XERF vs Ultherapy vs Thermage: Which Works Best in San Diego?
For most patients with mild to moderate skin laxity, XERF skin tightening in San Diego offers the best balance of comfort, results and zero downtime among XERF, Ultherapy and Thermage. XERF uses two radiofrequency frequencies to treat several layers of skin in a single session, while Ultherapy and Thermage each work within a narrower range. At our Korean skin care clinic in San Diego, a physician led team matches each patient with the most suitable treatment.
Comparing XERF, Ultherapy and Thermage
XERF, Ultherapy and Thermage are three of the most widely discussed nonsurgical skin tightening treatments available today. All three firm the skin without incisions, which is why patients at our Korean skin care clinic in San Diego often ask how they differ.
Each treatment heats the deeper layers of the skin to contract existing collagen and stimulate new collagen production over the following months. The key differences are the type of energy used, the number of tissue layers treated at once and the level of comfort during the session. Real patient outcomes are available in our before and after gallery.
How Does XERF Work?
XERF is the newest of the three technologies and the centerpiece of the skin tightening program at Seoulé. It was developed by Cynosure Lutronic, a company with deep roots in Korean aesthetic medicine, and became widely used in Seoul clinics before receiving FDA clearance in the United States in August 2025.
XERF delivers monopolar radiofrequency at two frequencies, 6.78 MHz and 2 MHz. The higher frequency targets the more superficial support tissue, while the lower frequency reaches deeper structures. This allows a single pass to treat both the dermis and the deeper fibrous network that supports the face. Because laxity rarely affects only one layer, multilayer treatment produces a more balanced, natural result. Full device details are available on our XERF treatment page.
Patients typically describe the sensation as warm, similar to a hot stone massage. Integrated cryogen cooling protects the skin surface, so topical numbing is usually unnecessary, as explained during each XERF consultation. Key benefits include:
• No needles, incisions or downtime
• Immediate return to work, exercise and daily activities
• Visible tightening right after treatment, with continued improvement for three to six months
• Results that commonly last 12 to 18 months with annual maintenance
XERF is frequently combined with Sylfirm X RF microneedling for texture or skin boosters for hydration, as outlined later in this article.
How Does Ultherapy Work?
Ultherapy, manufactured by Merz Aesthetics, uses focused ultrasound rather than radiofrequency. Real time ultrasound imaging allows the provider to view tissue layers and deliver heat at set depths, including the SMAS layer that surgeons tighten during a facelift. Ultherapy is FDA cleared to lift the brow, the neck and the area under the chin. A comparison with our preferred technology is available on the XERF page.
Ultherapy has a long clinical track record and is well suited to targeted brow or chin lifting. The main limitation is comfort, as many patients find the treatment intense and clinics often use numbing or pain medication. Results develop gradually over two to six months, a timeline similar to most skin tightening before and after photos.
How Does Thermage Work?
Thermage FLX by Solta Medical has been used for more than twenty years. It delivers single frequency monopolar radiofrequency, usually in one session, with cooling and vibration for comfort. Thermage is effective for general tightening of the face, eyes and body. Because it uses a single frequency, it heats a more uniform depth than dual frequency XERF, with results developing over approximately six months.
Side by Side: XERF vs Ultherapy vs Thermage
The following comparison summarizes the main differences between the three treatments. Individual suitability is assessed during a consultation.
| Factor | XERF | Ultherapy | Thermage FLX |
|---|---|---|---|
| Energy | Dual frequency radiofrequency (6.78 MHz and 2 MHz) | Focused ultrasound with imaging | Single frequency radiofrequency (6.78 MHz) |
| Layers treated | Several depths in one session | Set depths, including SMAS | Mostly the dermis |
| Comfort | Warm, well tolerated, built in cooling | Often intense, numbing common | Moderate heat with cooling |
| Downtime | None | Minimal, some tenderness | None to minimal |
| Results timeline | Some immediately, peak at 3 to 6 months | Gradually over 2 to 6 months | Gradually over about 6 months |
| Longevity | 12 to 18 months | About a year or more | About 1 to 2 years |
| Best for | Mild to moderate laxity, comfort focused patients | Brow, neck or chin lifting | Broad tightening of face, eyes or body |
Choosing the Right Skin Tightening Treatment
XERF is generally recommended for patients seeking noticeable firming of the jawline, jowls, neck, cheeks or under eye area without needles or downtime. It is also well suited to patients who prefer a preventive, slow aging strategy, which is the foundation of our Korean skin care approach.
