1:1 Consultation
XERF
Learn how RF energy creates controlled heat in the dermis and deeper tissue layers to support skin tightening and rejuvenation. Learn more.
Mason Clinic · 1:1 Director-Performed Procedure
1:1 Consultation →
What is XERF skin tightening in lifting & tightening dermatology?
XERF is a non-invasive medical device developed by Lutronic, now part of Cynosure Lutronic. It is described by the manufacturer as the first multifrequency monopolar radiofrequency platform, delivering energy at 6.78 MHz and 2 MHz with three selectable depth settings and ten adjustable intensity levels.
When RF energy passes through skin tissue, resistance generates controlled heat within the dermis and deeper soft-tissue layers. This produces two stages of response. The first is an immediate effect, where existing collagen fibers contract and shorten, which may create an early sensation or appearance of firmness. The second is a progressive effect, where the thermal response activates fibroblasts and extracellular-matrix remodeling over the following weeks, potentially supporting new collagen and elastin formation.
XERF combines a lower 2 MHz frequency, intended for deeper energy deposition, with the more commonly used 6.78 MHz frequency, which targets the dermis and intermediate soft-tissue structures. In deep-treatment mode, the two frequencies are combined to affect tissue at different depths. The device also uses Wave Fit pulse technology and an impedance feedback system intended to help adapt energy delivery to each patient's tissue resistance, along with integrated cryogen-based cooling to protect the skin surface during treatment.
It is important to understand what XERF is not. It is not a surgical facelift, a thread-lift procedure, a dermal filler, or a treatment that restores lost facial volume. Patients with advanced jowling or significant skin redundancy may see only limited improvement and may benefit more from a surgical consultation.
Who may consider XERF treatment?
XERF may be worth discussing with a physician for adults who notice:
Mild-to-moderate facial skin laxity, particularly along the lower face and jawline
Early jowling or reduced jawline definition
Reduced skin firmness without significant sagging
Fine lines associated with diminished elasticity
Mild laxity in the cheeks, midface, or submental area
Uneven or weakened-looking skin texture
A preference for a non-surgical, needle-free treatment option
Realistic expectations about gradual, subtle improvement rather than dramatic lifting
A consultation is necessary to determine whether visible concerns are caused mainly by loose skin, volume loss, bone structure, muscle bulk, or fat distribution, since XERF is intended to address soft-tissue laxity rather than these other underlying causes.
Meet the specialist
Dr. Kim Hyun-ju
Dermatology Specialist, M.D.
Dr. Kim Hyun-ju, Dermatology Specialist, M.D., is a Magna Cum Laude graduate of the Graduate School of Medicine at Kyung Hee University and a designated Alltite Key Doctor. She has served in director-level roles at Plus Hoo Clinic, Girin Plastic Surgery Clinic, and D.A. Plastic Surgery Clinic, building clinical experience across a wide range of skin quality concerns and patient profiles.
Dr. Kim's understanding of skin biology and cellular regeneration informs the assessment and treatment-planning process for patients considering energy-based procedures such as XERF alongside the clinic's broader skin quality programs. She personally conducts pre-treatment skin assessments and is available for direct consultation to patients who wish to discuss their individual treatment plan.
Mason Clinic's approach reflects Dr. Kim's broader care philosophy: that meaningful, lasting improvement in skin quality depends on a thorough, individualized understanding of each patient's skin biology rather than a standardized, one-size-fits-all protocol.
Treatment areas and expected improvements
Jawline and lower face
Reduced jawline definition and early jowling are among the more commonly discussed concerns for XERF. The treatment may support gradual firming of lower-face tissue as collagen remodeling progresses over the weeks following treatment. Improvement is generally described as subtle rather than dramatic, and results vary depending on baseline skin laxity.
Cheeks and midface
Cheek and midface laxity may be addressed using XERF's adjustable depth settings, which allow the practitioner to select shallow, middle, or deep treatment modes according to tissue thickness. Progressive firmness and improved texture are the primary expected changes.
Forehead and periorbital area
XERF may be considered for early laxity in the eyebrow and periorbital region when suitable smaller applicators are available. Published data specific to this area remain limited, consisting mainly of technical reports rather than large controlled studies, so expectations should be conservative.
Submental and neck area
Some protocols include the submental region, though published research on neck-specific outcomes is still developing. This should be discussed directly with your physician regarding suitability.
Across all areas, improvement is gradual, varies between individuals, and is not guaranteed to reach a specific degree of tightening. XERF does not reposition tissue in the way surgical procedures do.
Treatment process and timeline
Consultation — The physician reviews skin laxity, facial anatomy, fat distribution, prior surgeries, fillers, threads, implants, and any previous energy-based treatments, along with relevant medical history and treatment goals.
Skin preparation — Makeup and skincare products are removed, a conductive gel may be applied, and a return pad is placed on the body to complete the RF circuit safely.
Treatment mapping — The practitioner identifies target areas and selects the appropriate applicator, depth mode, and energy intensity based on individual anatomy.
RF delivery — The applicator is placed in full contact with the skin, and RF pulses are delivered along with cooling to protect the skin surface. The manufacturer markets XERF as usually not requiring topical anesthesia, though this does not mean the treatment is entirely painless — one multicenter study reported a mean pain score of approximately 4.2 out of 10 without anesthesia.
