HIFU in Seoul: How Ultherapy Prime and Shurink Universe Differ
Not a difference in which layer they target — what you can see during treatment, how well the tip fits the area, and how long the results last
"I keep seeing HIFU everywhere, but every clinic uses a different machine. Does it actually matter which one?"
This is one of the questions we hear most from people looking into lifting treatments in Seoul. Several machine names come up, the explanations all sound alike, and it is hard to tell what you should be comparing. The short answer: yes, the machine matters — not because one of them is better, but because one of them suits where your face has sagged. Here is what actually differs.
Why Does the Machine Matter If HIFU Works the Same Way?
The principle is the same. What differs is how each machine works with it.
HIFU — high-intensity focused ultrasound — works much like a magnifying glass concentrating sunlight on one spot. The ultrasound converges on a single point at a set depth under the skin. For an instant that point rises above 60°C, forming a thermal coagulation point that measures under 1mm in length, width and depth. Because the heat is concentrated at that focal point, the skin surface the ultrasound passed through is heated far less.
This holds whichever machine is used. That is why the common explanation that "each machine targets a different layer" is not accurate. Ultherapy Prime and Shurink Universe both aim at the SMAS — the sheet of connective tissue that supports the face from under the skin — and the dermis. The target is not what differs. What differs is how the energy is delivered there, and under what conditions.
What Is Different Between the Two HIFU Machines in Seoul?
What you can see during the session, how well the tip fits the area, and how long the results last.
| Ultherapy Prime | Shurink Universe | |
|---|---|---|
| Made by | Merz Aesthetics | CLASSYS (Korea) |
| Target layers | SMAS and dermis | SMAS and dermis |
| Choosing the depth | Three tips — 4.5mm, 3.0mm, 1.5mm | Fixed depth per cartridge — 4.5, 3.0, 2.0, 1.5mm |
| Imaging during treatment | Built-in ultrasound view of the layers under the skin | Not available |
| Modes | — | Ultra F (linear, wide areas) / Booster (round, curved areas) |
| When the change appears | From around week 4 → peak at 2 to 3 months | From around week 4 → peak at 2 to 3 months |
| How long the results last | About 6 months to 1 year | 3 to 6 months on average |
| Repeat interval | Once a year as standard | 3 sessions 4 weeks apart, then every 3 to 6 months |
| Anesthetic | Numbing cream applied and left to take effect before starting | No anesthetic for the 100-shot option; numbing cream from 300 shots up |
The imaging function shows the layers under the skin as an ultrasound image. It is a tool used during the treatment, not a device that measures your skin beforehand. Nothing is measured with it at the consultation stage to build a plan.
The way the depth is chosen also differs. With Ultherapy Prime the tip is swapped to work at 4.5, 3.0 or 1.5mm. With Shurink Universe each cartridge has its own fixed depth, and the choice is among 4.5, 3.0, 2.0 and 1.5mm. More than one depth is used within a single session. The doctor checks where you have sagged and how thick your skin is, then decides which depths to use and how much of the work goes at each.
How Do HIFU Machines Handle Curved Areas of the Face?
The shape of the surface the device touches is different.
A face is not flat. Some areas are wide and gently sloping, like the jawline and the cheeks. Others are narrow and curved — under the eyes, around the nasolabial folds, above the lip. HIFU needs the tip pressed flush against the skin for the ultrasound to converge at the right depth, so where the tip cannot sit flush, the ultrasound does not converge where it should.
The Booster mode on Shurink Universe uses a round cartridge for these curved spots. Ultra F uses a linear cartridge to cover wide areas. Ultherapy Prime has a broad contact surface, which makes wider areas like the jawline and the neck easier to cover.
So the choice follows the area that has sagged. Someone whose main concern is the jawline and the neck and someone who also wants the fine lines under the eyes and around the mouth addressed will not get the same answer. Neither one is the better machine — they are used in different places.
Thread lifting is a separate route. HIFU makes tissue contract with heat, while a thread lift hooks the sagged tissue and pulls it directly, so the approach itself is different. It comes up when sagging has progressed far enough that heat alone will not lift it, and which one suits you is settled in the consultation after checking how far the sagging has gone and how thick your skin is.
How Long Do HIFU Results Last in Seoul?
It depends on the machine, and if you are only in Korea once, that difference affects the choice.
With both machines the change shows up over time, not right after the session. The contour usually starts to change from around week 4 and is clearest at 2 to 3 months. Collagen takes time to rebuild where the heat worked. It means this is a treatment you have done in Seoul and notice once you are home.
