How Many InMode FX Sessions Do You Need?
InMode FX for the jawline and double chin isn’t a one-and-done treatment — it’s a series, and each session builds on the last. Here’s how the change actually unfolds from session one through the rest of your plan.
“Do I need just one InMode FX session, or a whole series to actually see my jawline change?” It’s one of the most common questions people ask before their first appointment — especially once a double chin is part of the picture, since it’s not always obvious whether that’s fat, loose skin, or both.
The short answer? InMode FX is built around a series, not a single visit. Most people feel a bit of firmness after session one, and the jawline keeps sharpening as sessions add up — think cumulative, not one-and-done. Because it works on the fat layer and the skin’s collagen at the same time, change tends to show up in stages rather than all at once.
Fat volume and skin laxity aren’t the same from face to face, which is exactly why the number of sessions — and how soon you notice a difference — isn’t identical for everyone either. In this article, we’ll cover how InMode FX works on the jawline and chin, what typically changes from session to session, who tends to get the best results, and what actually happens during a visit. Read on.
What Is InMode FX?
InMode FX is a radiofrequency (RF) treatment that pairs bipolar RF energy with a suction, or vacuum-assisted, handpiece. That combination sets it apart from RF devices that only heat the surface: the suction draws tissue up toward the electrodes, which lets the energy reach both the dermis and the fat layer underneath it in the same pass.
Dermis*: the deeper, structural layer of skin beneath the surface, where collagen and elastic fibers live. It’s the layer that has to rebuild for skin to look firmer.
For the jawline and under the chin specifically, that dual reach matters. A double chin is rarely just fat or just loose skin — usually it’s some mix of both — so a treatment that only addresses one side of that equation tends to leave people underwhelmed.
How Does InMode FX Work on the Jawline and Chin?
Here’s what’s actually happening under the skin. RF energy heats the dermis enough to trigger a collagen response, which is what gives skin more tone and bounce over time. At the same time, that heat reaches into the subcutaneous fat layer just beneath the skin, which is thought to play a role in the gradual change in fullness under the jaw.
One clinical report on radiofrequency-based devices found that RF energy delivered to the dermis and the fat layer beneath it is associated with both collagen remodeling and changes in subcutaneous fat volume — and that improvement tends to appear in stages as tissue responds, rather than showing up all at once. That’s a big part of why judging InMode FX off a single session doesn’t tell the full story.
Because two different tissues are responding on two different timelines — collagen remodeling plays out over months, and fat layer change happens gradually too — the visible result builds across your session plan instead of maxing out after one appointment.
What Changes With Each Session?
Every face is different, but there’s a general pattern to how change unfolds across a series. Here’s a rough breakdown of what people typically notice at each stage:
| Session | What’s Happening | What You’ll Likely Notice | Note |
|---|---|---|---|
| Session 1 | Initial collagen response begins | Subtle firmness, not a visible jawline change yet | Too early to judge results |
| Sessions 2–3 | Collagen and fat layer response add up | Jawline starts to look more defined | This is usually where change becomes noticeable |
| Session 4+ | Change stabilizes | Chin fullness feels reduced | Maintenance sessions are optional |
As the table suggests, most people start noticing a real difference somewhere in the middle of their session plan rather than right after the first visit. Skin thickness, how much fat sits under the chin, and your starting level of laxity all affect how fast that shows up — so treat the table as a general pattern rather than a promise.
Who’s a Good Candidate for a Multi-Session Plan?
InMode FX tends to be the best fit for people who want a more defined jawline and chin without surgery, and who are comfortable committing to more than one visit. It’s especially well suited to a double chin that comes with some skin laxity, rather than fat volume alone.
- Your jawline looks blurred rather than sharply defined: InMode FX addresses tone and fullness together.
- Your double chin seems tied to loose skin, not just fat: the dermis-plus-fat approach covers both.
- You’d rather avoid surgery: the series format spreads change out gradually instead of one dramatic step.
- You can commit to a session plan: since results build cumulatively, consistency matters more than any single visit.
If fat volume under the chin is significant or skin laxity is more advanced, InMode FX on its own may not get you all the way there, and your provider might suggest pairing it with another treatment. Since every face carries a different mix of fat and laxity, that call is one to make in person rather than guess at from a table.
What Happens During a Session?
A typical visit starts with a quick look at your jawline and chin so your provider can gauge fat volume and skin laxity before treatment. From there, the RF-and-suction handpiece passes over the jaw and under the chin, and a single session usually doesn’t take long.
- Consultation: your provider checks fat volume and skin laxity before deciding on settings.
- Session planning: the number of sessions and the spacing between them gets mapped out based on your goals.
- Treatment: RF energy and suction are applied along the jawline and under the chin.
- Aftercare guidance: you’ll get a rundown of what to expect right after treatment and when your next session should be.
Mild warmth or a tingling sensation during the session is normal, and some redness afterward is common too. This is general information, not medical advice — your actual session plan should come from a provider who’s examined your jawline and chin in person.
Side Effects and Risks
Redness and mild swelling around the jawline are common in the first day or two after a session, and they typically settle on their own. Some people also notice a warm, slightly tender feeling in the treated area, which usually fades within a day or so.
If redness or swelling seems to be getting worse instead of better, or you notice spreading warmth, fever, or unusual pain, contact your provider or seek medical care right away rather than waiting it out.
Individual results vary, and how your skin and fat layer respond depends on your starting point, your provider’s technique, and how closely you stick to your session plan. Sun protection and basic skin care between sessions can help results settle in more evenly.
How Much Does It Cost?
Pricing for a multi-session InMode FX plan varies by clinic, how many sessions your provider recommends, and whether it’s bundled with another treatment. Because a series is the norm rather than a single visit, it’s worth asking about per-session pricing as well as any package rate before you commit.
Rather than guess at a number that may not apply to your face, a consultation is the more reliable way to get an actual quote — see current offers at /en/promotion.
The Bottom Line
InMode FX on the jawline and double chin is a cumulative treatment: a bit of firmness after session one, more definition through the middle sessions, and a settled, stabilized look by the later sessions in your plan. Judging it off a single visit tends to undersell what it can actually do.
Like any procedure, it comes with trade-offs — it takes more than one appointment, and how much change you’ll see depends on your starting fat volume and skin laxity. Ultimately, the choice depends on your face, your goals, and your budget.
If you’re curious whether InMode FX fits your jawline, a consultation is the best way to find out what a realistic session plan looks like for you. BeautyStone is a dermatology clinic in Seoul’s Hapjeong neighborhood — see current offers at /en/promotion.
Frequently Asked Questions
Q1. How many InMode FX sessions do I need for my jawline?
InMode FX is built around a series rather than a single visit. Most people feel a bit of firmness after the first session, and the jawline keeps sharpening as more sessions are completed. The exact number depends on your fat volume and skin laxity, which differ from person to person.
Q2. When will I start seeing results from InMode FX?
Because InMode FX works on the fat layer and the skin's collagen at the same time, change tends to show up in stages rather than all at once. Many people feel some firmness starting after the first session, with visible improvement building as sessions add up.
Q3. Who is a good candidate for InMode FX on the jawline and chin?
InMode FX tends to suit people dealing with a mix of submental fat and loose skin, since the treatment reaches both the fat layer and the dermis in the same pass. A consultation can help determine whether your double chin is mostly fat, mostly skin laxity, or a combination, and plan sessions accordingly.
Q4. How much does InMode FX cost?
Cost depends on the number of sessions recommended and the clinic's pricing, so there isn't a single flat rate. It's best to get a personalized quote after a consultation covering your fat volume and skin condition.
