LinearZ effects: when can you feel them, and what is it used for?

LinearZ effects come about as high-intensity focused ultrasound (HIFU) creates small thermal coagulation points beneath the skin, and new collagen is produced as those spots recover. You may feel a tightening sensation right after treatment, but changes in firmness tend to appear gradually over several weeks. It is used when partial sagging, such as along the jawline or a double chin, is a concern, or when looking for a lifting treatment with less pain.

How does LinearZ produce its effects?

When ultrasound energy is focused on a single point, the temperature rises only at a set depth while the skin surface is barely affected. LinearZ can deliver this energy in dot and linear patterns, so broad cheeks and the jawline are treated evenly with the linear pattern, while narrow, curved areas like around the eyes are treated densely with the dot pattern.

Heated tissue contracts and creates a tightening sensation, and collagen and elastin are then produced during the recovery process. Changes in firmness build up while this recovery continues, so results do not appear all at once.

When LinearZ effects appear

• Right after treatment, you may feel your face tighten as the tissue contracts.
• Over several weeks, collagen begins to form, and some people notice changes in firmness from around one month.
• Dividing treatment into multiple sessions allows changes to build on each other, and how long results last varies with skin thickness, age, and lifestyle.

At our Suwon clinic, LinearZ is offered as a 400-shot option and proceeds in the order of personalized consultation, self-cleansing, treatment, and finishing care.

Aftercare and precautions after LinearZ

You can wash your face and apply makeup right after treatment, using a gentle cleanser. Temporary redness and warmth mostly subside within a few days, and for about a week, avoid irritants such as saunas, drinking, peels, and scrubs, and keep up with moisturizing and sun protection.

If you have relatively little facial fat, the cheeks may look hollow when energy concentrates in deep layers, so the depth and distribution of shots are adjusted. If you are pregnant or have wounds or inflammation in the treatment area, please let us know in advance, and if redness and pain do not decrease after several days, please contact the clinic.

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View the LinearZ procedure guide

FAQ

Q. Will a single LinearZ session make a difference?

A. Even after one session, you may feel a tightening sensation and changes in firmness a few weeks later, but the degree depends on skin thickness and the extent of sagging. Dividing treatment into multiple sessions at regular intervals is also used to build up changes, so the number of sessions is decided during consultation.

Q. How long do LinearZ effects last?

A. How long results last varies with age, skin thickness, degree of sagging, and lifestyle, so it is hard to give one answer. Collagen decreases again over time, so a maintenance interval is set based on your condition after completing your sessions.

Q. Can I get LinearZ without anesthesia?

A. Because the pain burden is relatively low, it is sometimes done without anesthesia depending on the situation. Areas close to bone, such as the jawline, may feel tingly or vibrating, so if you are sensitive to pain, tell us in advance during consultation and we will adjust the intensity.