What causes a double chin?

A double chin is fullness under the jaw that blurs the line between your chin and neck. It is not always about weight. Some people store fat under the chin even when slim, because of genetics. Others have loose skin from aging or weight loss, prominent neck muscle bands, or a small or set-back chin that makes the area look fuller. Posture plays a role too: looking down at a phone creates a temporary fold that photos exaggerate. Often it is a mix of these factors, which is why the right treatment depends on the cause rather than on the device that is most popular this year.

How a double chin is assessed

At Dernia Clinic Myeongdong, your doctor checks your profile at rest, with your head tilted and while you swallow. A pinch test shows how much soft fat sits above the neck muscle. Your doctor will then describe your double chin as mainly:

Fat-driven: a soft, pinchable pocket with reasonably firm skin
Laxity-driven: loose skin with little fat, often with jowls
Structural: a short or receding chin that shortens the jaw angle

For a structural double chin, adding projection with chin filler can help more than reducing fat.

Treatment options for a double chin

Fat-Dissolving Injection

A fat-dissolving injection breaks down small, stubborn fat cells under the chin. Your doctor chooses it for a soft, pinchable pocket, usually over 2–4 sessions spaced a few weeks apart.

InMode Forma & Mini FX

InMode Forma & Mini FX uses radiofrequency to target small fat pockets and tighten the skin at the same time. It suits mixed fat and laxity and works best as a series with no downtime.

Onda Lifting

Onda Lifting uses microwave technology to reduce fat and firm the skin. Your doctor picks it for a fuller area where you want to avoid injections, with results building over 4–8 weeks.

Shurink Universe

Shurink Universe is Korean HIFU that tightens the skin under the chin and sharpens the jawline. It is chosen for mild laxity, for maintenance, or after fat reduction to help skin settle.

Ulthera Prime

Ulthera Prime is FDA-cleared to lift skin under the chin and on the neck. Your doctor chooses it when loose skin, rather than fat, is the main cause, and you want one session with results that commonly last around a year.

Comparing your options

Treatment	Best when	Downtime	From price
Fat-Dissolving Injection	A soft, pinchable fat pocket	Swelling for 2–5 days	₩69,000 (per area)
InMode Forma & Mini FX	Mixed fat and loose skin	None	₩129,000 (per session, one area)
Onda Lifting	A fuller area, no injections	None to mild swelling	₩199,000 (from 30,000 J)
Shurink Universe	Mild laxity or maintenance	None	₩149,000 (300 shots)
Ulthera Prime (Ultherapy)	Loose skin is the main cause	None to mild swelling or tenderness	₩390,000 (100 lines)

Prices are in Korean won (KRW), exclude 10% VAT, and are confirmed at your consultation. You can compare every treatment on our price list.

Combination plans

The most natural result usually comes from reducing fat first and then tightening. A common plan is fat-dissolving injections or Onda, followed by HIFU once swelling settles. Our V-Line Contour package combines fat-dissolving injections, Shurink and jaw Botox for a slimmer lower face. To weigh the devices, read Shurink Universe vs InMode.

At-home care and prevention

Keep your weight stable; remaining fat cells can still enlarge if you gain weight.
Raise your phone to eye level rather than looking down for long periods.
Use SPF and a retinoid on the neck, not just the face.

Planning treatment during a trip to Seoul

HIFU, InMode and Onda have little or no downtime, so you can treat early and keep sightseeing. Fat-dissolving injections cause swelling and tenderness for 2–5 days, and a series means returning every few weeks or continuing at home. See the chin and double chin area guide, then book a consultation to plan sessions around your dates.

When to see a doctor first

A firm lump, a lump that moves when you swallow, or neck swelling that appears suddenly should be checked by a doctor, as it may involve the thyroid or lymph nodes. Fat-dissolving injections are not given during pregnancy or breastfeeding. Rarely, injections under the chin can temporarily affect the nerve that controls your smile, which is one reason they should be placed by a licensed doctor. RF devices are not used with a pacemaker.

Are fat-dissolving injection results long-lasting?

Yes, largely. Fat cells that are destroyed do not come back. The fat cells that remain can still grow if you gain weight, so stable weight matters for lasting results.

How many sessions do I need for a double chin?

Most people need 2–4 injection sessions spaced a few weeks apart. Device treatments such as InMode are also done as a series, while Ulthera Prime is usually a single session.

Will my skin sag after the fat is gone?

Skin with good elasticity usually adapts. If your skin is already loose, your doctor will add HIFU or RF tightening to help it settle smoothly.

Can a double chin be caused by my chin shape?

Yes. A small or receding chin shortens the jaw angle and makes the area look fuller. In that case, chin filler for projection may help more than fat reduction.

Is there downtime?

Device treatments have little or none. After injections, expect swelling, tenderness and sometimes numbness for 2–5 days, which a scarf or high collar can hide.

Treatments for a double chin

Fat-dissolving injection — targets small fat pockets
InMode Forma and Mini FX — RF fat targeting and tightening
Onda Lifting — microwave fat reduction
Shurink Universe — HIFU for definition

Compare and prices

Onda vs InMode — which device suits your fat and skin
Jaw Botox vs fat-dissolving injection — muscle or fat
Fat-dissolving injection price — costs per area

Related concerns and areas

Jowls — fullness along the jawline
Square jaw — slimming a wide jaw
Chin and double chin — all options for this area

Packages

V-Line Contour package — three contouring treatments in one plan

Dernia Clinic Myeongdong

Double Chin Treatment in Seoul