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Soft jawline? Meet Onda.

Some people visit our clinic because they feel their face looks puffy or their jawline has become less defined. These changes are not always just about skin elasticity; the distribution of fat in the double chin or lower face can also play a role. Onda can be an option for those with these concerns.


Shape concerns caused by facial fat

Facial fat is not simply a matter of having too much or too little. Its distribution can shape the impression your face gives.

Localized fat in the double chin or lower face can make the jawline appear less defined and the lower face feel heavy. For some, refining the localized fat, alongside addressing skin elasticity, can help establish a clearer contour.

What is Onda?

Onda is a technology that uses microwave energy to deliver thermal energy to fat cells in specific areas. Unlike typical diets or exercise, it allows for targeted fat management in localized spots.

As the body goes through its natural recovery process after the procedure, changes in the localized fat layer can be induced, which may help the lower facial contour appear more refined. It can also help improve skin elasticity, making the jawline look more defined.


How Onda works: microwave energy delivery method

When Onda is considered

  • Those concerned about double chin fat

  • Those wishing to refine their lower facial contour

  • Those who want to keep their jawline more defined

  • Those who want to refine fat in localized areas such as the upper arms, flanks, or abdomen

However, not all undefined jawlines are due to fat. Various factors, such as reduced skin elasticity, double chin fat, muscle development, and bone structure, can work together. Therefore, it is important to choose the appropriate treatment method after carefully evaluating your individual facial structure and fat distribution.

What are the features of Onda?

One feature of Onda is that it manages fat areas using thermal energy, yet the recovery period after the procedure can be relatively short.

  • Pain and downtime — The handpiece's cooling system operates during the procedure, and some individuals undergo it without anesthesia. The return to daily activities can also be relatively quick.

  • Targeted treatment — The depth of energy delivery can be adjusted depending on the handpiece used.

  • Cumulative effect — The number of sessions and intervals required may vary depending on the individual's condition.

Onda can be a procedure focused on refining facial lines with a reduced burden, based on natural results.

How does Onda work?

Onda is a heat delivery technology that uses microwave energy. The delivered energy mainly vibrates water molecules within the fat tissue, and the thermal energy generated during this process acts on the fat cells.

According to the design standards disclosed by the manufacturer, approximately 80% of the delivered energy is distributed to the subcutaneous fat layer, with the remaining 20% to the epidermis and dermis layers. A key feature of this technology is that it is designed to deliver most of the energy to deeper layers rather than the skin surface. Additionally, the handpiece's cooling function operates during the procedure to help reduce the thermal burden on the epidermis.

At Rezero Clinic, we use two types of handpieces with different target depths. The shallower handpiece mainly targets the localized fat layer, while the deeper one delivers thermal energy to the fascia layer, taking both elasticity and lifting aspects into account. How these are combined depends on the individual's facial structure and fat distribution.

Fat cells that receive thermal energy can gradually decrease through the body's natural recovery process. In addition, the heat delivered to the dermis layer can induce collagen remodeling, which can help manage skin elasticity in the treated area.

The mechanism of Onda: thermal energy delivery and collagen remodeling

Side effects and precautions

As with all medical procedures, Onda can have side effects. Depending on the individual, redness, swelling, warmth, and mild pain may occur, as well as hollow cheeks, mild burns, bruising, or changes in skin sensitivity. These symptoms tend to improve over several days to weeks, though recovery speed varies by individual.

In particular, as a thermal energy-based treatment, there is a possibility of burns or epidermal damage. Therefore, it is important to inform the medical staff about your skin condition, underlying diseases, and medications through a thorough consultation before the procedure, and to receive proper guidance on post-treatment care.

The Rezero Clinic approach

Rezero Clinic decides on treatments based on precise diagnosis. Since the concerns of those who wish to improve their lower facial contour vary, Onda may be helpful for some, a combination of other procedures may be necessary for others, and maintaining the current appearance may be the best choice for some.

We will look at your face together, determine what changes are truly needed, and help you decide which procedure is a suitable and reasonable choice for you. If you are concerned about your jawline and lower facial contour, Onda can be one of the options to consider.

Trusted Care, Lasting Results

Trusted Care, Lasting Results

Rezero Clinic

Location

2nd Floor, 61 Sincheon-daero 50beon-gil, Busanjin-gu, Busan

Medical Director

Tae-bong Son

Business Registration

344-21-02387

Phone

051-715-7227

Opening Hours

Normal

Mon

10:30 - 19:30

Wed

10:30 - 19:30

Fri

10:30 - 19:30

Late

Tue

10:30 - 21:00

Thu

10:30 - 21:00

Early

Sat

10:30 - 15:00

Sun

10:30 - 15:00

Break

13:00 - 14:00

© 2026, Rezero. All rights reserved.

