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How XERF Uses Two RF Frequencies to Tighten Skin

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If you are looking into lifting treatments in Seoul for the first time, the device names can blur together. XERF stands out for one reason: it uses two different radiofrequency (RF) frequencies in the same treatment, so heat can reach more than one layer of the skin. This page explains how that works, what a session feels like, how much downtime to expect, and how Dami Skin Clinic in Yeouido plans each treatment around your face.

Cross-section of skin showing the epidermis, dermis and subcutaneous layer. A handpiece on the surface sends two radiofrequency paths to different depths: one heats an area in the dermis and the other heats an area in the subcutaneous layer, and wavy lines in both heated areas show collagen renewal prompted by the heat.

What XERF does, in plain terms

XERF is an RF lifting device. Radiofrequency energy is a form of controlled heat. When that heat reaches the deeper layers of the skin, it prompts the body's natural repair response, which includes producing new collagen. Collagen is the protein that keeps skin firm and elastic, and it naturally declines with age.

XERF sends heat through the skin's layers, from the epidermis and dermis down to the subcutaneous tissue beneath. The aim is gradual collagen renewal and a firmer, tighter look over the following weeks, not an instant change.

Why two frequencies instead of one

XERF combines two different RF frequencies in one device. Using both lets the heat work on more than one layer during the same session, so the surface of the skin and its deeper supporting tissue are addressed together rather than one at a time.

This is the idea behind the dual-frequency approach: tightening that works from the outside in and from the inside out at the same time.

Who XERF tends to suit, and who should wait

XERF is most often considered for these concerns:

  • Fine lines
  • Skin that has lost elasticity
  • A jawline that has started to soften or sag

It is generally not recommended in these situations:

  • Pregnancy
  • Severe inflammation in the area to be treated
  • Metal implants in the treatment area

Your doctor will check your skin and medical history before recommending XERF, so mention any implants, skin conditions, or recent procedures during the consultation.

What a session feels like

A XERF session takes about 30 to 45 minutes. A numbing cream is applied beforehand to keep you comfortable. During treatment, most people describe the sensation as a warm feeling with a slight tingling or prickling. Most people find it comfortable, and you can tell the doctor at any point if the heat feels too strong.

Recovery: what you might notice afterward

There is little to no downtime, and most people go straight back to their normal day. Some people notice mild redness right after treatment, which usually fades within a few hours. This makes XERF easy to fit into a trip to Seoul, since you do not need to plan recovery days around it.

Sessions, timing and how long results last

Results build gradually as new collagen forms, so XERF is usually planned as a short series rather than a single visit.

QuestionWhat to expect
Recommended sessions3 sessions
Spacing between sessionsAbout 3 to 4 weeks
When results appearChanges begin after treatment and build over 1 to 3 months
How long results lastAround 6 months to a year or more, depending on the person
DowntimeLittle to none; mild redness may fade within hours

How long results last varies with age, skin condition and lifestyle, so your doctor may suggest a maintenance plan after the first series.

How Dami Skin Clinic designs each XERF treatment

No two faces sag in the same direction or at the same rate. Before treatment, the doctor at Dami Skin Clinic assesses your skin thickness and the direction in which your skin is sagging. That assessment is used to set the number of shots and the energy level for your face specifically, instead of applying the same settings to everyone.

Multilingual coordinator support is available for international patients, so you can ask questions about the plan, the numbing and the aftercare in a language you are comfortable with.

To plan your treatment, request a visit through the consultation page or message the clinic on WhatsApp.

Pairing XERF with a skin booster

XERF works on firmness and structure. Skin boosters work on hydration and skin quality. Because they do different jobs, they are often combined: pairing XERF with a skin booster such as Juvelook can support both moisture and elasticity at the same time. Whether a combination suits you is decided during your consultation.

If you are comparing boosters, see how Rejuran and Juvelook differ.

FAQ

Q. What is XERF lifting?+

A. XERF is a radiofrequency lifting treatment that uses two different RF frequencies to deliver heat to several layers of the skin. The heat prompts collagen renewal, which is meant to firm and tighten the skin gradually.