How long the results last is where the two differ. Ultherapy Prime is generally expected to hold for roughly 6 months to a year, with once a year as the standard interval. Shurink Universe averages 3 to 6 months. The usual pattern there is three sessions 4 weeks apart, then one every 3 to 6 months after that.
If you are coming to Korea only once, that interval is hard to follow as written. In that case the plan is to have one session on this trip and add to it on a later one. How much a single session can do depends on how far the sagging has gone and what condition your skin is in, so it is worth settling that in the consultation beforehand.
For the flight home, Ultherapy Prime is cleared from the day after treatment. It does not break the surface of the skin, so bruising and swelling tend to be minimal, though temporary redness and tenderness to the touch are possible.
4 Things to Confirm Before HIFU in Seoul
Sorting out these four beforehand makes the consultation go quickly.
1. Point out where you have sagged Jawline, neck, cheeks, around the eyes. The area decides which machine and which mode fit. Narrowing it down from "my face has sagged" to a specific area speeds things up.
2. Ask how many machines the clinic has The consultation goes differently at a clinic with one machine than at a clinic with two. Where there is a choice, you can hear why this machine and not the other.
3. Tell us about any lifting treatments you have had When it was, which machine, how many shots — knowing that makes the assessment quicker. Sometimes an interval has to be left before the next one.
4. Send your dates and your flight home Because the change comes on gradually, HIFU is a treatment you notice after you are home. Knowing your schedule helps us decide what to do first on this trip.
Peche Clinic has both Ultherapy Prime and Shurink Universe, and is registered with the manufacturer of Ultherapy Prime as a certified provider. We are a one-minute walk from Exit 4 of Gangnam Station, on Subway Line 2 and the Shinbundang Line. We are open until 9 PM on weekdays and 6 PM on weekends and public holidays. Payment is by card on the day of treatment, and we give you an itemized receipt afterwards. Staff who speak English are on site, and inquiries and bookings come through WhatsApp. Our consultations draw on more than 90,000 treatments performed here.
FAQ
Q: Do different HIFU machines target different layers? A: No. Ultherapy Prime and Shurink Universe both aim at the SMAS and the dermis. The common explanation that each machine targets a different layer is not accurate. What actually differs is whether you can see inside the skin during treatment, whether there is a cartridge that reaches curved areas, and how long it lasts and how often you come back.
Q: Which HIFU machine is better, Ultherapy Prime or Shurink Universe? A: Neither is better — they are used in different places. Wide areas like the jawline and the neck suit Ultherapy Prime, which has a broad contact surface. Curved spots like under the eyes and around the mouth point to the round cartridge on Shurink Universe. We look at where you have sagged and decide together in the consultation.
Q: Can the doctor see inside the skin during HIFU? A: With Ultherapy Prime, yes — it has a built-in function that shows the layers under the skin as an ultrasound image. It is used while the treatment is running. It is not a device that measures your skin beforehand, and nothing is measured with it at the consultation stage to build a plan.
Q: When do HIFU results start to show? A: With both machines the contour starts changing from around week 4 and is clearest at 2 to 3 months. The change comes on gradually rather than right after the session, so you have it done in Seoul and notice it once you are home.
Q: Is one HIFU session enough? A: Many people notice a change after a single session. The duration and the repeat interval differ by machine, though, so if you are in Korea only once, the plan is to have one session now and add to it on a later trip. How much one session can do is worth settling in the consultation beforehand.
Q: Does HIFU in Seoul hurt? A: With Ultherapy Prime, numbing cream is applied and left to take effect before the session starts. With Shurink Universe, the 100-shot option is done without anesthetic, and numbing cream is used from 300 shots up. If your skin is sensitive, the numbing time can be extended beyond the standard, and the intensity and pace are adjusted when you say how it feels during the session.
Q: Can I fly home right after HIFU? A: With Ultherapy Prime we recommend flying from the day after treatment. It does not break the surface of the skin, so bruising and swelling tend to be minimal, though temporary redness and tenderness to the touch are possible. Send us your flight date and the treatments you want on WhatsApp and we will plan around your schedule.
Q: Can HIFU make my cheeks look hollow? A: Facial hollowing can show up in people with less facial fat, so on the cheeks the energy is adjusted to the condition of the skin. Which faces are more likely to show that change, and what is checked during the session, is covered in Ultherapy in Seoul: What Changes Your Risk of Hollow Cheeks.