Guide

Why do jowls form?

Jowls develop as skin loses collagen and elasticity, fat pads shift downward, and supporting ligaments loosen. Bone changes in the jaw can also play a role. The result is a softer jawline and loose skin below the corners of the mouth. Because several layers are involved, the right treatment depends on which layer is most affected. Our sagging skin and jowls page explains this in more depth.

How does Thermage FLX work on sagging skin?

Thermage FLX uses monopolar radiofrequency to heat a broad volume of tissue evenly. Heat causes existing collagen to contract, which may give some tightening early on, and triggers new collagen production over the following months. Thermage works mainly on the skin and fibrous layers, so it is often chosen when laxity is in the skin itself rather than deep structural drooping.

How is Thermage different from Ultherapy for the lower face?

Both devices heat tissue to stimulate collagen, but they deliver energy differently. Thermage spreads radiofrequency heat across a broader, more superficial volume, so it tends to tighten skin evenly and improve texture. Ultherapy Prime focuses micro-focused ultrasound at set depths, including the SMAS layer that surgeons lift in a facelift. For jowls, the deciding factors are skin thickness, how much tissue has descended and whether you also want texture improvement. Our comparison of Ultherapy Prime vs Thermage FLX sets out these criteria side by side.

Who is a good candidate?

Adults, typically 30s to 50s, with mild to moderate laxity
People who want a firmer jawline without surgery or needles
Those who prefer minimal downtime
Patients maintaining results after other lifting treatments

Very heavy jowls or significant excess skin may respond better to thread lifting or surgical consultation. Thermage is not used during pregnancy or with implanted electronic devices.

What happens during treatment?

After consultation and cleansing, a temporary grid is applied. The doctor treats the face in multiple passes, focusing on the jawline, lower cheeks and neck as planned. Each pulse feels like a brief wave of deep heat with cooling. Settings can be adjusted. Most sessions take 45 to 90 minutes.

Afterward, mild redness and slight swelling usually fade within hours to a day. You can typically return to sightseeing in Hongdae the same day.

When will I see results?

Some people notice slight firmness right away, but the main change develops over two to six months as collagen rebuilds. Many patients repeat treatment about once a year. For a deeper look, read how soon results from Thermage appear. Results vary by individual.

Combining Thermage with other treatments

Re:berry designs combinations so that each treatment works on a different layer:

Ultherapy Prime: Targets the deeper SMAS layer; often paired with Thermage for layered lifting. See can Ultherapy and Thermage be done the same day.
Thread lifting: Provides immediate mechanical repositioning.
Jaw Botox: May refine the lower face shape.
Skin boosters: Support skin quality alongside lifting.

Alternatives

Ultherapy Prime for jowls for deeper structural lift
Sofwave for jowls for ultrasound collagen stimulation with shorter sessions
Dooth or Mint thread lifting for more immediate repositioning
Re:berry's Eternal Youth program for a multi-step plan

Side effects

Temporary redness, swelling, tenderness and tingling are the most common effects. Less common risks include blisters, burns, or temporary numbness. Rarely, fat loss or contour irregularity has been reported with radiofrequency. The doctor will explain risks before you decide.

Aftercare tips

Use a gentle cleanser and moisturizer for a few days
Apply sunscreen daily and avoid prolonged sun
Skip saunas, hot baths and intense exercise for the first day or two if the skin feels warm
Avoid strong exfoliants and retinoids for several days, or as advised

Thermage results are gradual, so it helps to take a photo before treatment and compare in good lighting after three months rather than checking daily in the mirror. Lifestyle factors such as weight changes, sun exposure and sleep also influence how long firming lasts.

Next steps

Pricing depends on shot count, area and plan, and is confirmed in writing at consultation. See Location & Hours or book via the Booking page.

Is Thermage or Ultherapy better for jowls?

They work on different layers. Thermage heats the skin and fibrous tissue broadly, which suits skin laxity. Ultherapy Prime targets deeper layers, including the SMAS, which may help with structural drooping. Many patients have both, either together or months apart. The doctor decides based on your tissue and goals.

Can Thermage replace a facelift?

No. Thermage can improve mild to moderate laxity, but it cannot remove excess skin or deliver the same degree of change as surgery. It is a non-surgical option for people who want gradual, natural-looking firming with minimal downtime. Expectations are discussed openly during consultation.

Can I fly after Thermage FLX?

Most people can fly the next day after Thermage because there is usually no wound or significant swelling. Keep the skin moisturized during the flight and use sunscreen on arrival. Mention your travel dates at consultation so aftercare can be tailored to your plans.