Ultherapy or Thermage FLX? How a Dermatologist Chooses in Apgujeong

Dr. Chang-hyun Kim, M.D. • October 26, 2026

Share this article

Almost every lifting consultation at Oaro Dermatology Clinic in Apgujeong begins with the same question: Ultherapy or Thermage FLX? Both are genuine, FDA-cleared, non-surgical devices, both are performed here by a board-certified dermatologist, and both are frequently recommended together. Yet they work on different layers of the face, and choosing well depends on what has actually changed in your skin. This short guide explains how we decide.

1. Two devices, two layers

Ultherapy delivers micro-focused ultrasound to the SMAS, the fibrous layer that surgeons tighten during a facelift, about 4.5 mm below the surface. It is a lifting device: it suits a softening jawline, early jowls, a heavy brow and loose skin under the chin. Thermage FLX heats the dermis and upper fat with monopolar radiofrequency across a broad area. It is a tightening device: it improves skin quality, fine crepiness, the eye area and overall firmness. In practice, laxity of the contour points toward Ultherapy, while laxity of the skin surface points toward Thermage FLX.

2. What the examination tells us

During the consultation we assess skin thickness, fat volume, the depth of the nasolabial folds and how the tissue moves when gently lifted. Thin skin with little fat often responds better to Thermage FLX at conservative settings; a well-defined face that has begun to drop along the jaw usually benefits more from Ultherapy lines placed precisely with real-time imaging. Age matters less than tissue behaviour. Patients in their thirties sometimes need Ultherapy for early jowling, while patients in their fifties with good bone support may prefer Thermage FLX for texture.

3. Combining them, and the order

Many patients at our Cheongdam clinic do both within the same year. When combined, Ultherapy usually comes first to reposition the deeper layer, with Thermage FLX scheduled several weeks later to refine the surface. Collagen stimulators such as Juvelook or Sculptra, and skin boosters such as Rejuran, can be added to improve skin quality between sessions. Downtime for both devices is minimal, which makes them practical for international visitors who need to fly home within days.

Conclusion

The right answer is rarely the device you read about last; it is the one matched to your layer of laxity by a dermatologist who has examined you. Read the detailed guides to Ultherapy and Thermage FLX, compare all lifting options on our laser and lifting page, or book a consultation in Apgujeong.

Recent Posts

By Dr. Chang-hyun Kim, M.D. • October 26, 2026
Three popular skin boosters in Seoul compared by what they do: Rejuran repairs, Juvelook builds collagen, Skinvive hydrates. How a dermatologist in Apgujeong matches them to skin.
By Oaro Dermatology Clinic • October 26, 2026
Which treatments fit a 5-day or 10-day stay in Seoul, what to do first, and how long before a flight to book lasers, fillers and boosters at a dermatology clinic in Apgujeong.