Masseter Botox in Seoul: Price, Units, What Changes

Masseter Botox is the injection people ask me about most when they land in Seoul with a square jaw they have been photographing from every angle. The masseter is the chewing muscle at the back corner of the jaw. When it is overbuilt, the lower face looks wide and heavy no matter how slim the rest of you is. Relaxing it lets the muscle shrink, and the jawline narrows into the softer V shape that is the reason most visitors come to a Korean clinic in the first place.

At Muse Clinic Myeongdong the jaw Botox list starts at from ₩19,000 (excl. 10% VAT) for a first-visit 50-unit session. Below is what actually happens, who it suits, what changes the price, and the honest timeline, so you can decide before you message us.

Who masseter Botox is for (and who it is not for)

The treatment works on muscle. If you clench your teeth and feel a firm bulge rise at the back of your jaw, that is the masseter, and relaxing it will narrow that area. Our list describes the typical patient as someone with a square jawline, overly built jaw muscles, or someone who wants a sharper line or a V-line.

If the width is bone, or the problem is loose skin under the jaw, Botox will not move it. In those cases I would talk about Shurink Universe for tightening or a contour injection for fat, and I say so at the consultation rather than injecting something that will not show.

• Square or wide lower face that looks wider when you clench
• Overdeveloped jaw muscles from grinding, gum, or a hard-food diet
• Wanting a softer V-line without surgery or downtime
• Not a match: bony jaw width, sagging skin, or a lower face that is mostly fat

How jaw Botox works at Muse: the 10-minute visit

A structured consultation with an interpreter comes first, then the treatment itself is planned and performed one to one by the head doctor. The steps on our list are simple: consultation, an ice roller to numb the skin, a check of the product's originality and correct dosage in front of you, then the injections. The injection part takes about 10 minutes.

1. 01Consultation: I ask you to clench, feel the muscle on both sides, and mark the injection points.
2. 02Ice roller over the jaw so the needle is barely felt.
3. 03You see the vial and the measured dose before it goes in. Genuine product, correct dose is the clinic's first motto.
4. 04A few small injections per side, evenly across the thickest part of the muscle.
5. 05Done. No dressing, no downtime. You can go back to your shopping.

Masseter Botox price in Seoul: options and what changes the number

The price difference on our list comes from two things: the product (standard Korean-made toxin versus Coretox, a premium Korean toxin chosen for a low risk of resistance) and what is bundled (the V-Line packages add a Gold Acu contour injection and a tightening injection). Every number is the same one a Korean patient sees. Prices exclude 10% VAT.

If you plan to repeat the treatment over years, the resistance point matters more than the ₩25,000 gap. If this is a one-off before a wedding or a trip photo, the standard option does the job. I will tell you which I would pick for your case rather than upsell by default.

Masseter Botox before and after: the honest timeline

Visitors often fly home before anything is visible and worry it did not work. It did; the muscle simply has not shrunk yet. Here is the sequence I describe at every consultation. Results and how long they last vary from person to person.

Side effects and the part clinics skip

Jaw Botox is a routine injection, but every procedure carries the possibility of side effects, and you should hear them before you agree. The common ones are a small bruise, a bump at an injection point, and a few days of heavier-feeling chewing while the muscle adapts. Less common: a temporary asymmetric smile if toxin drifts toward the muscle that pulls the mouth corner, which settles as the effect wears off.

• Bruising or a tender spot at an injection point: a few days.
• Chewing fatigue with very hard or chewy food in the first weeks.
• Cheek hollowing if the dose is too high for a slim face: this is why dose is decided by feel, not by a fixed number.
• Temporary smile asymmetry: uncommon, temporary, and avoided by injecting low and lateral on the muscle.

Why visitors book jaw Botox at Muse Clinic Myeongdong

Three things we put in writing rather than promise. One price list, identical to the Korean price: there is no foreigner menu, and the whole list with every option is published on the treatments page. Interpreters in the clinic, in English, Japanese and Chinese, who stay with you from consultation through treatment. The head doctor consults and treats: after the structured consultation the plan is made and performed one to one by Dr. Sarang Lim.

Practical details for a trip: the clinic is a one-minute walk from Myeongdong Station Exit 5, across from the Shinsegae side of Hoehyeon Station, on the 3rd floor of the building with a Twosome Place café at street level. We are open Monday to Friday 10:00–20:00 and Saturday to Sunday 09:00–15:00, so a weekend slot between shopping is realistic.

If your goal is a narrower lower face overall, the V-Line package pairs the jaw Botox with a Gold Acu contour injection and a tightening injection in one sitting. If the width you dislike is under the chin rather than at the jaw angle, read our note on face contour injections instead; it is a different problem with a different tool.