What Onda Lifting Is, and How It Differs From HIFU and RF

Onda is an energy-based device made by DEKA, an Italian maker of medical lasers based near Florence. Where most lifting devices use light, ultrasound or radiofrequency, Onda uses microwaves at a frequency of 2.45 GHz, which the company markets as Coolwaves. The platform first appeared in 2018 as a body treatment for localized fat, cellulite and loose skin. The newer Onda PRO added a handpiece called Pocket, designed for the face, which DEKA lists for lifting, firming and the area under the chin. In Seoul, the face treatment is simply known as Onda lifting.

Microwaves warm tissue through dielectric heating: the field makes water molecules oscillate, and that motion turns into heat. According to DEKA, the energy is absorbed mainly in the fat layer beneath the skin rather than spread across the surface, while a cooling plate built into the handpiece protects the top layer. The intended effect is twofold. Fat cells damaged by the heat are cleared by the body over the following weeks, and collagen contracts and slowly remodels. Each handpiece works at a different depth. Published descriptions place the Pocket at about 3 mm, the Shallow at about 7 mm and the Deep, used on the body, at around 12 mm.

The other lifting energies on a Seoul clinic menu work on different principles:

• HIFU focuses ultrasound into small points of heat at set depths, including the deeper support layer known as the SMAS. Our guide to HIFU lifting in Korea covers how those devices are used.
• Monopolar radiofrequency heats tissue through electrical resistance and spreads warmth through the dermis over a broader area.
• Laser-based lifting, such as titanium lifting, delivers its energy as light.
• Microwave lifting aims its heat at the boundary where skin meets fat, with the depth set by the handpiece.

These are different tools, not rungs on a ladder. Which one fits depends on what is changing in your face, and doctors often sequence or combine them. It is also worth knowing how young the evidence is. Much of the mechanism described above comes from the manufacturer and from small clinical studies, and an international expert panel review published in 2024 noted that long-term data on safety and effectiveness are still missing.

Who It Suits: Soft Jawlines and Under-Chin Fullness

The face where Onda tends to make sense has two things going on at once: a modest amount of fat that blurs the line of the jaw or gathers under the chin, and early, mild laxity in the skin above it. Typical requests are a jawline that has softened, fullness under the chin that shows in photos and video calls, heaviness along the lower cheek, and a wish for a slightly firmer lower face without needles or incisions.

The face data are early but encouraging. A small study published in 2025 treated ten women with moderate to severe laxity under the chin, using the Pocket handpiece twice, a month apart. The authors reported improved laxity scores twelve weeks after the last session and no adverse effects. With ten participants and no control group, that is a promising signal rather than proof. Studies on the body, where Onda has a longer track record, point in the same direction for fat reduction.

Doctors also weigh skin thickness, age and what you actually want. If the goal is a slimmer, tighter lower face, Onda is a reasonable conversation. If the goal is to put back volume that has gone, a fat-targeting energy is pointed the wrong way. It appeals to visitors for practical reasons: there are no needles or incisions, and the appointment is short enough to fit around a trip.

The Appointment: Steps, Downtime and Sessions

A visit usually starts with a consultation and photos. Makeup is removed, the treatment area is marked, and some clinics apply numbing cream while others do not. The handpiece is held in contact with the skin and moved over the area in passes while its cooling runs. The sensation is usually described as a deep warmth that builds, with hotter moments over the jaw and under the chin. Comfort varies from person to person, so say so if the heat turns sharp. Allow time for the consultation as well as the treatment, because first visits run longer.

Afterwards, expect redness and warmth for a few hours, and mild swelling, tenderness or a bruised feeling along the jaw for a few days. Some people notice temporary numbness or small firm spots under the skin. The 2024 expert review says these nodules usually resolve over weeks, on average in about two and a half months, though rare cases last longer. Burns are rare and are linked to improper use, which is why the person holding the handpiece matters. The same review advises avoiding the sun for two days. Most people return to everyday plans, but do not book Onda the day before a flight home or a big event, and keep a few days in Seoul in case you want a follow-up check.

Session plans vary by clinic and by face. The 2025 face study used two sessions about a month apart. Body protocols in the expert review run to about four sessions at four-week intervals, and the same area should not be retreated within 15 days. Many clinics start with one face session and reassess. Change from fat clearance and collagen remodeling builds gradually over weeks to a few months; the tightness some people see in the mirror on day one is partly swelling. How long results last has not been established by long-term studies.

What Onda Lifting Can't Do

It can't promise the same result for everyone. The same settings land differently on different faces. Skin thickness, the amount and depth of fat, age and the way each body heals all change the outcome. Some people see a clear difference, some a subtle one, and some very little. Nobody can tell you in advance which group you will fall into.

It is a poor match for lean faces. Onda works partly by heating fat. If there is little fat to begin with, there is less to work on, and reducing it further can make hollows under the cheekbones or at the temples look deeper. People with very slim faces are often better served by other approaches, and a careful doctor will say so.

It doesn't replace surgery, fillers or other tools. It cannot lift heavy, loose skin the way a surgical lift does. It doesn't restore volume lost with age, and it doesn't treat lines from facial expression. It doesn't change bone or muscle either: a wide lower face from a strong masseter muscle or the shape of the jaw will not respond like fat does.

It isn't for everyone medically. The expert review lists pregnancy and breastfeeding, a pacemaker or other implanted electronic device, cancer within the past five years, severe vascular disease, poorly controlled diabetes and reduced heat sensation among the reasons not to treat. Tell the doctor about blood thinners, autoimmune conditions and any recent filler or botulinum toxin in the area.

Diagnosis comes first. Fullness under the jaw isn't always fat. Salivary glands, lymph nodes, muscle and fluid retention can look similar, and a new lump or sudden swelling needs a medical check, not a lifting device. That is why the consultation matters more than the machine. Our guide to a first dermatology clinic consultation in Seoul explains what to expect in that conversation.

If you are planning a treatment in Seoul, BeautiPin can help as its own service. BeautiPin is a registered foreign patient facilitation agency in Korea: you can browse the clinics we work with or send us a message on Instagram, including about a clinic you already have in mind. We arrange consultations; the treatment decision stays with you and the doctor.