Is ONDA a Face-Lifting Device or a Body Contouring Tool?

Hello, I am Dr. Kim Yeon-jin, Chief Physician at UHCELL Clinic Gangnam. When ONDA comes up in a consultation, most patients assume it is a facial lifting device, the same category as Ultherapy or Thermage. It is not. ONDA was developed by the Italian manufacturer DEKA primarily as a body contouring platform, and outside Korea it became established first as a treatment for the abdomen and upper arms rather than the face. For patients visiting on a short schedule who want to address both facial and body concerns, this distinction is not academic. It changes how we sequence a treatment plan.

Why ONDA Started as a Body Device

ONDA’s core technology is Coolwaves, a microwave energy delivered at 2.45 GHz, the same frequency band used in household microwave ovens. According to DEKA’s technical documentation, this frequency is preferentially absorbed by tissue with a higher water and fat content, which allows the energy to concentrate in the subcutaneous fat layer rather than dispersing across the skin surface. On that basis, ONDA was designed to address localized fat, cellulite, and skin laxity within a single platform, and in clinical use it has been applied most widely to body areas such as the abdomen, thighs, and upper arms.

This is where ONDA diverges from facial lifting devices. Ultherapy concentrates ultrasound energy at a single depth to reach the SMAS layer, and Thermage uses radiofrequency to heat the dermis, and both were engineered specifically to lift sagging skin on the face and neck. ONDA’s energy delivery is designed to reach the fat layer, so the target tissue itself is different from a facial lifting device, not simply a different setting on similar equipment.

How Fat Reduction and Skin Firming Happen Together

The microwave energy is designed to protect the skin surface while selectively heating the fat layer beneath it. Body treatments generally use the larger, deep handpiece, which is intended to disrupt fat cell membranes so that cellular contents are released and gradually cleared through the body’s normal metabolic processes. At the same time, the same heat causes an immediate contraction of dermal collagen fibers and stimulates new collagen production. This dual action, on fat and on the dermis in the same session, is why ONDA is classified as a contouring device rather than a fat-dissolving treatment alone.

A 2024 review published in the journal Bioengineering, compiled by an international advisory board of practitioners using the device, described this combined mechanism: microwave energy disrupts fat cell membranes while simultaneously triggering dermal collagen remodeling. An earlier study published in the journal Dermatologie followed patients treated for abdominal fat and reported reduced circumference measurements four weeks after treatment. Results like this vary by study design and patient population, and how much a given patient notices depends on their starting fat volume and skin condition, a point I always raise in consultation rather than leaving it as an assumption.

Pain, Downtime, and Treatment Time

Each handpiece has a built-in cooling function that keeps the skin surface temperature low while energy is delivered underneath. Because of this, most sessions do not require anesthesia and the discomfort is generally mild. Treatment time varies by area but typically runs between 15 and 30 minutes, short enough that some patients schedule it over a lunch break and return to their afternoon plans.

Many patients notice their skin feels firmer immediately after treatment, which is the visible result of the immediate collagen fiber contraction. The separate process, actual collagen remodeling as new collagen fibers form and settle, develops gradually and tends to become noticeable starting around one to two weeks after treatment. I explain this timeline before treatment, not after, because a patient who expects the immediate tightness to be the final result is often disappointed when they check back at the two-week mark without knowing a second phase was still coming.

How Many Sessions, and What Aftercare Looks Like

For a more pronounced result, the general protocol is three to five sessions spaced three to four weeks apart. For international patients visiting Seoul on a short trip, multiple return visits are often not realistic. In that situation, the more useful approach is to build the full treatment plan and a realistic revisit schedule during the first consultation, rather than deciding session by session.

For a few days after treatment, we recommend avoiding saunas or steam rooms and other environments that raise body temperature quickly, along with staying well hydrated. Mild redness or swelling at the treated area typically settles within a few days. If pain is unusually intense, or if there is a change in skin color that does not match the expected course, that warrants a clinic visit rather than waiting it out.

Recovery Support for Short-Stay Patients

For patients balancing a body treatment with a tight travel schedule, where recovery happens matters as much as which device is used. Our Gangnam location operates inside a UHC group hotel building, and hotel guests can use the oxygen chamber and vitamin IV drip at no additional cost. That means the recovery period after a body contouring session can continue in the same building where a patient is staying, rather than requiring a separate stop across the city on a day when travel time is already limited.

FAQ

Can I get ONDA in the same visit as Ultherapy or Thermage?

Often, yes, because they address different concerns. If facial sagging is the primary issue, Ultherapy or Thermage would usually be the first consideration. If the concern is in an area like the arms or abdomen where fat and skin laxity overlap, ONDA tends to fit better. The right combination depends on a skin and body assessment first.

Can I fly home right after ONDA treatment?

Because the treatment itself carries relatively little recovery burden, same-day travel is often possible. That said, swelling can vary by treated area and by how quickly an individual recovers, so if you have a long flight scheduled, mention it during the consultation so we can plan around it.

Which body areas is ONDA typically used on?

It is most often used on the abdomen, upper arms, and thighs, areas where localized fat and reduced skin elasticity tend to occur together. The handpiece and energy settings differ by area, so we confirm the target zone first and set the treatment parameters accordingly.

Can I combine an oxygen chamber or IV drip with ONDA treatment?

Many patients plan for recovery alongside the treatment itself. Because our Gangnam location is inside a hotel building, hotel guests can use the oxygen chamber and vitamin IV drip free of charge, which allows recovery care to continue in the same space on the day of a body treatment.

Is there anything specific to watch for after treatment?

For a few days, avoid saunas or other high-heat environments and drink enough water. Redness and swelling usually resolve within a few days. If you notice pain or skin changes that feel different from what was discussed at consultation, we recommend coming in for a check rather than waiting.

If you are visiting Seoul on a short schedule and want to address facial and body concerns in the same trip, our aftercare guidance for lifting treatments covers how we sequence recovery across procedures. Individual results vary, and any treatment plan should follow a direct skin and body assessment.