If you've spent any time on TikTok or Instagram recently, you've probably seen XERF (pronounced "Zerf") making the rounds as the next big thing in non-surgical skin tightening. Clinics across the country are promoting it, influencers are posting their sessions, and patients are showing up to consultations asking one very reasonable question: is XERF better than Thermage?
Dr. Karyn Grossman, MD, has a direct answer: no.
Here's the full breakdown, from a board-certified cosmetic dermatologist who has spent over 25 years treating patients with radiofrequency technology.
How Both Devices Actually Work
To understand the comparison, you first need to understand the science. Both Thermage and XERF are radiofrequency devices, which means they deliver controlled heat energy deep into the dermis to trigger collagen remodeling and skin tightening.
Radiofrequency, when passed through the cooled epidermis, generates thermal energy in the dermis and deep dermal collagen. The remodeling that follows produces clinically discernible improvement in sagging skin and skin quality. That process is the same regardless of which device delivers the energy. Orangecountyplasticsurgery
So when patients ask Dr. Grossman how XERF compares to Thermage at the tissue level, her answer is clear:
"Under a microscope, Thermage and XERF do the exact same thing deep within the tissue to stimulate collagen and tighten the skin."
The devices share a mechanism. What separates them is everything else.
The Key Differences Between Thermage and XERF
Number of Treatments Required
This is the most important practical distinction. Thermage achieves its full collagen remodeling effect in a single session. XERF typically requires three separate treatments to reach a comparable outcome.
For a busy patient, that difference is significant. Three appointments mean three rounds of scheduling, three recovery windows, and three separate costs. Thermage consolidates all of that into one visit.
Energy Delivery and Depth
Thermage uses monopolar radiofrequency, which delivers uniform heat to the dermis at a controlled depth, stimulating collagen throughout the treated zone. This deep, consistent thermal energy enables it to achieve meaningful results in a single pass.
XERF delivers its energy across multiple sessions precisely because it cannot match Thermage's per-session output in a single treatment.
Clinical Track Record
Thermage has been in use for over two decades and is backed by a substantial body of peer-reviewed research. Clinical studies have demonstrated measurable improvements, including increased collagen density, improved skin laxity, and histologically confirmed collagen remodeling at 4 months post-treatment. XERF is newer and does not carry the same depth of long-term clinical data.
"But I've Seen Great XERF Results Online..."
Social media content is not clinical evidence. The reality is that both Thermage and XERF can produce visible improvement in skin laxity. The question is efficiency, consistency, and provider expertise.
A single well-delivered Thermage treatment by an experienced injector like Dr. Grossman will outperform three XERF sessions at a clinic where the device is operated by an aesthetician with minimal training. The technology matters, but the hands behind it matter just as much.
What About Comfort?
One question patients reasonably ask: if Thermage delivers more energy per session, does it hurt more?
Dr. Grossman addresses this directly: "While our patients might find Thermage a bit 'spicy' in comparison, our advanced pain-control methods ensure you remain completely comfortable throughout your visit."
Most patients find radiofrequency treatments to be comfortable experiences, with warmth and tingling sensations being the most commonly reported feelings during treatment, and modern devices incorporate real-time temperature monitoring and cooling features to maintain comfort throughout the session. At Grossman Dermatology, comfort protocol is personalized to each patient, so the higher energy output of Thermage is not a barrier to a smooth experience.
Ready to Find Out If Thermage Is Right for You?
Dr. Karyn Grossman, MD, has been performing Thermage treatments at Grossman Dermatology in Santa Monica for over two decades, with locations also in New York City. If you've been curious about skin tightening and want an honest, experienced perspective on what will actually work for your anatomy and goals, schedule a consultation today.
