Ulthera vs Thermage: Which Skin Tightening Fits You?

A randomized split-face trial comparing Ulthera’s microfocused ultrasound against Thermage’s monopolar radiofrequency found no statistically significant difference in sagging improvement through six months. The real decision in consultation is not which device wins, but which skin layer needs the energy, how deep it should go, and what gets recorded so your next visit can build on this one. I’m Dr. Kim Yeonjin, director at our Gangnam clinic, and this is how we actually make that call.

“Which one is better, Ulthera or Thermage?” is one of the questions I hear almost every day in consultation. The honest answer rarely fits into a single device name, and the clinical literature explains why.

What the Split-Face Trial Actually Found

Alhaddad, Wu, Bolton and colleagues ran a randomized, evaluator-blind split-face trial, published in Dermatologic Surgery in 2019. Twenty patients with mild to moderate skin laxity received microfocused ultrasound with visualization on one side of the face and monopolar radiofrequency on the other, on the same day, then were followed for six months. Laxity grades on both sides improved significantly starting at day 30 and held through day 90 and day 180. The difference between the two devices was not statistically significant at any of those checkpoints.

Twenty patients is a small sample, limited to mild to moderate laxity. The honest takeaway is narrower than “which device is stronger”: in this range of laxity, neither trial shows one device outperforming the other.

Improvement Shows Up on Different Timelines

A separate evaluator-blind trial by Jones, Guiha, Goldman and Wu, published in Dermatologic Surgery in 2017, compared the same two device categories on the neck in twenty patients with moderate laxity. The ultrasound side showed a significant improvement in texture and fine lines by day 30, sustained through day 180. The radiofrequency side reached a comparable level only by day 180. This comparison is summarized in a 2025 narrative review by Pavicic and colleagues in the Journal of Cosmetic Dermatology.

For a patient flying home two or three months after treatment, that timing gap matters. Ask in consultation what your specific area is expected to look like at 30 days, 90 days and 180 days, so you know when to schedule a follow-up photo or a return visit.

Two Different Ways of Delivering Heat

The two devices work on entirely different principles, putting energy into the skin in ways that decide where each one gets used.

Microfocused ultrasound concentrates sound waves at a single focal point, creating a thermal coagulation point at a chosen depth. According to the 2025 review by Pavicic and colleagues, the technology targets the deep dermis and the superficial musculoaponeurotic system, the fibrous layer that supports facial structure, at depths of 1.5mm, 3.0mm or 4.5mm, reaching focal temperatures of 60 to 70 degrees Celsius. The clinical trial protocol for Ulthera Prime registered with ClinicalTrials.gov lists FDA-cleared treatment depths of 1.5mm, 2.0mm, 3.0mm and 4.5mm, guided by a real-time imaging feature the manufacturer calls DeepSEE.

Monopolar radiofrequency heats a broader volume at once. A 2025 protocol paper in the Journal of Cosmetic Medicine describes dermal and subdermal temperatures rising to 40 to 65 degrees Celsius, which contracts existing collagen immediately and triggers new collagen formation over the following months, with roughly 67 degrees Celsius in the dermis considered optimal for remodeling. The same paper notes that surface temperature must stay between 38 and 42 degrees Celsius to protect the epidermis. A porcine skin study in the Journal of Cosmetic Dermatology reported a similar pattern: dermal temperatures selectively held between 50 and 60 degrees Celsius while the surface stayed below 42 to 45 degrees Celsius. That is why continuous surface cooling and pulse spacing are built into the radiofrequency protocol rather than an afterthought.

	Ulthera (microfocused ultrasound)	Thermage (monopolar radiofrequency)
Energy delivery	Focused ultrasound, point-by-point coagulation	Broad-volume heating across the treated area
Primary depth	1.5mm, 3.0mm or 4.5mm, including the SMAS	Dermis and subdermal tissue
Target temperature	60 to 70°C at the focal point	40 to 65°C in the dermis, about 67°C optimal for remodeling
Surface management	Energy passes through the epidermis largely unaffected	Surface held at 38 to 42°C with active cooling
Reported improvement timing	Significant texture gains reported by day 30 in the neck trial	Comparable neck results reported by day 180
First FDA clearance	2009, eyebrow lift	2002, facial wrinkles

Sagging and fine lines often start in different layers, and treating one does not automatically address the other. I go into that layer-by-layer distinction in more detail in our newsroom’s piece on why lifting results take 90 days to fully set in.

