Gangnam
Dr. Yoongon Ryu
Aesthetic Medicine Specialist
Flagship clinic · KOL for leading lifting & regenerative devices
Thermage FLX delivers monopolar radiofrequency to heat the deep dermis in a single session, building collagen over 2 to 6 months.
Thermage FLX is a non-invasive skin-tightening treatment that uses monopolar radiofrequency to heat the deep dermis while a cooling tip protects the surface. One session stimulates collagen that firms and smooths skin gradually over 2 to 6 months, with little to no downtime.
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Thermage FLX is a non-invasive radiofrequency (RF) treatment that tightens and smooths skin without surgery or injections. It uses monopolar RF energy to heat the deep dermis and the underlying fibrous network, prompting the body to contract existing collagen and produce new collagen over the following months. The FLX generation adds a larger treatment tip and AccuREP technology that calibrates energy in real time for more even, comfortable delivery.
Because the energy works below the surface while a built-in cooling burst protects the top layer of skin, most patients need only one session and return to normal activities the same day. Results appear progressively as collagen remodels, so Thermage FLX suits people who want firmer, more lifted-looking skin without the recovery of a facelift.
At Reberry Clinic, treatment is planned and reviewed by the clinic’s doctors, with English-language support for international patients across three Seoul-area locations (Gangnam, Myeongdong, Incheon Airport). A consultation confirms whether RF tightening fits your skin laxity and goals.
Thermage FLX uses monopolar radiofrequency, which sends a uniform field of RF energy into the dermis and subdermal tissue rather than relying on focused beams. The energy generates resistive heat that reaches therapeutic temperatures in the deep dermis, typically targeting around 65 to 75 degrees Celsius in the collagen-rich layers, which causes immediate collagen fibre contraction and triggers a wound-healing response that lays down new collagen over weeks to months.
The FLX tip vibrates and pulses cooling cryogen with each stamp, so the skin surface stays protected while heat builds underneath. AccuREP technology measures the skin’s response and adjusts each pulse, making the treatment faster and more comfortable than earlier Thermage systems. Unlike ultrasound-based lifting, RF heats a broad volume of tissue, which is why Thermage is often chosen for overall tightening and texture rather than only deep-layer lifting.
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A treatment grid is applied so RF stamps are placed evenly across the face or target zone, usually covering several hundred pulses in one session.
Each stamp pulses cooling cryogen onto the surface while RF heats the deep dermis to roughly 65 to 75 degrees Celsius.
The heat immediately tightens existing collagen fibres, giving some patients a subtle firming effect within the first 1 to 2 weeks.
Over the next 2 to 6 months the body produces fresh collagen, progressively firming and smoothing the skin.
Most patients complete treatment in a single 45 to 90 minute session, with maintenance often considered after about 12 months.
See representative outcomes from Reberry Clinic. Results build gradually and vary by individual; your plan is assessed at consultation.
The clinic’s doctors assess your skin laxity and texture, then choose the tip and number of pulses suited to your face, explained in English.
After a grid is applied, the session typically takes 45 to 90 minutes depending on the areas treated.
Most patients complete treatment in 1 visit and return to normal activities the same day.
Some firming appears within 1 to 2 weeks, with the main effect building over 2 to 6 months as collagen forms.
Effects often last around a year; sun protection and good skincare help maintain the firming you achieve.
Thermage FLX uses monopolar radiofrequency to heat the deep dermis to roughly 65 to 75 degrees Celsius while a cooling tip protects the surface. This contracts existing collagen and stimulates new collagen over months. You can see device details on our Thermage FLX page.
Adults with mild to moderate skin laxity who want firmer, smoother skin without surgery are the best candidates. It suits those who prefer no needles and minimal downtime. Very advanced sagging may respond better to other options; a consultation confirms whether RF tightening fits your goals.
Most patients feel brief heat with each pulse, balanced by a cooling burst that protects the skin. The FLX generation is more comfortable than older systems thanks to its vibrating tip and energy calibration. Any discomfort is temporary and ends as soon as the session finishes, with no lingering pain.
Downtime is minimal, and most patients resume normal activities the same day. Some experience mild redness, slight swelling, or temporary tenderness for a few hours. There are no needles or bandages, so international visitors can usually continue sightseeing shortly after the session in Seoul.
