Jaw Botox vs fat-dissolving injection at a glance

Both treatments are used to create a slimmer, more defined lower face, and both are popular in Korea for the V-line look. The key is what is causing the width or fullness. Jaw Botox treats a strong chewing muscle at the angle of the jaw, while a fat-dissolving injection treats soft fat under the chin or along the jowls.

Feature	Jaw (Masseter) Botox	Fat-Dissolving Injection
Technology	Botulinum toxin type A (Korean or imported brands)	Injectable solution that breaks down fat cells; formulations vary
How it works / target depth	Injected into the masseter muscle so it relaxes and shrinks over weeks	Injected into the fat layer, where it disrupts fat cells for the body to clear
Best for	Square jaw from muscle bulk; clenching and grinding	Small, pinchable fat under the chin or at the jowls
Comfort	A few quick injections each side	Several injections with stinging or burning that fades
Downtime	None	Swelling for 2–5 days; tenderness
Sessions	One; repeat every 4–6 months	Usually 2–4, a few weeks apart
Results appear	Slimming shows from about 2–4 weeks, peaks around 2–3 months	Gradual reduction after each session
Results last	About 4–6 months	Destroyed fat cells do not return; remaining cells can still grow with weight gain
Price from at Dernia	₩59,000 (both sides, Korean toxin)	₩69,000 (per area)

How jaw Botox works

The masseter is the strong chewing muscle at the back of the jaw. In some people it is naturally large or enlarged by clenching and grinding, which makes the lower face look square. Botulinum toxin injected into the muscle relaxes it, and over the following weeks the muscle gradually shrinks, softening the jaw angle into a slimmer, more tapered outline. Many people also notice less clenching. Repeat sessions every four to six months help maintain the effect. Our answer on how many units of jaw Botox you need explains dosing.

How fat-dissolving injections work

Fat-dissolving injections are placed directly into a small pocket of fat. The solution disrupts fat cell membranes, and the body clears the contents over the following weeks. Korean clinics use different formulations, some based on deoxycholic acid, the same active ingredient as an injectable approved in the United States for fat under the chin; your doctor will tell you which product is used. Swelling for several days is normal, especially under the chin, so plan sessions around important events.

Choose jaw Botox if…

Your jaw looks wide or square at the angle
You can feel a firm muscle bulge when you clench your teeth
You clench or grind your teeth
You want no downtime

Choose a fat-dissolving injection if…

You have a soft, pinchable double chin or fullness at the jowls
The fullness is fat rather than muscle or loose skin
You can plan for a few days of swelling after each session
You want a longer-lasting reduction of a specific fat pocket

Can you combine them?

Yes. Many lower faces have both a strong masseter and a little fat under the chin, so the two are often combined for a complete V-line result, sometimes on the same day. Our V-Line Contour Package(from ₩249,000) pairs jaw Botox and fat-dissolving injections with Shurink ultrasound lifting.

Cost comparison

At Dernia Clinic Myeongdong, jaw Botox starts from ₩59,000 for both sides with a Korean toxin, and fat-dissolving injections from ₩69,000 per area. Jaw Botox is a single session repeated every four to six months, while fat-dissolving injections usually need two to four sessions. See current plans on the jaw Botox price page and the fat-dissolving injection price page. Prices are in Korean won (KRW), exclude 10% VAT, and are confirmed at your consultation.

How our doctors decide

Your doctor feels the jaw while you clench to judge muscle size, pinches the area under the chin to judge fat, and checks for loose skin. Muscle bulk points to jaw Botox; soft fat points to fat-dissolving injections; laxity may point to ultrasound lifting instead.

Neither is given during pregnancy or breastfeeding. Toxin is avoided with certain neuromuscular conditions, and injections need extra care if you take blood thinners. Temporary chewing fatigue after jaw Botox is common and settles within weeks. See typical outcomes on the jaw Botox results page, browse more comparisons, or book a consultation and a licensed doctor will identify what is shaping your jawline.

How do I know if my wide jaw is muscle or fat?

Clench your teeth and feel the angle of your jaw. A firm bulge that hardens is usually the masseter muscle. Soft fullness under the chin or along the jowls that you can pinch is usually fat.

How soon does jaw Botox slim the face?

The muscle shrinks gradually, so slimming usually shows from about two to four weeks and peaks around two to three months. Results commonly last four to six months.

How much swelling should I expect after a fat-dissolving injection?

Swelling and tenderness for two to five days is normal, and under the chin it can look fuller before it improves. Plan sessions away from events and photos.

Is fat reduction from injections permanent?

Fat cells that are destroyed do not come back. Remaining fat cells can still enlarge with weight gain, so results last best when your weight stays stable.

Can I combine both in one visit?

Yes, they are often combined for a complete V-line result. Your doctor will confirm the plan and spacing at your consultation.

Treatments compared

Jaw (masseter) Botox — slims a square jaw
Fat-dissolving injection — reduces small fat pockets
Shurink Universe — ultrasound lifting for jawline definition

Price, results and reviews

Jaw Botox price in Seoul — Korean and imported toxins
Fat-dissolving injection price in Seoul — per-area pricing
Fat-dissolving injection results — session-by-session timeline
Jaw Botox review — our medical team's verdict

Areas and concerns

Jawline and V-line — all treatments for this area
Chin and double chin — options compared

More comparisons

Shurink Universe vs InMode — device-based contouring
Onda vs InMode — microwave vs RF for fat

Dernia Clinic Myeongdong

Jaw Botox vs Fat-Dissolving Injection: Which Is Right for You?