Once your jawline starts to soften or a double chin catches your eye, you'll hear the names InMode and Shurink a lot. Both promise to redefine a drooping jaw without surgery, but the moment you sit down for a consultation, the explanations blur together—"it's radiofrequency," "it's ultrasound"—and it's hard to pin down what actually sets them apart.

The short answer: both devices share the same basic idea of using heat to stimulate collagen, but the type of energy that creates the heat and the layer it reaches are different. That's why one leans toward concerns with a fatty edge, like a double chin, while the other suits firmness-related concerns, like a sagging jawline. Rather than asking which device is "better," it helps to ask which layer your concern actually lives in.

> This article gathers treatment information from Hapjeong Beautystone.

What you'll take away

• How InMode and Shurink differ in the way they generate heat

• Whether a double chin or a sagging jawline points you toward one or the other

• What the treatment feels like and roughly how recovery unfolds

• When the two devices are used separately, or paired together

InMode and Shurink both use heat to lift the jaw, but the energy differs

Both devices create heat beneath the skin to prompt collagen stimulation. When collagen fibers take in heat, they contract right away, and over the following weeks new collagen builds in, firming up the jawline. The difference lies in what kind of energy makes that heat, and which layer it reaches.

InMode uses radiofrequency* energy to deliver heat down to the dermis and the fat layer beneath it. Looking at clinical evidence that radiofrequency heats the dermis to boost type 1 and type 3 collagen and firm the skin makes it clear why firmness rises gradually over the weeks after a single session. Shurink focuses ultrasound onto a single point to create tiny coagulation points deep in the dermis, so even though it's also lifting, it tends to target one layer more intensively.

radiofrequency*: electromagnetic energy that creates heat beneath the skin to stimulate collagen. It warms the dermis to prompt firmness recovery.

Radiofrequency vs ultrasound: comparing the two approaches

They're grouped under the same jawline lifting, but a different energy type means a different target layer and a different feel. Lined up point by point, here's how the two devices compare.

The table shows that even for the same jawline concern, the two work on different spots. InMode tends to be stronger for a double chin with a fatty edge, while Shurink shines at refining the firmness of a sagging jawline. So rather than seeing them purely as rivals, they're sometimes split by concern—or used together.

Double chin or sagging jawline: which one suits where

Before the device name, the first thing to look at is whether your concern is a fat issue or a firmness issue. If the soft fullness you can pinch under the chin is what bothers you, an approach that reaches deeper layers fits better; if a blurring jawline edge is the worry, an approach that focuses on firmness helps more.

If your skin runs thin and sensitive, how the treatment feels can also sway your choice. Some people prefer the gentler warming sensation, while others want one clear, defined stimulus. That said, even with the same device, the output and depth have to be set differently for each person, so the final call is safest made with a provider who has actually looked at your jawline.

Why Hapjeong Beautystone

Rather than leading with a device name, Hapjeong Beautystone tends to start by pinpointing which part of your jawline is the real concern. Even for the same double chin, the right approach shifts depending on whether it's down to fatty fullness or to a loss of firmness, so we look at each person's skin thickness and fat distribution before settling on the device and the output. As a small clinic within walking distance of Hapjeong Station, we can watch how things progress after treatment and fine-tune the timing of your next step together.

How the treatment and recovery go

Both devices start with numbing cream, and the treatment itself runs about 20–30 minutes depending on the area. During it, you'll feel the heat rise and ease, and right after you finish, a little redness or a lingering warmth can remain. For most people it settles within a few hours to a day, and you can usually get back to your day the same day.

The results sharpen with time rather than right after the session. Since new collagen takes a while to build in, the jawline typically refines in stages over several weeks. Mapped out week by week, it draws roughly this curve.

Because the effect comes up slowly like this curve, it's better to give it about 8–12 weeks and watch the change rather than judging after a single session. How long results last varies from person to person, so the timing of your next treatment is safest decided with a provider as you track your progress. This article is general information, so whether a treatment is right for you is best decided in consultation with a provider who has examined you directly.

Frequently asked questions

Q. Do I have to choose just one—InMode or Shurink?

A. You don't necessarily have to pick only one. Because the two devices reach different layers, they can split a double chin and jawline firmness between them, or be used together with some time in between. That said, instead of pushing to do both in one day, it's steadier to settle on your top-priority concern first and watch how it goes. Which combination fits is best decided with a provider who has looked at your jawline.

Q. Does the fat in a double chin shrink too?

A. Neither device is a treatment that removes fat directly. That said, an approach like InMode that reaches deeper layers can help tighten the skin so the line under the chin looks tidier. If you have a genuinely large amount of fat, a different approach may suit you better, so it's worth weighing up together during a consultation.

Q. How much does it hurt?

A. Since it's done after numbing cream, it's often not at a level that's hard to bear. People mostly report a warm, heating sensation with InMode and sharp, pinpoint heat with Shurink. Pain sensitivity differs from person to person, so if you let us know beforehand, we can adjust the output and pace for you.

Q. Is there anything to be careful about afterward?

A. On the day of treatment, it's best to avoid activities that sharply raise heat and blood flow, like saunas, jjimjilbangs, or intense exercise. Be more thorough than usual with sun protection. Redness or warmth usually settles within a day, but if swelling or pain carries on for several days, please check in with the provider who treated you.

Further reading

• It's been a few days since my InMode treatment and I still feel heat or tingling—is that normal?

• How does Shurink lifting for men differ from the treatment for women, and what needs extra attention?

• I had Shurink but the effect seems weak—did I do something wrong, or is this just how it is?

• I want Thermage and Ultherapy together—which should I do first, and how long should I leave between them?