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Hongdae Skin Care: An OOO Solution to the Double Challenge of Air Conditioning and UV Exposure

차이의원 · 아름다움의 차이, 차이의원입니다. · July 10, 2025

"My skin feels tight when the air conditioner is on, but when I go outside, it stings from the UV rays..." "It’s dry indoors, but outside I get a lot of sebum... How should I manag...

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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: 차이의원

Original post date: July 10, 2025

Translated at: April 20, 2026 at 3:45 PM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

Hongdae Skin Care: An OOO Solution to the Double Challenge of Air Conditioning and UV Exposure image 1

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"My skin feels tight when the air conditioner is on, but when I go outside, it stings from the UV rays..."

"It’s dry indoors, but outside I get a lot of sebum... How should I manage it?"

"I want to improve my skin condition before summer vacation, but I don’t know what I should get in this weather."

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As the intense heat of early July begins in earnest, the number of people with these concerns is rapidly increasing. Indoors, there is dryness caused by air conditioning; outdoors, increased sebum secretion due to strong UV rays and high humidity... It is a time when skin is under stress all day long.

If you have searched for Hongdae skin care, you are probably looking for a way to fundamentally solve these complex summer skin concerns. In a situation where simple moisturizing or dead skin cell care has its limits, this can be seen as the time to strengthen the skin from within.

Today, for those considering Hongdae skin care, I will introduce representative skin booster products, and further, a lifting device that pairs well with those skin boosters.

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Hello, I am Director Jo Wonjin of Chaee Clinic.

Over the past nine years of performing aesthetic skin procedures in Hongdae, I have seen every year that, especially around this time, the number of people complaining of complex skin concerns increases.

When the temperature difference between indoors and outdoors exceeds 15 degrees Celsius, and the skin repeatedly experiences large environmental changes several times a day, the skin barrier weakens, moisture loss accelerates, and at the same time sebum secretion increases, creating a double burden.

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<Left> Rejuran <Right> Juvelook

What fundamentally improves these summer skin concerns is a "skin booster." And if you combine it with appropriate lifting, you can completely renew tired summer skin.

Today, for those looking into Hongdae skin care, I will introduce the golden combination of skin boosters and lifting that helps you beat the July heat.

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First, I will talk about two skin boosters that serve as summer skin saviors.

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First, Rejuran HB plus

"It looks oily on the surface, but it feels tight inside"—there are especially many people saying this in summer, and this is exactly when Rejuran is needed.

Rejuran is made of a component called polynucleotide, extracted from salmon DNA. The principle is to inject this component into the dermis to induce skin regeneration.

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In summer, we especially recommend Rejuran HB plus. This product adds hyaluronic acid, a moisturizing ingredient, and lidocaine, an anesthetic, to the existing Rejuran Healer, allowing strong hydration while placing less burden on skin worn down by air conditioning.

The moisture affinity of polynucleotide ingredients is truly excellent. Even when skin has become dry deep inside due to continuous exposure to air-conditioning wind, it can attract moisture and make the skin feel comfortable and hydrated from within.

Second, Juvelook

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Do fine lines look more noticeable and do your pores feel enlarged because of strong UV rays and high humidity? Then Juvelook is the answer.

Juvelook is a skin booster in which PDLLA polymer powder is diluted with sterile water for injection and injected into the subdermal layer. As it is called a "collagen stimulator," it stimulates collagen production and helps make the skin layer itself thicker and firmer.

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There are three reasons Juvelook is especially good in summer. It naturally improves fine lines caused by strong UV rays, tightens pores that have enlarged due to increased sebum secretion, and breathes new life into skin that has lost elasticity because of air conditioning.

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The true value of skin boosters in Hongdae skin care appears when they are combined with lifting. Based on nine years and more than 30,000 skin booster procedures, I will introduce the best combination.

Juvelook + RF lifting for summer synergy

The combination of Juvelook and RF lifting devices such as Thermage and Sylfirm creates truly remarkable synergy. Juvelook’s PDLLA ingredient has a melting point of 55 degrees Celsius, while RF lifting devices generate temperatures between 42 and 60 degrees Celsius.

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<Left, center> Thermage / <Right> Sylfirm

If you build the foundation with Juvelook before the peak heat of summer, and then manage it with RF lifting in the middle of summer, your skin care for the season is complete. Heat energy helps the PDLLA ingredient dissolve more smoothly and maximizes collagen production. We usually recommend Thermage or Sylfirm.

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Rejuran + LDM water-drop lifting for moisture replenishment

The combination of Rejuran and LDM water-drop lifting is specialized for summer moisture care. The synergy between LDM, which helps the skin layer hold moisture through ultrasound vibration, and Rejuran, which has high moisture affinity, is truly excellent.

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For skin that loses moisture all day between air-conditioning wind and UV rays, there is no better combination. You can experience a feeling of moisture building up deep within the skin.

Treatment timing and frequency

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Skin boosters are generally recommended at intervals of 3 to 4 weeks, for a total of 3 to 5 sessions. If you start in July, you can maintain the best skin condition through August and September and into fall.

The combination with lifting depends on your individual skin condition, but in general, receiving lifting together with the second or third skin booster session gives the best synergy.

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For those looking into Hongdae skin care, the most important thing is that no matter how good a procedure you receive, there is a limit if basic lifestyle habits are not in place.

In summer, it is important to use sunscreen more carefully than usual, drink enough water, and reduce the amount of time you are directly exposed to air-conditioning wind.

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Above all, personalized consultation that matches your skin condition is most important.

Even with the same summer skin concerns, skin type and lifestyle patterns differ from person to person, so just as Chaee Clinic’s philosophy says that no two skins in the world are the same, finding a solution that fits the individual is the most important thing.

In combined skin booster and lifting procedures, the most important factor is the practitioner’s skill in injecting the right amount at the correct depth. In particular, with Juvelook, the dilution ratio of the PDLLA ingredient and sterile water for injection, as well as the technique of accurately injecting into the subdermal layer, determine satisfaction.

If you want to bring vitality back to skin worn down between air conditioning and UV rays, it may be a good option to look into a skin booster and lifting combination that suits your skin condition.

I hope this was helpful information for those looking into Hongdae skin care, and I’ll wrap up here.

This was Chaee Clinic, where your beauty is customized. Thank you.

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