Ultherapy may be appropriate when the primary goal is a targeted brow or chin lift and the patient is comfortable with a more intense session. Thermage may suit patients seeking broad tightening over a larger area. Each option is reviewed objectively as part of our consultation process.
Patients with significant sagging or substantial loose neck skin may achieve better results with surgery, and our team provides that guidance clearly. For many patients, however, nonsurgical skin tightening can delay the need for surgical intervention by several years.
How Long Do Skin Tightening Results Last?
Skin tightening results are long lasting but not permanent, as natural aging continues. The collagen produced during treatment remains in the skin. XERF results typically last 12 to 18 months, Ultherapy approximately one year and Thermage one to two years. Many patients extend results with periodic Sylfirm X sessions to maintain skin quality.
Daily sunscreen, consistent hydration, quality sleep and an annual maintenance session all help preserve results. Adding skin boosters between tightening sessions further supports elasticity and radiance.
How Much Does Skin Tightening Cost in San Diego?
The cost of XERF, Ultherapy or Thermage depends on the treatment areas, the number of sessions and whether treatments are combined. A full face and neck treatment costs more than a single area such as the jawline or eyes. Every plan at Seoulé is customized, and a clear quote is provided after consultation with no hidden fees. CareCredit financing is available for qualifying patients, with details available through our contact page.
XERF Skin Tightening in San Diego, CA
San Diego's year round sunshine accelerates collagen breakdown. Beach days, hikes at Torrey Pines and outdoor dining all contribute to cumulative sun exposure, which often appears first as a softer jawline, fine lines around the eyes or crepey neck skin. XERF in San Diego is designed to address these early signs of laxity.
Our clinic is located in Kearny Mesa on Dagget Street, minutes from the Convoy District, and serves patients from La Jolla, Clairemont, Mission Valley, University City, Carmel Valley, Point Loma and North Park. Our guiding phrase reflects our mission: why go to Korea when you have Seoulé right here? Appointment details are available on our contact page.
Every XERF treatment plan is overseen by our Medical Director, Dr. Lydia Park, MD, and delivered by an expert team that includes Senior Injector Young Suh, RN. Physician led care has been central to our San Diego clinic since it opened.
What Happens During a XERF Appointment?
A XERF appointment follows a clear, structured process at our XERF treatment clinic:
1. Consultation. Clinic Director Esther Yoo reviews treatment goals, medical history and budget.
2. Preparation. The skin is cleansed and treatment areas are mapped. Numbing is usually not required.
3. Treatment. The XERF handpiece delivers radiofrequency energy with cooling bursts. A full face and neck session takes approximately 30 to 90 minutes.
4. Aftercare. Makeup can be applied immediately and normal activities resume the same day.
5. Progress review. Results are reviewed over the following weeks and maintenance is planned as needed.
Combining XERF With Korean Skin Treatments
Skin tightening improves structure, while Korean glass skin also requires smooth texture, even tone and deep hydration. For this reason, XERF is commonly combined with Sylfirm X for pores, texture and pigment, and with skin boosters for a luminous finish.
Botox and neurotoxin treatments can be added to soften expression lines on the forehead and around the eyes. For a comprehensive plan, our customized ultimate skin rejuvenation packages combine Sylfirm X, Multifrax and topical skin boosters.
Related guides include Korean skin tightening in San Diego, which compares XERF with Sylfirm X and skin boosters, and Korean hyperpigmentation treatment, which covers treatment for uneven tone.
Why Choose Seoulé for Skin Tightening in San Diego?
Seoulé was founded in 2022 as Nutricell Medical Spa, a physician led clinic, and became Seoulé K-Beauty Skin Lab in 2025. Our approach is built on three Korean principles: Bojon, meaning preservation, Gyunhyeong, meaning balance, and wellbeing. Treatments refine rather than replace, which is why XERF results at our clinic look natural.
Patients value our thorough consultations, transparent recommendations and calm clinical environment. Our top rated team and real outcomes are showcased in our patient gallery.
Book a XERF consultation at 7750 Dagget St, Suite 211, San Diego, CA 92111, or call 619.519.7776. Additional information about our services is available on our Korean skin care clinic homepage.
