First published: 2025-10-09 / Last reviewed: 2026-05-28
This is a guide to Thermage FLX, compiled by Dr. Choi Byeong-geun of SHINE U Clinic Konkuk (3 minutes walk from Konkuk Univ. Station, Exit 1).
As time passes, it is natural for skin to sag and fine lines to increase. For those who wish to firm up their skin from deep within without surgery, Thermage is a long-established non-surgical lifting procedure. Let's explore its principles, the progression of changes, and aftercare methods.
How Monopolar Radiofrequency Works
Thermage uses Monopolar Radiofrequency (RF) technology. The principle involves applying a tip to the skin surface and circulating energy through a grounding pad attached to another part of the body. Monopolar RF delivers deep and wide heat to the entire dermis and subcutaneous fat layer. This heat acts uniformly on the collagen tissue, firming up the skin from within like an internal support.
When heat is delivered, the stretched collagen fibers contract, allowing you to feel a tightening sensation immediately after the procedure. Over several months, this induces the production of new collagen and elastin.
Reasons for its Enduring Popularity
- A single treatment often maintains its effects for over a year, offering good time efficiency.
- Specialized tips for the eye area can delicately address eyelid sagging or fine lines around the eyes.
- It can also be applied to sagging body skin.
The cooling system built into the treatment tip protects the skin surface each time RF energy is delivered, helping to reduce surface damage and pain while delivering deep heat.
Changes Occurring in Two Stages
Immediately after the procedure, you will first experience the skin tightening and firming as collagen contracts. Subsequently, over 2 to 6 months, new collagen is generated, leading to a gradual improvement in facial contours.
Consultation to see if it suits your skin elasticity stage
Procedure Steps
Before the procedure, the facial contours and skin thickness are analyzed, and a grid pattern is designed on the treatment area to ensure thorough energy delivery. Due to the nature of the monopolar method, a grounding pad for RF circulation is attached to the back or abdomen. The tip is applied closely to deliver the predetermined energy, and during the process, a deep warmth and vibration may be felt. After the procedure, there might be slight redness or swelling, but these usually subside quickly.
Aftercare Tips to Support Results
- Since collagen is protein, it is advisable to consume plenty of protein-rich foods such as lean meat, beans, and eggs for several weeks after the procedure.
- From the next day, light aerobic exercises like walking can help improve blood circulation.
- Maintain skin hydration with hyaluronic acid serum or moisturizing cream.
If you are wondering if Thermage is suitable for your condition, please inquire via consultation chat. Suitability can be confirmed through a consultation with Dr. Choi Byeong-geun.
Authored by: Dr. Choi Byeong-geun (Chief Director of SHINE U Clinic Konkuk / Member of Korean Academy of Laser Dermatology and Hair, Korean Academy of Aesthetic and Plastic Surgery, Korean Academy of Filler, etc.) Last reviewed: 2026-05-28
This article provides general information about procedures and does not replace diagnosis or treatment. The suitability and results of the procedure may vary by individual.