Q. Does XERF hurt?+

A. A numbing cream is applied first. Most people feel warmth and a light tingling during treatment, and it is generally described as comfortable.

Q. Is there any downtime?+

A. There is little to no downtime, and most people return to their normal routine the same day. Mild redness may appear and usually fades within a few hours.

Q. How many sessions do I need?+

A. Three sessions spaced about three to four weeks apart are usually recommended. Your doctor will confirm the plan after assessing your skin.

Q. How long do the results last?+

A. Results develop over one to three months and commonly last around six months to a year or more. The exact duration varies from person to person.

Q. Who should not get XERF?+

A. XERF is generally not recommended during pregnancy, when there is severe inflammation in the treatment area, or when there are metal implants in the treatment area. Tell your doctor about your medical history before treatment.

Q. Can XERF be combined with a skin booster?+

A. Yes, it is often paired with a skin booster such as Juvelook to support hydration alongside firmness. Your doctor will advise whether a combination suits your skin.

What Our Customers Say

4.9★★★★★119 reviews on Google
Andrea Rodriguez
★★★★★

I had a great experience at this clinic! I came in for a Pico Laser treatment and a treatment to remove my freckles, and I also got Botox in two areas of my face. They gave me a discount, which was a really nice bonus. Everyone was incredibly kind, professional, and welcoming. One of the things I appreciated the most is that everyone speaks English, including the doctors, so I was able to fully understand the consultation, the treatments, and the recommendations without any language barrier. I highly recommend this clinic, especially for foreigners who don’t speak Korean but still want to have a treatment where they can communicate comfortably and understand everything clearly. I felt very well taken care of throughout the whole experience. I would definitely come back! ❤️

a month ago
Jennis Neo
★★★★★

The staff via whatsapp was friendly and responsive to accommodate last min change request to my appointment. The place was clean and comfortable and the lady doctor was helpful to suggest what’s good for me based on my needs. I find the procedures reasonably priced as there were some promotional offers. I managed to get there by 5.30pm for a last consultation and finished my treatments by 7:30pm (clinic closes at 7pm) yet besides the lady doctor who performed the procedures, the lady assistant who helped to clean and prep my face and the male interpreter who stayed with her to explain in English to me step by step what she’s doing— were patient and thorough, I didn’t feel rushed at all. I feel very pampered. I’ll certainly come back again the next time I’m in Seoul!

4 months ago
이정훈
★★★★★

While getting ready for my wedding, I started looking into different skin treatments and ended up getting a skin booster injection along with Pico toning. My skin is naturally very thin and sensitive, so I was worried because it tends to react easily if a treatment doesn't suit me. But they carefully checked my skin condition first during the consultation, which made me feel a lot more comfortable. There was a little redness on the day of the treatment, but once I put on makeup the next day, it was barely noticeable. I was especially happy during my wedding photoshoot because my makeup went on so well My skin just looked healthy and fresh without needing heavy coverage!

5 months ago
Emily Herrera
★★★★★

Love this Clinic! My husband got lifting and his skin looks amazing now, plus they have some snaks and English translator for your consultation 🫶🏻.

11 months ago
Umman Lee
★★★★★

I recently visited Dami Clinic and had a really great experience! The staff were extremely kind and welcoming, which made me feel very comfortable from the beginning. The doctor was not only kind but also very professional, explaining everything clearly and carefully. I especially enjoyed my Sylfirm X treatment, which helps with redness and pores. The whole process was smooth. I would definitely recommend Dami Clinic to anyone looking for professional skin care with a warm and friendly atmosphere! 🌸

a year ago

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Monday/Wednesday/Thursday : 10:00 – 19:00
Tuesday/Friday : 10:00 – 21:00
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Lunch Break : 13:00 – 14:00
Last appointment is one hour before closing.

When using the subway
From Saetgang Station (Line 9 or Sillim Line)
Walk straight out of Exit 2 until you reach a corner. It is the building on the other side of the street on your left. Got to the black door on the left of the Mammoth Coffee place and go up to 9TH FLOOR.