XERF (Serf) vs Thermage FLX: How They Differ in Method, Recovery and Results
In short
Both are monopolar radiofrequency devices targeting dermal collagen. XERF is designed to reach different depths with multiple frequencies, while Thermage FLX is the long-established reference device. Skin thickness and pain sensitivity guide the choice.
Side-by-side
| XERF (Serf) | Thermage FLX | |
|---|---|---|
| Device / product | XERF monopolar radiofrequency | Thermage FLX |
| Main concerns | Loss of firmness, Fine lines, Facial contour | Skin laxity, Fine facial lines, Lines around the eyes |
| Treatment time | about 30–60 minutes | about 40–90 minutes depending on shots |
| Downtime | minimal (temporary redness) | minimal (temporary redness or swelling) |
| Results | immediate tightening, with gradual improvement over weeks to months | immediate tightening, with gradual improvement over 2–6 months |
| Repeat interval | reassessed every few months to a year depending on skin | usually reassessed around once a year |
Can they be combined?
They work differently, so when concerns overlap they are often scheduled together or in sequence. Discuss the plan with Dr. Lee Da-in.
Full guides: XERF (Serf) · Thermage FLX
Medical notice: every procedure can cause side effects such as swelling, bruising, redness, pain, inflammation or pigmentation, and results and their duration vary between individuals. Suitability and method are decided only after a consultation with the doctor. This page is general information, not a diagnosis. Fees follow the clinic's official non-covered fee schedule.
Frequently Asked Questions
Should I start with XERF (Serf) or Thermage FLX?
The main cause (muscle, volume, sagging, skin quality and so on) is assessed first to set the order.
Can I get XERF (Serf) and Thermage FLX on the same day?
Depending on the combination and areas it is sometimes possible; it is decided at consultation.
How does recovery compare between XERF (Serf) and Thermage FLX?
XERF (Serf): minimal (temporary redness). Thermage FLX: minimal (temporary redness or swelling).
Related Guides
- All Lifting treatments
- XERF (Serf): Overview
- XERF (Serf): Procedure & Time
- XERF (Serf): Recovery & Aftercare
- XERF (Serf): Who It's For
- XERF (Serf): FAQ
- XERF (Serf): Cost Factors
- XERF (Serf): In Seomyeon, Busan
- InMode guide
- Titanium Lifting guide
- Thermage FLX guide
- Medical reviewer: Dr. Lee Da-in
- Location, hours & parking
Not sure this is the right treatment?
Send Dr. Lee's team a photo and your travel dates. We'll suggest a plan and a consultation time.