Does InMode FX Really Work for Double Chin and Sagging Jawline? Who Is It Best For?
Here's how InMode FX targets skin laxity along the jawline and cheeks — including its limitations and how it compares to other procedures.
When the area under your chin starts to feel heavy and your cheek contour loses its definition, it can make your face look fuller — even if your weight hasn't changed much. This kind of change isn't always just about fat. In many cases, it's a combination of shifting fat volume and declining skin Elasticity pulling everything downward.
The short answer: InMode FX uses Radiofrequency (RF) energy to heat the Dermis and tighten skin that has lost its firmness, which makes it a solid option for a blurred jawline and mildly sagging cheeks caused by loss of Elasticity. That said, it isn't designed to significantly reduce accumulated fat — so it's important to set realistic expectations based on whether your concern is primarily about Elasticity or fat volume.
> This article is an informational content piece from Beautystone Clinic in Hongdae.
What you'll learn from this article
· Why Double Chin and sagging cheeks develop — explained structurally
· How InMode FX works to improve skin Elasticity
· The limitations of the procedure and how it compares to alternatives
· Who is a good candidate for InMode FX — and who might not beWhy Double Chin and Sagging Cheeks Develop
The shape of your jawline and cheeks is determined by subcutaneous fat* beneath the skin and the skin itself sitting on top. As we age or as weight fluctuates, the volume of that fat layer shifts — and at the same time, the skin loses its Elasticity, causing the jawline to blur and the cheeks to drift downward.
Subcutaneous fat*: The layer of fat that sits just beneath the skin. When its volume changes alongside a reduction in skin Elasticity above it, the result is a Double Chin or changes to the cheek contour.
That's why, even though two people may describe the same concern — a soft, heavy area under the chin — the underlying cause can differ significantly. When fat is the primary driver, the approach is different from when Elasticity loss is the main culprit. Devices like InMode FX address the Elasticity side of the equation. Research has shown that monopolar Radiofrequency (RF) energy heats the Dermis to stimulate Collagen production — a well-established mechanism for improving skin Elasticity, essentially encouraging the skin to rebuild its firmness from within.
How InMode FX Works
InMode FX delivers Radiofrequency (RF) energy into the skin, raising the temperature of the Dermis and underlying tissue to a controlled level. The heat causes existing Collagen fibers to contract — producing an immediate tightening effect — and then stimulates the gradual production of new Collagen over the following weeks, progressively improving skin firmness.
This makes InMode FX a well-suited option when the primary concern is loss of Elasticity — such as a softened jawline or mildly sagging cheeks. Rather than delivering dramatic overnight results, the improvement tends to develop gradually over several weeks, which is why most patients schedule multiple sessions to track and build on their progress. It's worth knowing upfront that this procedure is not designed to directly dissolve or significantly reduce fat deposits.
Limitations and How It Compares to Other Procedures
Procedures used for Double Chin and cheek concerns each target something different. The right choice depends on whether your primary issue is fat or Elasticity — here's a general breakdown to help frame the comparison.
| Category | InMode FX | Fat-dissolving injection | Thread lift |
|---|---|---|---|
| Primary target | Loose skin Elasticity | Localized fat volume | Repositioning sagging contours |
| Best suited for | Laxity-driven jawline & cheeks | Excess subcutaneous fat | Immediate contour definition |
| Results timeline | Gradual over several weeks | Progressive | Relatively faster |
| Downtime | Minimal | Associated Swelling | Possible Bruise & discomfort |
As the table illustrates, InMode FX excels when skin laxity is the central concern. If fat is the main issue, a different approach may be more appropriate. When both factors are present, procedures are often planned in combination.
Why Beautystone Clinic in Hongdae?
At Beautystone Clinic in Hongdae, Double Chin consultations always start by identifying whether the root cause is fat or declining Elasticity. Even when patients describe the same concern — a heaviness under the chin — the underlying picture can vary considerably between excess fat and skin laxity, so rather than recommending one procedure across the board, we take the time to determine what approach is actually right for each individual. As a small clinic conveniently located near Hapjeong Station, we're well-positioned to track how your Elasticity responds session by session and plan the next steps together.
Who Is a Good Candidate for InMode FX — and What to Keep in Mind
InMode FX tends to be a particularly good fit for the following:
- Those whose jawline has softened without significant weight gain — typically a sign that Elasticity loss is the primary driver
- Those looking for a noticeable yet natural-looking change without surgery or more intensive procedures
- Those who want to return to daily life quickly with minimal Downtime
- Those who are comfortable with gradual, incremental improvement over multiple sessions
On the other hand, if significant fat accumulation is the main concern, RF energy alone may produce only modest results. Mild redness or warmth immediately after the procedure typically resolves within a day, but if Swelling or Pain persists beyond that, please consult with your treating clinician. This article is intended as general information — whether InMode FX is right for you, and how many sessions you may need, should be determined in direct consultation with a qualified medical professional.
Frequently Asked Questions
Q. Can InMode FX reduce Double Chin fat?
A. InMode FX is primarily designed to tighten skin laxity rather than directly dissolve fat. If fat is the main cause of your Double Chin, results may feel modest — which is why identifying the root cause before proceeding is important.
Q. How many sessions does it take to see results?
A. Some tightening can be noticed after a single session, but more noticeable improvement is typically seen when sessions are spaced a few weeks apart and repeated over time. The recommended number of sessions varies depending on skin condition and is best determined during a consultation.
Q. Can I return to normal activities right after the procedure?
A. Downtime is generally minimal — most patients return to their regular routine the same day or the day after. That said, some mild redness or Swelling may linger, so if you have an important event coming up, it's a good idea to give yourself a few days of buffer.
Q. Can InMode FX be combined with fat-dissolving injections?
A. Yes, it's possible to address fat with a fat-dissolving approach while managing Elasticity with RF in a combined plan. However, whether both can be performed on the same day and in what order depends on your skin condition — this should be decided in consultation with your clinician.