Some firming may appear within 1 to 2 weeks as collagen contracts, but the main result builds gradually over 2 to 6 months as new collagen forms. Results are progressive rather than immediate, so patience matters. Many patients notice the fullest effect around 6 months after a single session.
Most patients have a single, well-planned session, since one Thermage FLX treatment is designed to deliver a full collagen-stimulating dose. Some choose a maintenance session after about 12 months. Your doctor decides the right approach at consultation based on your skin and goals.
Results commonly last around 12 months, though this varies with age, skin quality, and lifestyle. Because Thermage stimulates your own collagen, natural ageing continues over time. Many patients schedule a maintenance treatment annually; a consistent skin care routine helps extend the firming you achieve.
Thermage FLX uses monopolar radiofrequency to heat a broad volume of dermis for overall tightening, while ultrasound devices focus energy into deeper layers for lifting. They address different needs and are sometimes combined. You can compare a focused-ultrasound option on our Ultherapy Prime page.
Yes, Thermage FLX is often paired with focused-ultrasound lifting, threads, or injectables for complementary effects, sequenced safely by your doctor. Some patients combine it with skin-quality care. A consultation determines the best order and spacing so each treatment supports the others without overlapping recovery.
Thermage FLX has a well-documented safety profile when performed by trained operators, with side effects usually limited to temporary redness, swelling, or tenderness. Rarely, brief bruising or surface sensitivity occurs. The built-in cooling helps protect the skin surface during heating, which supports the treatment’s strong safety record over many years of use.
Expect mild redness, slight swelling, and temporary tenderness for a few hours after treatment. Brief bruising or surface tingling is less common and self-resolving. Serious complications are rare when an experienced operator uses appropriate settings and surface cooling. Your doctor reviews your medical history beforehand to reduce any risk.
Aftercare is simple: protect treated skin from sun, keep it hydrated, and avoid intense heat such as saunas for a few days. There are no dressings or activity restrictions for most patients. The clinic provides written aftercare so you can follow it confidently once you travel home from Seoul.
Cost depends on the treatment tip used, the area treated, and the number of pulses planned for your skin, so price is confirmed at consultation rather than quoted as a fixed figure. Our English team explains what affects the cost and reviews the full plan before any treatment begins.
Thermage FLX favours overall tightening and texture through broad RF heating, while focused-ultrasound and other energy devices target deeper or more specific layers. The right choice depends on your skin. You can review a triple-wavelength laser alternative on our Titanium Lifting page.
A single Thermage FLX session needs only 2 to 3 days, covering consultation, treatment, and a brief review. Because downtime is minimal, you can pair it with a related option like Sofwave if advised. Our English team coordinates timing so the visit fits a short trip.
Yes, flying soon after Thermage FLX is generally fine, often the same day, because the treatment is non-invasive with minimal swelling. Stay hydrated during the flight and protect your skin from sun on arrival. If your treatment was extensive, your doctor will advise any specific timing before you travel.
International patients can have remote check-ins in English after returning home, with progress reviewed over the months results develop. If you want complementary care later, you can explore our skin care options. Your treatment plan and notes are kept on file for any future visit.
| Thermage FLX | Ultherapy Prime | Sofwave | |
|---|---|---|---|
| Energy / mechanism | Monopolar radiofrequency (RF), deep dermis | Micro-focused ultrasound (MFU-V), SMAS layer | SUPERB parallel-beam ultrasound, mid-dermis ~1.5 mm |
| Best for | Overall tightening, texture, and contour | Deep lifting of the jawline and neck | Fine lines and mid-dermal laxity |
| Pain / comfort | Heat pulses with cooling bursts | Brief deep warmth during pulses | Generally well tolerated warmth |
| Downtime | Minimal, possible mild redness | Minimal, possible mild redness or swelling | Minimal |
| Results timeline | Builds over 2 to 6 months | Builds over 2 to 3 months | Builds over weeks to months |
| Longevity | Around 12 months, varies | Around 12 months, varies | Several months, varies |
| Sessions | Usually 1 session | Usually 1 planned session | Often a short series |
| Cost factors | Depends on tip size and area; set at consultation | Depends on line count and area; set at consultation | Depends on area and protocol; set at consultation |
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