Designed by HSF

Blog

>

Columns

Soft jawline? Meet Onda.

Some people visit our clinic because they feel their face looks puffy or their jawline has become less defined. These changes are not always just about skin elasticity; the distribution of fat in the double chin or lower face can also play a role. Onda can be an option for those with these concerns.


Shape concerns caused by facial fat

Facial fat is not simply a matter of having too much or too little. Its distribution can shape the impression your face gives.

Localized fat in the double chin or lower face can make the jawline appear less defined and the lower face feel heavy. For some, refining the localized fat, alongside addressing skin elasticity, can help establish a clearer contour.

What is Onda?

Onda is a technology that uses microwave energy to deliver thermal energy to fat cells in specific areas. Unlike typical diets or exercise, it allows for targeted fat management in localized spots.

As the body goes through its natural recovery process after the procedure, changes in the localized fat layer can be induced, which may help the lower facial contour appear more refined. It can also help improve skin elasticity, making the jawline look more defined.


How Onda works: microwave energy delivery method

When Onda is considered

  • Those concerned about double chin fat

  • Those wishing to refine their lower facial contour

  • Those who want to keep their jawline more defined

  • Those who want to refine fat in localized areas such as the upper arms, flanks, or abdomen

However, not all undefined jawlines are due to fat. Various factors, such as reduced skin elasticity, double chin fat, muscle development, and bone structure, can work together. Therefore, it is important to choose the appropriate treatment method after carefully evaluating your individual facial structure and fat distribution.

What are the features of Onda?

One feature of Onda is that it manages fat areas using thermal energy, yet the recovery period after the procedure can be relatively short.

  • Pain and downtime — The handpiece's cooling system operates during the procedure, and some individuals undergo it without anesthesia. The return to daily activities can also be relatively quick.

  • Targeted treatment — The depth of energy delivery can be adjusted depending on the handpiece used.

  • Cumulative effect — The number of sessions and intervals required may vary depending on the individual's condition.

Onda can be a procedure focused on refining facial lines with a reduced burden, based on natural results.

How does Onda work?

Onda is a heat delivery technology that uses microwave energy. The delivered energy mainly vibrates water molecules within the fat tissue, and the thermal energy generated during this process acts on the fat cells.

According to the design standards disclosed by the manufacturer, approximately 80% of the delivered energy is distributed to the subcutaneous fat layer, with the remaining 20% to the epidermis and dermis layers. A key feature of this technology is that it is designed to deliver most of the energy to deeper layers rather than the skin surface. Additionally, the handpiece's cooling function operates during the procedure to help reduce the thermal burden on the epidermis.

At Rezero Clinic, we use two types of handpieces with different target depths. The shallower handpiece mainly targets the localized fat layer, while the deeper one delivers thermal energy to the fascia layer, taking both elasticity and lifting aspects into account. How these are combined depends on the individual's facial structure and fat distribution.

Fat cells that receive thermal energy can gradually decrease through the body's natural recovery process. In addition, the heat delivered to the dermis layer can induce collagen remodeling, which can help manage skin elasticity in the treated area.

The mechanism of Onda: thermal energy delivery and collagen remodeling

Side effects and precautions

As with all medical procedures, Onda can have side effects. Depending on the individual, redness, swelling, warmth, and mild pain may occur, as well as hollow cheeks, mild burns, bruising, or changes in skin sensitivity. These symptoms tend to improve over several days to weeks, though recovery speed varies by individual.

In particular, as a thermal energy-based treatment, there is a possibility of burns or epidermal damage. Therefore, it is important to inform the medical staff about your skin condition, underlying diseases, and medications through a thorough consultation before the procedure, and to receive proper guidance on post-treatment care.

The Rezero Clinic approach

Rezero Clinic decides on treatments based on precise diagnosis. Since the concerns of those who wish to improve their lower facial contour vary, Onda may be helpful for some, a combination of other procedures may be necessary for others, and maintaining the current appearance may be the best choice for some.

We will look at your face together, determine what changes are truly needed, and help you decide which procedure is a suitable and reasonable choice for you. If you are concerned about your jawline and lower facial contour, Onda can be one of the options to consider.

Trusted Care, Lasting Results

Trusted Care, Lasting Results

Rezero Clinic

Location

2nd Floor, 61 Sincheon-daero 50beon-gil, Busanjin-gu, Busan

Medical Director

Tae-bong Son

Business Registration

344-21-02387

Opening Hours

Normal

Mon

10:30 - 19:30

Wed

10:30 - 19:30

Fri

10:30 - 19:30

Late

Tue

10:30 - 21:00

Thu

10:30 - 21:00

Early

Sat

10:30 - 15:00

Sun

10:30 - 15:00

Break

13:00 - 14:00

© 2026, Rezero. All rights reserved.

Designed by HSF