I’m sensitive to pain, but it was manageable
I had 300 XERF pulses last week and I’m really pleased overall. 😊 I was nervous about pain beforehand because I’m quite sensitive, but it was better than I expected, and the treatment didn’t take long.
XERF in Apgujeong, Gangnam, SeoulDual-frequency monopolar RF skin tightening
XERF delivers two monopolar radiofrequencies simultaneously to treat the dermis and deeper supporting tissue. We use topical anesthesia. You can feel an initial tightening effect, and most patients return to their routine immediately.
Recognized XERF Heavy User Clinic
It's an option we often discuss for a first lifting treatment, and the prickling is generally manageable.
Dr. Chang-Hwan Cho Senior Vice President, Korean Aesthetic Surgery and Laser Society- Results
- Visible right away
- Duration
- Lasts around 6 months
- Comfort
- Tolerable stinging
- Recovery
- Minimal swelling
- Treatment time
- Around 20–30 minutes
- Treatment areas
- Cheeks, nasolabial area, jawline and neck
Remodeling develops over 3–6 months
Topical anesthesia; sharper sensations near the brow bone
Brief warmth; immediate return to daily activities
Excluding numbing time
Two frequencies.
Multiple layers.
A coordinated lift.
XERF uses dual-frequency monopolar RF technology, delivering energy to the dermis and deeper supporting tissues simultaneously. The two frequencies allow treatment across different layers in a single session.
Aging affects the skin, fat and supporting fascia, including the SMAS. XERF heats tissue at several levels to produce initial tightening followed by collagen remodeling over the months ahead.
#Dual-frequency RF#Three depth settings#Spider-pattern tip#Full-face planning
Firmer skin, softer folds and a more defined jawline
Sagging and firmness
Two radiofrequencies heat the dermis and deeper supporting layers together, firming loose skin.
Nasolabial folds and marionette lines
Heating tissue that supports the mouth area softens folds associated with sagging.
Jawline and contours
Energy reaching deeper tissue around the jaw sharpens definition along the lower face.
Cheek fullness
Collagen remodeling over several months improves skin density, so the cheeks look naturally fuller.
Neck lines and contours
The spider-pattern tip distributes energy evenly over the thin skin of the neck, improving lines and firmness.
Texture and pores
Dermal collagen renewal smooths texture, softens fine lines and reduces the appearance of pores.
Skin tightening planned by your doctor
Dong-An Joongsim Clinic, a recognized XERF Heavy User Clinic
Results depend on how treatment is planned and performed. We take time with every patient. A doctor handles your consultation and performs your treatment personally.
Extensive experience with RF lifting
Our clinic was recognized as a XERF Heavy User Clinic for its treatment experience. Your doctor draws on this regular, hands-on use of the device to plan each face individually.
A plan for the whole face
Dr. Chang-Hwan Cho attended the XERF users’ meeting, “Full Face Custom Design RF,” to study clinical approaches based on skin condition and facial structure.
Depth adjusted for each area
Your doctor selects Shallow, Middle or Deep settings by area to address texture, fullness and lifting within one plan.
Skin tightening results: patient experiences
4.8 / 5 on GoogleNaver reviews ↗Google reviews ↗
I could get straight back to my day
I had 300 XERF pulses. I was worried about the pain, but it was more manageable than I expected, and it didn’t take long. Afterward, I could get back to my normal day without swelling or discomfort. That was a big plus for me.
My facial outline looks neater
I had 300 XERF pulses, and my skin feels smoother and my facial outline looks neater. For someone having a lifting treatment for the first time, it seems like a manageable option.
The edges of my face feel a little tighter
I tried XERF because my facial outline had become less defined. I was worried it would feel hot, but for me, it mostly felt warm, with occasional stronger sensations. Afterward, the outer edges of my face felt slightly tighter, so I’m watching how the change develops.
2026-06-13 · XERF User MeetingXERF
XERF
Heavy User Clinic
Recognized for clinical experience gained from more than 30 XERF treatments per month.
- Dr. Chang-Hwan Cho Senior Vice President, Korean Aesthetic Surgery and Laser Society
- 2026-06-13Attendance at the XERF users’ meeting, “Full Face Custom Design RF”
Could RF skin tightening help your sagging skin?
