How Onda lifting works — why microwaves differ from ultrasound and RF | Obliv Seoul Origin

What fundamentally sets Onda lifting apart from ultrasound and radiofrequency lifting is its energy source. Onda lifting uses microwaves (Coolwaves) to vibrate the water molecules within the skin, delivering heat to the subcutaneous fat layer and the dermis. Treatments may all carry the same 'lifting' label, but the energy they use determines how deep the heat reaches and which tissues it acts on — and once you understand this principle, it becomes clear why Onda lifting is described as addressing fat and laxity together. In this article we walk through what microwaves are and how they act on each layer of the skin, with the science at the centre.

In three lines
① What separates lifting methods is the energy source — and Onda lifting uses microwaves.
② Microwaves vibrate water molecules, spreading heat broadly through the water-rich dermis and subcutaneous fat layer.
③ The epidermis is protected by cooling — the design keeps the surface safe while warming the layers beneath.

The energy source is what separates lifting treatments

The quickest way to understand the differences between lifting treatments is to look at what kind of force generates the heat.

Ultrasound methods focus multiple sound waves onto a single point, creating an instant burst of high heat at that spot — which is why they act intensely, point by point, at depth. Radiofrequency methods generate heat from the resistance tissue puts up against an electrical current, spreading warmth through the dermis as the current passes. Microwaves, by contrast, work much like a microwave oven heating water: they make water molecules spin and vibrate rapidly, and the friction produces heat. All three share the broad goal of stimulating collagen with heat, but because they generate that heat differently, the tissues and depths they reach best also differ. This is why, when choosing a lifting treatment, the energy source matters more than the name.

Skin is built in layers

Skin is not a single membrane but a stack of layers, from the epidermis down to the fascia. To properly understand lifting, it helps to picture this layered structure first.

Each layer has its own role, and concerns such as sagging or fullness can originate in different layers. Broadly, the skin divides as follows.

Layer	Approximate position	Main role
Stratum corneum & epidermis	The outermost surface	A barrier holding in moisture and keeping out external irritants
Upper dermis (papillary)	Just beneath the epidermis	Supplies nutrients through fine capillaries
Lower dermis (reticular)	The deeper part of the dermis	Dense in collagen and elastic fibres (the key to firmness)
Subcutaneous fat layer	Beneath the dermis	Fat cells create volume and thickness
Fascia (SMAS)	The deepest supporting layer	The framework holding the face's structure

Once you look at the skin in these layers, it becomes clear that the real criterion for choosing a lifting treatment is which method reaches which layer. Where ultrasound methods target the deep fascia and radiofrequency methods mainly target the dermis, Onda lifting acts on the subcutaneous fat layer and the dermis that sit between them — together.

Why microwaves reach the fat layer and the dermis

Microwaves act on the subcutaneous fat layer and the dermis together because these layers hold water — an environment where microwaves generate heat readily.

As described above, microwaves produce heat by vibrating water molecules. The dermis is rich in water and collagen, and the subcutaneous fat layer holds water too. So microwaves can deliver heat relatively broadly and evenly across both layers. Rather than concentrating on a single point, they warm a plane of tissue — which is why this approach is described as able to target both layers at once in areas where slackened firmness and the fullness beneath it overlap. The phrase 'fat and laxity together' from our complete guide to Onda lifting comes precisely from this working depth of microwaves.

Cooling: protecting the surface while warming what lies beneath

Any heat-based treatment invites the question: what about the epidermis? Onda lifting is designed to run with a cooling system chilling the surface of the treatment area throughout.

To deliver heat to the deeper layers, the energy inevitably has to pass through the skin's surface — so the epidermis is protected by cooling to keep it from taking on excessive heat. The surface is chilled and protected, while the energy is carried to the dermis and fat layer where the heat is needed. This is why Onda lifting is also known as 'Coolwaves'. That said, how much warmth or discomfort you feel varies by area and by person, so rather than assuming it is entirely pain-free, it is better to raise any concerns at your consultation beforehand.

Understand the principle, and the question becomes which layer to treat

Follow the principle through, and you arrive at the real crux of choosing a lifting treatment: which layer does my concern come from? This is why Obliv talks about layer-led design before putting any single device forward.

Just as reinforcing a building starts with finding which storey's framework is weak, it is natural with skin to first diagnose which of the epidermis, dermis, fat layer or fascia needs treating, and then choose the method. That is the starting point of what we at Obliv call Skin Architecture. Within this design, Onda lifting is one tool, chosen for concerns where the fat layer and the dermis are intertwined. Once you know the character of microwaves as an energy source, it makes sense why this treatment is recommended for certain concerns. And because it is hard to judge by eye which layer is really behind your concern, a consultation with our medical team to assess your skin before you begin matters more than anything.

Does Onda lifting work like a microwave oven?

In the basic way it creates heat — by vibrating water molecules — yes, the principle is similar. The difference is that Onda lifting is a medical device engineered to act gently on the deeper layers of the skin only, protecting the epidermis with cooling and controlling the depth and output precisely.

Is Onda lifting better than ultrasound or radiofrequency lifting?

It is less a question of which is superior than of which layer each targets. Deep fascial sagging, dermal firmness, or concerns spanning the fat layer and dermis each call for a different approach — so it is best to confirm the right direction for your skin through a consultation.

Are microwaves harmful to the body?

The microwaves used in Onda lifting are controlled to a set output and depth, and the design protects the epidermis with cooling. Suitability can still vary with your skin and general health, however, so a consultation with our medical team is needed before you begin.

※ This content complies with the legislation governing medical advertising and is intended as general information. Treatment effects and responses vary from person to person; please seek an accurate diagnosis and consultation from a medical professional.