Thermage FLX for Neck Linesin Gangnam, Seoul
Thermage FLX for the neck uses monopolar radiofrequency to tighten the skin of the neck and under-chin, where laxity and horizontal lines show with age. The heat firms the skin and stimulates collagen, while the vibrating tip and cooling spray protect the surface. At QD Clinic in Gangnam, Seoul, we map the neck with a treatment grid after assessing your skin; a session usually takes about 30–60 minutes with little downtime. (Results vary by individual.)
Who it’s for
- Horizontal neck lines and early neck laxity
- Under-chin softness beneath the jaw
- People who want to firm neck skin without surgery
- Those pairing neck care with a facial plan
Neck skin is thin and mobile, so the doctor tunes the energy carefully. Deep static bands may respond less and are discussed at consultation.
How it works
Monopolar radiofrequency heats the deep dermis along the neck and under-chin; the heat contracts existing collagen for an early firming effect and prompts gradual renewal over the following months, which may soften lines and laxity. The vibrating tip and cooling spray keep the thin neck skin comfortable, and AccuREP tunes the energy for even heating. Thermage is a radiofrequency technology cleared by the US FDA for the non-invasive treatment of wrinkles.
THE MECHANISM, STEP BY STEP
01Radiofrequency heats the deep dermis
Monopolar radiofrequency heats a broad volume of the deep dermis, rather than focusing energy to separate points — a different way of delivering heat than ultrasound.
02An early effect, then renewal
The heat contracts existing collagen for an immediate firming effect, and prompts gradual collagen renewal over the following months.
03Cooling and vibration on thin skin
The FLX handpiece pairs each pulse with a cooling spray and a vibrating tip, protecting the thin, mobile neck skin and easing the sensation of heat.
04Energy tuned per pulse
AccuREP technology reads and adjusts the energy for each pulse, helping the heating stay even across the treatment area.
Treatment areas
- Horizontal neck lines
- The lines that ring the neck.
- Under-chin (submental)
- Firmness beneath the jaw and chin.
- Jaw-to-neck edge
- Where the jaw blends into the neck.
What the procedure is like
- 1Consultation and assessment of the neck and under-chin
- 2Cleansing and grid mapping along the neck
- 3Radiofrequency delivery with cooling and vibration
- 4Soothing and aftercare guidance
Time: A neck session takes about 30–60 minutes.
Recovery & aftercare
- Little to no downtime; most people return to daily activities the same day.
- Temporary redness, mild swelling or warmth along the neck may occur.
- Use sun protection on the neck and follow the aftercare guidance we provide.
What to expect over time
A general guide to how the days and months after treatment usually unfold. Results vary by individual.
DAY 0 Treatment day
Brief heat with each pulse along the neck, eased by cooling and vibration; some people feel an immediate tightening. Afterwards mild redness or warmth that usually settles within hours. Most people return to daily activities the same day.
DAY 1-3 Settling
Any redness, mild swelling or warmth along the neck generally eases. Makeup and normal skincare can usually resume as advised.
WEEK 2-8 Early firming
Early firming of the neck and under-chin may be noticeable. This varies from person to person.
2-6 MONTHS Collagen renewal
As collagen renews, a gradual tightening along the neck becomes more noticeable for many people, and lines may look softer. This is typically when results are assessed. (Results vary by individual.)
~6 MONTHS Review & maintenance
Thermage is often repeated per cycle; your doctor reviews the outcome and discusses timing for a further session based on your neck skin.
Sessions & results
A single session per cycle is common, with changes appearing gradually over about 2–6 months as collagen renews along the neck. A maintenance plan is discussed at consultation. (Results vary by individual.)
How it compares
These are all non-invasive, energy-based lifting treatments — but they use different energy and reach different depths, so they suit different goals.
| Comparison | Thermage FLX | Ultherapy PRIME | Sofwave |
|---|---|---|---|
| Energy | Monopolar radiofrequency | Focused ultrasound (imaging-guided) | Ultrasound (SUMS) |
| Main depth | Broad heating of the dermis | Up to ~4.5 mm — reaches the SMAS | Mid-dermis (~1.5 mm) |
| Often chosen for | Tightening neck skin and texture | Deeper under-chin and neck lift | Fine neck lines and early laxity |
| Sensation | Warm heating cycles with cooling | Brief warmth at each point | Warmth with integrated cooling |
| Downtime | Little to none | Little to none | Little to none |
Neither is “better” — they work differently and suit different goals. The right choice is decided after we assess your skin.
Safety & considerations
Possible reactions
- Temporary redness, a warm feeling, or mild swelling along the neck
- Tenderness in treated areas for a short time
- Occasionally small areas of bruising
- Rarely, temporary changes in skin sensation, or surface marks, that typically settle
When to take extra care
- Pregnancy or breastfeeding — let us know at consultation
- A pacemaker or other implanted electronic or electrical device — important for radiofrequency, tell your doctor
- Active skin infection, inflammation or open lesions on the neck
- Metal implants in the area, or recent fillers or threads on the neck — tell your doctor so timing can be planned
- A history of keloid or difficulty with wound healing
Neck skin is thin and mobile; radiofrequency tightens the dermis but deep static bands may respond less. Whether it is right for you is confirmed during consultation. Effects and downtime vary by individual, and side effects may occur.
Your care at QD Clinic
Performed by a board-certified doctor
Your treatment is performed and medically reviewed by a board-certified doctor, not delegated unsupervised.
FLX system with comfort features
We use the Thermage FLX handpiece — vibrating tip, cooling spray and AccuREP energy tuning — for more even and comfortable heating of thin neck skin.
Care in your language
Consultation in English, with 中文 and 日本語 support arranged on request — including questions before you travel.
A short walk from Gangnam Station
Central Seoul location with guidance from the airport and nearby hotels, and hours shown in KST.
Pricing
Pricing depends on the neck and under-chin zones treated. Please consult us for a personalized quote.
Frequently asked questions
It tightens the skin along the neck and may soften the appearance of lines and laxity over time; deep static creases can respond less. What is realistic is explained at consultation. (Results vary by individual.)
Yes. Many people pair the neck and under-chin with a facial plan for a more even result. The combined grid is decided at consultation.
Most people feel brief heat with each pulse, eased by cooling and vibration; thin neck skin can feel more sensitive. Comfort options are discussed at consultation. (Results vary by individual.)
Some firming can be felt early, with changes continuing over about 2–6 months as collagen renews. (Results vary by individual.)
Little to none. Temporary redness or mild swelling may occur and usually settles quickly.
Yes. Our doctors consult in English directly, and 中文 / 日本語 can be arranged in advance. Tell us your language on WhatsApp before your visit.
Often considered together
Treatments that are sometimes planned alongside this one, decided at consultation.
+QD Full Face Thermage FLX
Many people pair the neck with a full-face plan so the jaw and neck are tightened together for a more even result — decided at consultation.
+Neck Line Ultherapy PRIME
If deeper laxity is the concern, focused ultrasound reaches deeper than radiofrequency along the neck — considered instead of or alongside it.
+Neck Sofwave
Mid-dermis ultrasound firms fine neck lines and can complement radiofrequency — sequencing decided by your doctor.
For international patients
Consultation in English / 中文 / 日本語 · WhatsApp · WeChat · KakaoTalk · a 4-minute walk from Sinnonhyeon / Nonhyeon Station (hours in KST) · card payment.
For International PatientsMedically reviewed by Dr. Sahyeok Hong, board-certified plastic surgeon and Director of QD Clinic.