Your doctor will assess whether it is right for you
- Your facial outline is less defined and your skin feels less firm
- Nasolabial folds and marionette lines concern you
- You want to improve the under-chin area and loose jawline skin
- You want to soften neck lines and improve neck definition
- You want a natural-looking lift without incisions
- Previous lifting results did not last as long as you hoped
How dual-frequency RF tightens sagging skin
Your doctor explains how it works
How do the two frequencies work together? Four steps take treatment from heating different layers to collagen remodeling.
Dual-frequency heating
One frequency targets the dermis while the other reaches deeper supporting tissue.
Cooling the surface
Wave Fit pulses and cooling help keep the skin surface at or below 45°C.
Even energy distribution
The spider-pattern tip distributes energy evenly to help reduce the risk of burns.
Collagen renewal
Collagen contracts initially, followed by remodeling over several months.
Our approach
Dr. Chang-Hwan Cho has lectured at international conferences in Bangkok, Jakarta and Hanoi on 6.78 MHz monopolar RF, one of the frequencies used in XERF.
ASLS Bangkok 2024, Jakarta 2024 and Hanoi 2025: “5 cm² 6.78 MHz Impedance-Matched Monopolar RF”
Skin tightening at Dong-An Joongsim Clinic
A plan for each treatment area
CheekbonesCheeksNasolabial foldsMouth areaJawlineUnder the chinNeckOther nonsurgical lifting treatments
Results, comfort and recovery at a glance
Compare skin tightening treatments side by side. The right choice varies from person to person, so your doctor will help you decide at your consultation.
| Treatment | Results | Duration | Comfort | Recovery |
|---|---|---|---|---|
| XERF | Visible right away | Lasts around 6 months | Tolerable stinging | Minimal swelling |
| Thermage | Gradual improvement | Lasts around 10 months | Brief bursts of heat | Redness and swelling for a few hours |
| EXION | Visible right away | Lasts around 6 months | Needle-like prickling | 1–3 days of redness or roughness |
| Sofwave | Gradual improvement | Lasts around 6 months | Heat and tingling | Redness for a few hours |
| Ultherapy | Gradual improvement | Lasts around 12 months | A deep ache near the bone | Swelling and soreness for 1–2 days |
Tighter contours before an important date
Treatment timed around your plans
From actors preparing for filming to patients planning a wedding or presentation, many people visit us ahead of an important date. Your doctor plans the timing and combination of treatments around your facial features and schedule.
If your event is tomorrow
With little downtime and an early tightening effect, this RF lift may be considered even the day before an event. We adjust areas and energy to minimize lingering redness or swelling.
If your event is a month away
We work backward from your event date to plan a course of treatment around XERF. Our broad range of devices lets us choose a combination that suits your face.
When tightening results appear and how long they last
- Immediately after treatment
An initial feeling of firmness
Collagen contraction gives the skin a tighter feel.
- After 1 month
Radiance and firmness develop
Skin renewal is well under way.
- After 3–6 months
Contours become more defined
Collagen remodeling brings the lifting effect toward its peak.
What to expect at Dong-An Joongsim Clinic
Your doctor oversees anesthesia and treatment
Your doctor handles both your consultation and treatment. A patient coordinator can help with pricing.
Doctor consultation
Your doctor assesses your skin and the areas of laxity.
Numbing cream
Topical anesthetic is applied to the treatment area.
RF treatment
Your doctor switches depth settings according to the plan for each area.
Soothing and hydration
Soothing and moisturizing care help settle warmth before you leave.
Preparation and aftercare for RF skin tightening
Aftercare
- You may wash your face and apply makeup the same day, but avoid vigorous massage.
- Swelling is usually minimal. Warmth or redness generally settles within 1–2 days.
- Avoid hot saunas, heat treatments and strenuous exercise for 1 week.
- Keep your skin hydrated and moisturized, and apply sunscreen diligently.
Sharing RF treatment experience at medical conferences
Conference lectures and seminars with doctors from around the world.
Treatments that can complement your skin tightening
Before treating sagging skin: insights from our doctors
Our doctors explain sagging, facial folds and jawline changes in clear, practical terms.
Which Lifting Treatment Suits Your Face?