Where Diagnosis Changes the Answer

Both trials cited above enrolled patients with mild to moderate laxity only. Reviews of the broader energy-based device literature repeatedly point to the same conclusion: patient selection and expectation-setting drive satisfaction more than device choice itself. If your skin shows significant excess volume or a marked drop in supporting structure, we talk through what an energy-based device can realistically change before we talk about which one.

A single session is not always the end of the plan, either. A split-face study combining microfocused ultrasound with radiofrequency microneedling found that one session alone did not always produce a clear improvement in wrinkles or laxity. That is one reason we set the total number of sessions, the interval between them, and what we are checking for at each one before you leave the consultation.

Five Decisions We Settle Before You Leave the Room

A consultation that does its job ends with five specific things decided, not just a device name.

1. A diagnosis with numbers and imaging attached. We record which area and which layer led us to a given choice, so it can be compared at your next visit.
2. Treatment depth and shot count. For Ulthera, that means which of the 1.5mm to 4.5mm depths apply to which zone. For Thermage, it means how many passes over which area.
3. Combination and sequencing. Whether both devices are used together, spaced apart, or paired with a skin booster, and in what order.
4. Pain and recovery expectations. How much redness and swelling to expect immediately afterward, how long it typically lasts, and what to avoid during that window.
5. Documentation for the next visit. Depth, energy setting, shot count and treated area, kept on file so the next visit can adjust the plan instead of starting over.

How We Sequence a Gangnam Consultation

We diagnose first and choose the device second. Once the diagnosis identifies which layer and depth need attention, that finding decides the device. The same clinician who designs the plan in consultation also performs the treatment, so any adjustment made in response to how your skin responds during the session is recorded by the person who made the call.

I trained at Seoul National University’s graduate school and Seoul National University Hospital. I am on faculty for Allergan’s Juvederm and Botox programs, and I hold Key Doctor status for Potenza and Ulthera. I also lecture for a clinical cosmetic medicine association in Korea and hold full membership in a Korean aesthetic surgery and laser medicine society.

Japanese, Chinese and English-speaking interpreters are on-site at our Gangnam clinic for patients visiting from abroad. If you are coming from outside Korea, message our consultation channel on KakaoTalk, LINE or WeChat two to three days ahead to reserve a slot. Same-day requests are worth asking about through the same channel, since availability varies.

Recovery Without Losing Your Trip

Our Gangnam clinic operates inside the UH FLAT SIGNATURE Gangnam hotel building, as an on-site amenity rather than a separate facility across town. The consultation room, treatment room and recovery space are all in the same building. The oxygen chamber and vitamin IV drip are provided at no charge to hotel guests, so recovery care is an elevator ride from the room where you were treated rather than a taxi ride across the city.

That same layout shortens the distance if something feels off after treatment. Redness or swelling that seems to be getting worse, rather than settling, is worth a follow-up visit before you fly home. I cover what that process looks like in our newsroom article on getting seen quickly after a procedure in Seoul.

FAQ

Can Ulthera and Thermage be done in the same visit?

Sometimes, since they act on different layers. Whether we do both on the same day or space them apart depends on your skin thickness, how much recovery time you have, and how much discomfort you are comfortable with. We do not lock in a combination before the diagnosis.

How many sessions before I can judge the result?

A split-face study combining microfocused ultrasound with radiofrequency microneedling found that a single session does not always produce a clear improvement in wrinkles or laxity. Setting the total number of sessions and what to check at each one in advance makes it easier to judge whether the plan is working.

How do my treatment records help on the next visit?

If your depth, energy setting, shot count and treated area are on file, we can tell what to keep from the last plan and what to change. Patients who visit from other countries tend to have longer gaps between visits, and without records, each visit effectively restarts from zero.

How long do redness and swelling last?

It varies by area and energy setting, but redness and swelling immediately after treatment typically settle within one to two days. Let us know your flight dates and any commitments in advance, and we adjust the settings around that window.

What does the diagnosis actually involve?

We check your skin condition and take a history to identify which layer is driving the change you are concerned about, then choose the treatment depth from there. The result is kept on file as the reference point for your next visit.

Before You Book

Whether Ulthera or Thermage fits you is a question only the diagnosis can answer. If you let us know your travel dates, the areas you are concerned about, and any past procedures before you arrive, we can move through diagnosis and finish the design work inside the consultation itself.