Ultherapy vs Thermage for Double Chin

Quick answer: For a double chin, Ultherapy is usually better than Thermage FLX if the cause is sagging skin and tissue under the jaw, because it lifts the deep support layer. Thermage FLX helps when the neck skin is thin and crepey. If the double chin is mainly fat, neither device is ideal; InMode Mini FX or fat-dissolving injections in Seoul usually work better.

Ultherapy vs Thermage for double chin is a common question among visitors to Seoul who have seen dramatic side-profile photos online. The truth is less simple: the two most famous lifting devices in Korea can improve a double chin, but only when the double chin is the kind they are designed to treat. This guide helps you work out which kind you have.

A double chin, called submental fullness by doctors, has several possible causes:

• Fat: a soft pad of fat under the chin, which can be present even in slim people because of genetics.
• Laxity: loosening of the skin and the deeper support layer, so tissue sags below the jaw line with age.
• Crepey skin: thinner, less elastic neck skin that folds when you look down.
• Anatomy: a short or recessed chin, or a lower position of the structures in the neck, makes the area look fuller.

Look straight ahead in a mirror and gently pinch the area under your chin. If you can grab a soft, thick roll, fat is likely a major factor. If the skin is thin and the fullness mostly appears when you look down or relax your jaw, laxity is more likely. Most people over 35 have some of both. A doctor confirms this at consultation.

Ultherapy is a micro-focused ultrasound treatment that uses real-time imaging to deliver heat to the SMAS and deeper tissue. Under the chin, it can tighten and lift the support layer, which reduces sagging and sharpens the angle between jaw and neck. It is usually the better of the two when the double chin is mostly laxity. See Ultherapy in Hongdae for more detail.

Thermage FLX is a monopolar radiofrequency treatment that tightens the dermis. It improves crepey, loose neck skin and fine horizontal neck lines, so it suits a double chin that looks worse because the skin itself has lost firmness. Learn more about Thermage FLX in Hongdae.

If fat is the main cause, Korean clinics usually start with treatments designed to reduce fat cells, then add lifting if the skin needs tightening afterward.

1. InMode Mini FX or FX: radiofrequency pulses that target small fat pockets under the chin and along the jaw, usually in a series of 3–5 sessions with little downtime.
2. Double chin injections: injections that break down a small amount of fat; often several sessions a few weeks apart, with swelling for a few days.
3. Fat-dissolving (contour) injections: similar contouring injections that can also be used along the jawline and cheeks.
4. Chin filler: if a short chin makes the neck look fuller, adding projection can improve the profile; compare options in chin filler vs double chin injection.

For a full overview of these options, read best treatments for double chin and jawline in Korea, or see how deep lifting compares with radiofrequency contouring in Ultherapy vs InMode.

The ranges below are approximate 2026 Seoul market prices per session, converted at about KRW 1,400 per US dollar. They are not the prices of any single clinic.

Costs depend on the number of lines, shots or sessions, whether only the under-chin area or the full lower face and neck is treated, genuine tips and products, whether the doctor performs the treatment, numbing and aftercare, and 10% VAT, which is usually added. For details, see Ultherapy cost in Korea and Thermage FLX cost in Korea, and check a clinic’s current price list for Hongdae figures.

Ultherapy and Thermage FLX typically need 0–1 day of downtime. The under-chin area may feel tender or slightly swollen for a few days after Ultherapy. InMode usually has little to no downtime. Double chin injections cause more noticeable swelling, often for several days, so plan them earlier in your trip.

• Lifting only: flying the next day is usually fine.
• With injections or filler: allow 2–3 days or more for swelling to settle.
• Precautions: tell the doctor if you are pregnant or breastfeeding, have metal implants or a pacemaker, or have thyroid or neck conditions. Results vary.

Hongdae is a convenient base for double chin treatments. Hongik Univ. Station connects Line 2, the Gyeongui–Jungang Line and the AREX Airport Railroad, which runs directly to Incheon and Gimpo airports.

• Language: ask whether English- or Japanese-speaking staff are available.
• Booking: many clinics take consultations by WhatsApp or KakaoTalk. Send a level side-profile photo and one looking slightly down, plus your travel dates.
• Details to confirm: who performs the treatment, the exact number of lines, shots or cc, and whether VAT is included.
• Timing: injections cause swelling, so plan them early in your trip and leave a buffer before flights.

You can compare lifting with Shurink Universe, Ultherapy in Seoul and InMode contouring, then check the current Hongdae clinic price list.

Ultherapy can reduce a double chin caused by sagging skin and tissue, because it tightens and lifts the deeper support layer under the jaw. It is not mainly a fat-reduction treatment, so a double chin caused by a thick fat pad usually responds better to InMode Mini FX or fat-dissolving injections, sometimes followed by Ultherapy for tightening.

Yes. Thermage FLX is often used on the neck and under the chin to tighten thin, crepey skin and soften fine neck lines. It works best when loose skin, rather than fat or deep sagging, is the main problem. Results build over 2–6 months and often last about 1–2 years.

Ultherapy and Thermage FLX are usually single sessions. InMode Mini FX is commonly done as a series of 3–5 sessions, and double chin injections often need several sessions a few weeks apart. A combined plan may take a few months, so visitors to Korea often start treatment in Seoul and continue on a later trip.

Thermage FLX is generally more comfortable under the chin, delivering heat with cooling and vibration. Ultherapy can feel sharper there because energy reaches deeper tissue near bone. InMode feels warm with short pulses. Numbing cream is commonly used, and the doctor can adjust settings for comfort.

If you plan to lose a significant amount of weight, it often makes sense to do that first, since weight change affects fat under the chin and can alter results. If your weight is stable and the double chin persists, it may be genetic fat or laxity, which targeted treatments can address. A doctor can advise on timing.

• Best Treatments for Double Chin and Jawline in Korea
• Chin Filler vs Double Chin Injection: Which Is Better for Jawline Contouring?
• Thermage vs Ultherapy vs InMode: Which Is Best for You?
• Ultherapy Cost in Korea: 2026 Price Guide

This guide is general information for international visitors, not medical advice. A doctor confirms suitability, dosage and number of sessions at consultation. Prices are approximate Seoul market ranges and change over time — always check the clinic's current price list. Last updated: October 2026.