a coordinator replies within a few hours with a physician slot. The doctor who runs your clench test designs the dose, places every injection, and reads your review, and nothing is scheduled until you confirm.
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Science Masseter botox: peer-reviewed references
Relaxing the masseter with botulinum toxin rests on a well-documented mechanism and outcome record. Kim (2005) reported measurable narrowing of the lower face after botulinum toxin type A injection for mandibular contouring, establishing muscle reduction as the basis for softening a square jaw. Dose-ranging and randomized controlled work on facial botulinum toxin (Carruthers 2005) mapped how effect and duration relate to the amount delivered, informing how the masseter dose is set to slim the muscle while sparing chewing. The wider evidence base for reducing pathological muscle overactivity and the safety profile of repeated facial injection (Naumann 2001; Small 2014) underpins the functional benefit: the same signal reduction that slims the jaw quiets the clenching behind grinding and tension.
- Kim NH, Chung JH, Park RH, Park JB. The use of botulinum toxin type A in aesthetic mandibular contouring. Plast Reconstr Surg. 2005;115(3):919-930. doi:10.1097/01.prs.0000153236.79775.a0
- Carruthers A, Carruthers J, Cohen J. A prospective, double-blind, randomized, parallel-group, dose-ranging study of botulinum toxin type A in female subjects with horizontal forehead rhytides. Dermatol Surg. 2005;31(4):414-422. doi:10.1097/00042728-200504000-00007
- Naumann M, Lowe NJ. Botulinum toxin type A in treatment of bilateral primary axillary hyperhidrosis: randomised, parallel group, double blind, placebo controlled trial. BMJ. 2001;323(7313):596-599. doi:10.1136/bmj.323.7313.596
- Small R. Botulinum toxin injection for facial wrinkles. Am Fam Physician. 2014;90(3):168-175.
These references shape how masseter botox is planned at RE:BERRY's Gangnam aesthetic clinic: palpation of the clenched jaw to confirm the width is muscle before any injection; a per-side dose set to the individual masseter and held back enough to preserve normal chewing; and follow-up timed to the four-to-eight week window when both the contour change and the drop in grinding become visible, under the same licensed physician. This information is for educational purposes only and is not medical advice.
How to Find RE:BERRY Gangnam
2 minutes from Gangnam Station Exit 10. B1–B2, KI Tower — the building with the all-black entrance you can't miss.
RE:BERRY Clinic Gangnam
B1–B2, KI Tower, 69-gil 8, Gangnam-daero, Seocho-gu, Seoul
서울시 서초구 강남대로69길 8, 지하1·2층 (KI타워)
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