Skin tightening devices work at different depths. The choice should reflect the layer where sagging begins.
The doctors at Dong-An Joongsim Clinic
ONDA and EMFACE: Two Different Approaches to Lifting (The Evolution of EBD VII)
ONDA and EMFACE take two different approaches to lifting. The column explains how ONDA's 2.45 GHz microwaves deliver more energy to fat than to skin.
Dr. Chang-Hwan Cho
Double Chin: Excess Fat or Sagging Tissue?
Treatment for a double chin depends on whether the main cause is fat beneath the chin or sagging skin and fascia.
The doctors at Dong-An Joongsim ClinicXERF: questions about side effects, results and duration
Answers from our doctors
How do I choose a XERF clinic in Apgujeong, Gangnam, Seoul?
Results depend on planning and technique. Check who conducts your consultation and procedure, whether authentic devices and supplies are used, and whether treatments can be combined to suit your face. Dong-An Joongsim Clinic is a recognized XERF Heavy User Clinic. A doctor handles both consultation and treatment, with time for your individual concerns.
How are Shallow, Middle and Deep settings used?
Shallow targets the dermis, Middle the more superficial fat beneath it, and Deep the deeper supporting tissues involved in sagging. Your doctor considers skin thickness, fat volume and your goals in each area. A deeper setting is not automatically better everywhere.
How does XERF differ from conventional RF?
It delivers 6.78 MHz and 2 MHz monopolar RF simultaneously, addressing the dermis and deeper supporting tissue. This differs from a single-frequency system. Its larger tip also allows greater energy delivery per pulse, as described in the clinic’s device material.
When will I see results?
Initial collagen contraction may give an immediate feeling of firmness. Radiance and elasticity develop around one month, with contour changes typically strongest over 3–6 months as remodeling continues. Before-and-after changes in the jawline and facial outline become clearer over time.
How long do results last?
Duration varies with your skin, age and treatment pulse count. Since collagen remodeling continues over 3–6 months, your doctor monitors the changes before recommending when to return.
Is XERF painful?
We use topical anesthesia. Prickling is generally manageable, though sharper sensations can occur around the brow bone and temples. Wave Fit pulses and cooling help reduce discomfort.
What side effects can occur? Can I return to my routine?
Bruising and swelling are generally minimal, so most patients return to their usual activities immediately. Warmth or redness usually settles within 1–2 days. The spider-pattern tip distributes energy evenly, with cooling to help keep the surface at or below 45°C. Avoid hot saunas, steam rooms and strenuous exercise for one week.
How does XERF differ from Thermage?
Both use monopolar RF. Thermage uses one frequency to heat the dermis while cooling the surface. XERF delivers 6.78 MHz and 2 MHz simultaneously to address the dermis and deeper supporting tissues, with Shallow, Middle and Deep settings.
What determines the cost?
Cost depends on the area, pulse count and anesthesia. Your doctor assesses your skin and facial structure, plans the depth and pulse count by area, and explains the cost during consultation.
What do patients mention in reviews?
Patients often say the discomfort was manageable even though they are sensitive to pain, and that they returned to daily activities with little swelling. Some report smoother texture and a more defined facial outline.
Our XERF equipment
| Manufacturer | Cynosure Lutronic |
|---|---|
| Energy | Dual-frequency monopolar RF6.78 MHz and 2 MHz delivered simultaneously |
| Depth settings | Shallow · Middle · Deep |
| Tips | Spider-pattern tipMore than twice the energy per pulse |
| Cooling | Wave Fit pulses + coolingSurface temperature at or below 45°C |
| Evidence | SCIE-indexed researchDeeper tissue preserved |
Firmer skin and a defined jawline, planned for your face by your doctor
We take time with every patient. Your doctor leads the consultation and performs the treatment, with a plan based on your facial features.
Sources
- Official XERF product page (Lutronic) ↗
- Medical On, August 21, 2025: Cynosure Lutronic XERF US FDA clearance ↗
- Weiss et al., Cureus 2026: dual-frequency monopolar RF for facial laxity (PubMed) ↗
- Ko et al., Lasers Med Sci 2025: histology of thermal responses to 6.78 MHz and 2 MHz monopolar RF (PubMed) ↗