What Is XERF? A Guide to Korea’s Dual-Frequency RF Lifting
How XERF works, what it treats, who it suits and what to expect from treatment and results at a Gangnam skin clinic.
XERF is a non-surgical monopolar radiofrequency (RF) lifting device from Korea that combines two frequencies, 6.78 MHz and 2 MHz, to heat both superficial and deeper skin layers. The heat tightens existing collagen and triggers new collagen production, improving firmness, jawline definition and mild to moderate sagging. Results build gradually, typically peaking around 2–3 months and lasting about 6–12 months.
What XERF is
XERF is a dual-frequency monopolar RF lifting system. Instead of a single frequency, it combines 6.78 MHz for more superficial dermal tightening and 2 MHz for deeper tissue heating, with integrated cooling to protect the skin surface. It needs no incisions or general anesthesia.
How XERF works
With age, collagen and elastin decline, leading to loose skin, jawline sagging, fine lines and neck laxity. XERF delivers controlled heat beneath the skin, which has two effects:
- Immediate collagen contraction: existing fibers tighten, giving subtle lift.
- Collagen remodeling: over the following weeks to months, the healing response builds new collagen and elastin, improving firmness and texture.
Using two frequencies lets the doctor tailor energy to different facial areas and avoid concentrating too much heat in one layer.
Areas treated and good candidates
- Face: jawline, cheeks, mid- and lower face, nasolabial folds, marionette lines
- Under the chin: mild double chin from loose skin
- Neck: mild sagging and horizontal lines
XERF is best suited to mild to moderate laxity, early jowls and loss of elasticity, and is popular with patients in their 30s to 50s. It does not replace a surgical facelift for advanced sagging.
What happens during treatment
- Consultation: the doctor assesses skin thickness, anatomy, areas of laxity and goals.
- Planning: shot count and energy settings are customized — see how many shots you need.
- Procedure: RF energy is delivered with a handheld applicator while cooling keeps the surface comfortable; numbing cream is optional.
- Recovery: most people return to normal activities the same day; mild redness usually fades within hours.
Results timeline and longevity
- Immediately: subtle tightening
- 1–2 months: improved elasticity
- Around 2–3 months: main lifting and contour improvement, with gradual change sometimes continuing for several months
Results commonly last about 6–12 months depending on age, skin quality, sun exposure, smoking and lifestyle; maintenance helps prolong them. See how long XERF lasts.
XERF vs Thermage FLX at a glance
| Feature | XERF | Thermage FLX |
|---|---|---|
| Technology | Dual-frequency monopolar RF | Single-frequency monopolar RF |
| Frequency | 6.78 MHz + 2 MHz | 6.78 MHz |
| Comfort | Often described as more comfortable | Stronger heat sensation |
| Recovery | Minimal | Minimal |
| Strength | Multi-depth collagen stimulation | Long clinical track record |
Both are effective RF lifting options; the right choice depends on your skin. Read the full XERF vs Thermage comparison.
Reviewed by Dr. Joo Sohee
Representative director of Nest Clinic Gangnam, a doctor-led aesthetic clinic with a female medical team that treats local and international patients. This page is reviewed for medical accuracy; it is general information, not a diagnosis. Treatment plans are decided after an in-person consultation.
Clinic treatment counts as reported by Nest Clinic. About the clinic
Frequently asked questions
Is XERF painful?
Most patients describe warm pulses rather than sharp pain, helped by integrated cooling and even energy distribution. Numbing cream can be used for sensitive patients.
How many XERF shots do I need?
Common plans are 300, 600, 900 or 1,200 shots, chosen during consultation according to the area and degree of laxity.
Is there downtime after XERF?
Most people return to work the same day; mild redness usually resolves within a few hours.
Can XERF replace a facelift?
No. XERF improves mild to moderate laxity but does not achieve the degree of lift of surgery.
Can XERF be combined with other treatments?
Yes. It is often combined with skin boosters, collagen stimulators such as Juvelook, Botox or other lifting treatments, depending on your needs.
Related treatments
Considering XERF in Seoul?
Send us a photo and your goals — a doctor reviews it and our English-speaking coordinator replies with a personalised plan and price.
4F–5F Seocho Building, 453 Gangnam-daero, Seocho-gu, Seoul
1-min walk from Sinnonhyeon Station Exit 7 (Line 9)
7–10 min from Gangnam Station Exit 10/11
+82-10-4843-2867