Post-treatment assessment — The treated skin is checked for excessive redness, swelling, or signs of thermal irritation before the patient leaves.
Follow-up timeline — Some early firmness may be noticeable soon after treatment due to immediate collagen contraction, but more meaningful change develops gradually. Clinical studies have assessed outcomes at intervals such as four weeks, twelve weeks, and up to ninety days after the final session, so this is a reasonable window for evaluating progressive results. Session numbers vary by protocol — some studies used a single session followed for twelve weeks, others used two sessions spaced about four weeks apart — and your physician will recommend a plan based on your skin condition.
Results, safety, and longevity
Two published human studies provide relevant reference points. A 2025 study of 20 Korean women reported a mean investigator-rated improvement score of 2.75 out of 4 and average patient satisfaction of approximately 7.84 out of 10 at twelve weeks, with no unexpected adverse events. A 2026 prospective multicenter study of 39 participants reported clinician-rated improvement in roughly 85% of cases at 30 days and over 92% at 90 days, alongside patient satisfaction rates rising from about 80% to 85% over the same period. Both studies were relatively small, lacked untreated control groups, and had limited follow-up duration, so they should be viewed as encouraging rather than definitive.
Commonly reported temporary effects include redness, mild swelling, warmth, tenderness, tingling, and temporary tightness or sensitivity, most of which resolve shortly after treatment. Because XERF delivers thermal energy, it is not risk-free — potential though uncommon complications include prolonged redness or swelling, blistering, burns, post-inflammatory pigmentation, temporary numbness, contour irregularity, or a burn beneath the return pad. Long-term duration of results has not been firmly established through controlled long-term trials; clinics should avoid promising a specific number of months, and results are understood to vary based on age, skin condition, treatment intensity, and individual biological response.
Patients should also be aware that, as of July 2, 2026, the FDA lists an open Class II recall involving specific XERF EFFECTOR 60 disposable tip lots manufactured between April and August 2025. This affects identified lots only, not every XERF device, and reputable clinics confirm their consumables are unaffected before treatment.
XERF received Korean Ministry of Food and Drug Safety authorization in January 2024 and FDA Class II 510(k) clearance in August 2025; its U.S. clearance is specifically for electrocoagulation and hemostasis in dermatologic and general surgical procedures, with skin-tightening effects described by the manufacturer as resulting from soft-tissue coagulation. Accordingly, it is more accurate to describe the device as FDA-cleared rather than approved specifically for cosmetic facial lifting.
Why choose Mason Clinic for XERF treatment?
Mason Clinic approaches skin tightening as part of an individualized skin quality program rather than a standardized package. Every patient's treatment plan begins with a thorough skin assessment led by Dr. Kim Hyun-ju, whose academic background and multi-clinic clinical experience inform decisions about applicator selection, depth settings, and treatment intensity for each individual's anatomy and skin condition.
The clinic's philosophy centers on evidence-based, personalized care — recognizing that meaningful improvement in skin firmness depends on understanding each patient's underlying skin biology rather than applying a one-size-fits-all protocol. This same principle guides how energy-based treatments like XERF are integrated into a patient's broader skin health plan.
Patients considering treatment in South Korea also benefit from Mason Clinic's structured consultation process, which includes a full review of medical history, prior aesthetic treatments, and realistic goal-setting before any procedure is scheduled.
Key differentiators include:
Director-level physician assessment before every treatment plan
Individualized depth and intensity settings rather than fixed packages
Transparent discussion of realistic timelines and expected variability
Integration with the clinic's broader dermatology and skin booster programs when appropriate
Patient experiences
Patient 1 Early jawline laxity
A patient in her mid-forties noticed gradually softening jawline definition without significant sagging. After assessment, a middle-depth XERF protocol was selected, with gradual firmness noted over the following weeks.
Patient 2 Cheek and midface concerns
A patient in her fifties sought a non-surgical option for mild cheek laxity and textural changes. Her treatment plan combined XERF with a broader skin quality assessment, and she was advised that results would develop gradually over several weeks.
Combination skin quality goals. A younger patient interested in preventative skin firmness discussed both textural concerns and mild early laxity during consultation. Her physician explained that XERF's collagen-remodeling effects are gradual and individualized. Suggested image: a consultation-setting illustration showing physician and patient reviewing a treatment plan.
Final call to action
Ready to explore whether XERF is right for your skin?
If you're noticing early signs of facial laxity, reduced firmness, or a less defined jawline, a personal consultation with Dr. Kim Hyun-ju at Mason Clinic can help you understand whether XERF's dual-frequency radiofrequency technology fits your skin condition and goals. During your visit, your skin will be individually assessed, your medical history reviewed, and a tailored treatment plan discussed — including realistic expectations about timeline, gradual results, and any relevant risks — so you can make an informed decision about your care.
Contact Mason Clinic today to schedule your consultation, or reach out through our international patient coordination team for guidance on planning your visit.
Clinical Safety Notice & Personalized Consultation
All treatments at our clinic are performed after a 1:1 medical consultation with our attending physicians. Individual outcomes vary depending on skin anatomy and condition. Possible post-procedure effects include temporary redness, swelling, bruising, tenderness, or infection.
Request a 1:1 Consultation