Our verdict: Excellent value for a muscular square jaw; not effective for bone or fat
Best for: A wide lower face from masseter muscle bulk, teeth clenching and jaw tension
Not ideal for: Width from bone or fat, very lax lower faces, neuromuscular conditions
Comfort: A few quick pinches; numbing is rarely needed
Downtime: None; mild chewing fatigue for a few weeks is common
Value: Very good; low cost for a visible contour change lasting four to six months
Price from: ₩59,000 (both sides, Korean toxin)

Our take on jaw Botox

This is our medical team's honest assessment of jaw, or masseter, Botox. It is an editorial review by our doctors, not a collection of patient reviews, and it explains when we recommend it at Dernia Clinic Myeongdong and when we do not. Our other assessments are on the expert reviews hub.

Jaw Botox uses botulinum toxin to relax the masseter, the chewing muscle at the angle of the jaw. When that muscle is large, it widens the lower face; relaxing it lets the muscle shrink over several weeks, so the jaw looks slimmer and softer. In Korea, Botox is used as a general word for botulinum toxin, and you can choose between Korean brands and imported ones. In our doctors' view this is one of the best-value aesthetic treatments available in Seoul, provided muscle is really the cause of the width.

Pros

Affordable. Korean toxins make it very accessible in Seoul.
Quick. The injections take about ten minutes, with no downtime.
Visible contour change. A muscular jaw becomes noticeably softer and more tapered.
Eases clenching. Many people notice less jaw tension and tooth grinding.
Brand choice. You can choose a Korean toxin or an imported brand to suit your preference and budget.

Cons

Slow onset. Slimming appears over about four to eight weeks, often after you have flown home.
Temporary. The effect lasts about four to six months, so maintenance is needed.
Chewing fatigue. Tough foods can feel tiring for a few weeks.
Not for bone or fat. If width comes from the jawbone or from fat, toxin will not change it much.
Possible side effects. Rarely, an uneven smile or a slight hollowing above the jaw angle can occur; both are temporary.
Lax faces need care. In older faces with looser skin, a smaller muscle can make jowls more visible.

Who jaw Botox is best for

Our doctors see the clearest benefit in people with a square jaw caused by masseter bulk, which you can often feel as a firm bulge when you clench. It also suits people with clenching or grinding who want relief from jaw tension, and travelers looking for an affordable, no-downtime treatment that fits into a busy day in Myeongdong.

Who should consider something else

Width from fat under the jaw: a fat-reduction approach fits better. See Jaw Botox vs Fat-Dissolving Injection.
Width from loose skin and jowls: lifting such as Shurink Universe addresses laxity rather than muscle.
Width from bone: toxin cannot change bone structure; we will tell you honestly if that is the cause.
Medical reasons: avoid toxin during pregnancy or breastfeeding, with neuromuscular disorders such as myasthenia gravis, with infection at the site, or with certain antibiotics. Read is Korean Botox safe for brand and safety details.

Comfort and what it feels like

The doctor asks you to clench to locate the muscle, then gives a few quick injections on each side. Most people describe a brief pinch and a little pressure; numbing cream is rarely needed. Small red dots fade within an hour. Avoid massaging the area, lying flat or intense exercise for the rest of the day. You can fly the next day; our guide to flying after Botox and fillers covers the details.

Value for money

Jaw Botox at Dernia starts from ₩59,000 for both sides with a Korean toxin; imported brands and higher doses cost more, as shown on the jaw Botox price page. Prices are in Korean won (KRW), exclude 10% VAT, and are confirmed at your consultation. Dose depends on muscle size; read how many units of jaw Botox you need. For a visible change lasting four to six months, it is among the best-value treatments we offer, and it pairs well with HIFU in our V-Line Contour Package.

Our verdict

Jaw Botox is worth it when masseter muscle is the reason your jaw looks wide, or when you clench. It is not worth it when width comes from bone, fat or loose skin. See the jaw Botox results timeline to know when slimming appears, then book a consultation and your doctor will check the muscle and recommend a dose and brand.

Is jaw Botox worth it?

It is worth it if a strong masseter muscle is making your jaw look wide or if you clench your teeth. It is affordable in Korea and lasts about four to six months. It will not help if the width comes from bone or fat.

When will I see jaw Botox results?

Muscle relaxation starts within one to two weeks, but visible slimming usually appears at four to eight weeks as the muscle shrinks. Plan your expectations around that timeline.

Korean toxin or imported brand: which should I choose?

Korean toxins are widely used and cost less, while imported brands such as Botox, Xeomin and Dysport cost more. Your doctor explains the differences and helps you choose; dose and technique matter more than the brand name.

Will jaw Botox change my smile or chewing?

Chewing tough foods may feel tiring for a few weeks. Rarely, toxin affects a nearby muscle and causes a slightly uneven smile, which is temporary. Careful placement minimizes this risk.

How often should I repeat jaw Botox?

Most people repeat it every four to six months at first. Over time, some find they can space treatments further apart; your doctor will avoid unnecessarily frequent high doses.

Related treatments

Jaw Botox treatment guide — how it works and dosing
Fat-dissolving injection — for fat along the jaw
Trapezius Botox — a slimmer neck and shoulder line

Price, results and packages

Jaw Botox price in Seoul — Korean and imported toxins
Jaw Botox results — slimming timeline
V-Line Contour Package — toxin, HIFU and fat reduction

Areas and guides

Jawline and V-line treatments — all contour options
Korean Botox brands vs imported — how they compare
Is Korean Botox safe? — brands and safety
Can I get Botox while pregnant or breastfeeding? — safety first

Dernia Clinic Myeongdong

Jaw (Masseter) Botox Review: Is It Worth It?