Serene Clinic

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Director Kim Serim answers the questions patients ask most before treatment. Prices are as of the October 2026 menu.

Skin Boosters ·

How do Juvelook Booster and Juvelook Volume differ, and how do you choose between Juvelook and Rejuran?

Juvelook is a collagen booster that combines PDLLA particles with hyaluronic acid. Juvelook Skin (often called Juvelook Booster) is placed in the upper dermis to address texture, fine lines, pores and firmness, while Juvelook Volume goes deeper to gradually fill hollow areas such as the cheeks and temples. If your skin is thin, dries out easily or has become sensitive, Rejuran with its PN ingredient is often the better first step; for firmness and texture we choose Juvelook Skin, and for hollowing, Juvelook Volume.

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Lifting ·

Ulthera, Thermage, or Xerf: which lifting suits my face?

Ulthera focuses ultrasound on single points and reaches the SMAS, the layer that supports the face, so it is mainly used for sagging such as a blurred jawline or drooping cheeks. Thermage and Xerf use radiofrequency to heat the whole skin layer broadly, which suits skin that has become thin and loose. When sagging and loss of skin firmness occur together, ultrasound and RF are sometimes planned together.

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Skin Boosters ·

Does Rejuran Healer have to be done by manual (hand) injection? Differences by injection method and how to reduce pain

Rejuran Healer is a skin booster that places polynucleotides (PN), purified from salmonid fish DNA, into the dermis to restore the skin's base. Manual (hand) injection, placed point by point with a needle, adds tiny physical injuries to the dermis, which can be an advantage where regeneration needs to be drawn out strongly, as with scars. But when the goal is overall skin condition, such as inner dryness or the skin barrier, research suggests the results differ little from an injector device or a cannula. That is why Serene Clinic uses manual injection or the lower-pain X-Injector depending on the goal.

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Volume ·

How much lip filler looks natural, and how long does it last?

Lip filler uses hyaluronic acid filler, placed in small amounts along the lip border and in the red part of the lips, to refine shape and volume. A first session usually starts at around 0.5–1cc, aiming for an upper-to-lower lip ratio of roughly 1:1.5. Results typically last 6 months to a year, with wide individual variation. Swelling peaks on days 2–3 and mostly settles within 1–2 weeks.

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Volume ·

Should neck wrinkles be treated with filler or a thread lift?

If two or three horizontal neck lines are deeply etched, neck filler is the quickest way to fill them. If the whole neck has thinned and lost elasticity, volume thread lifting, which uses dissolvable threads to support collagen production, is a better fit. Vertical neck lines that appear when you lift your head may need Botox, so we first identify the type of wrinkle and then use one treatment or a combination.

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Lifting ·

Xerf 300 shots vs 600 shots: what's the difference, and how do I choose?

With Xerf, more shots is not automatically better. What matters is which areas are treated and how densely. To refine specific areas such as the jawline, deep cheeks, or double chin, 300 shots is often suitable. When overall facial firmness has declined or the skin is thick, 600 shots, which allows enough time for heat to stay in the tissue, is often a better fit.

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Lifting ·

How is Coolsonic different from Ulthera, and who is it right for?

Like Ulthera, Coolsonic is a lifting treatment that uses high-intensity focused ultrasound (HIFU) to deliver heat down to the SMAS layer. But it adds a cooling structure that cools the skin during treatment, so there tends to be less heat and less pain. It suits people trying lifting for the first time, those who want to start early before sagging becomes significant, and those who need to go to work the next day.

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Lifting ·

How is OPUS UniFace different from other radiofrequency (RF) treatments?

OPUS UniFace is a unipolar RF device that uses a 40.68MHz electromagnetic field, without a grounding pad, to deliver heat evenly to deep layers of the skin. Its Spin Activator tip rotates while pressing on the skin, adding physical stimulation. This makes it an alternative for people with thick skin or those who didn't notice much change with previous RF treatments.

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Lifting ·

How does ONDA lifting refine the facial contour?

ONDA lifting uses 2.45GHz microwaves to vibrate water molecules in the skin, delivering heat to both the dermis and the subcutaneous fat layer. It stimulates collagen regeneration in the dermis and a reduction of fat cells in the fat layer. So it is mainly used on cheeks and jawlines where sagging and excess fat occur together.

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Lifting ·

Does ONDA lifting hurt? How should I care for my skin afterward?

ONDA lifting is performed while continuously cooling the epidermis. So rather than the sharp pain of needle or ultrasound lifting, many people feel deep warmth. Most people can return to daily life right away. You only need to avoid strenuous exercise and saunas on the day, and strong massage.

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Lifting ·

When do Ulthera results appear, and how long do they last?

You may feel some tightening right after Ulthera, but the real changes from collagen regeneration usually develop over 2–3 months. Results are known to last about 6 months to 1 year on average, varying with skin thickness and the degree of aging.

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Scars & Pores ·

How does acne scar treatment differ by scar type?

Acne scars are treated differently depending on their shape. Wide, sunken rolling scars usually call for subcision, which releases the fibers pulling the scar down. Boxcar and shallow scars are mainly treated with microneedle radiofrequency such as Potenza. Narrow, deep ice pick scars are handled with methods that treat each scar individually, used alongside the others.

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Lifting ·

Is a thread lift right for a "peanut-shaped" face with hollow, sagging cheeks?

With a peanut-shaped face, a thread lift that only pulls can make the hollow areas stand out more. It is often more natural to combine threads (such as Jamber threads) placed in a planned direction to support sagging tissue back into place, with volume treatments to fill the hollow areas.

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Pigmentation & Melasma ·

Why does melasma come back even after laser treatment?

Melasma is not just a problem of pigment in the epidermis. It is a chronic condition involving pigment in the dermis, increased blood vessels, hormones, and UV exposure, so it doesn't go away in one session and often recurs. Results last longer when low-energy toning is split into multiple sessions 2–4 weeks apart, combined with sun protection.

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Pigmentation & Melasma ·

Will I get scabs after laser for freckles and lentigines?

It depends on which treatment you get. Toning, which brightens the overall facial tone, rarely causes scabs, so you can go to work right away. Removal procedures that target lentigines or dark freckles one by one leave small scabs at each spot, which fall off after about 5–7 days.

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Skin Conditions ·

Why do flat warts come back even after removal?

Flat warts are a skin infection caused by human papillomavirus (HPV). Even after visible lesions are removed, they can come back if virus remains in the surrounding skin or spreads through scratching. That is why it matters to remove even small ones thoroughly early on, then follow up and treat further as needed.

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Volume ·

What is the difference between collagen injections and filler?

Filler uses hyaluronic acid gel to create volume immediately, in proportion to the amount injected. Collagen injections deliver collagen itself or ingredients that help collagen production, so the skin fills in on its own over several weeks. If you need a precisely defined shape, filler fits better. If you want to fill a wide area naturally or also improve skin texture, collagen injections fit better.

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Scalp & Hair Loss ·

Who can benefit from stem cell hair-loss injections?

Stem cell hair-loss injections are a supportive treatment that delivers regenerative ingredients to the scalp to improve the environment around the hair follicles. They help most in the early stage, when hair starts to thin and shed more. For hereditary hair loss, they are meaningful when combined with basic treatment such as oral and topical medication.

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