When summer arrives, there's a story I hear noticeably more often in the clinic. Things like "The inside feels tight, but the surface is oily," or "My face gets sensitive more easily than it used to." It's a season when the skin barrier is easily thrown off, as you move between air conditioning and outdoor heat several times a day and the UV rays grow stronger too. A good number of people who come in considering Rejuran start from exactly this kind of oil-moisture imbalance around this time of year.
Rejuran is an injectable procedure known for delivering PDRN, or polynucleotide, into the skin to help organize the regenerative environment and support the moisture-holding capacity of the dermis. That said, the degree of change you feel and how long it lasts vary with each person's skin condition, and satisfaction often comes down to how pain is managed and how the procedure is tailored to the skin.
Why is the inside dry while the surface is oily in summer?
Oil-moisture imbalance isn't simply a problem of drinking too little water. When the skin barrier weakens, the moisture that should stay inside escapes easily, and as a reaction to make up for the lack of moisture, oil rises excessively, leaving only the surface looking oily. When you spend the whole day under air conditioning in summer and then step outside to face heat and UV rays, this vicious cycle stands out even more.
The reason Rejuran draws attention is that it focuses on addressing the moisture-holding environment of the dermis itself. If surface moisturizers work by soothing the surface, Rejuran takes the approach of organizing the regenerative environment within the skin. That's why those who repeatedly experience sensitivity and breakouts every summer can consider it as one option.
Of course, the same change doesn't appear in everyone. Even with the same procedure, some people feel moisture filling in from within relatively quickly, while others feel the change more slowly as several factors overlap. Why Rejuran's effect differs from person to person is covered in more detail in this article unpacking the reasons Rejuran's effect varies, from the clinic's perspective.
The same Rejuran, so why does satisfaction differ?
One pattern I often see in the clinic: among those who decided on Rejuran based only on price or a promotion, there are cases where the procedure's direction didn't match their own skin condition, so they didn't feel as much change as they had hoped. Even with the same Rejuran, the direction of the composition should differ depending on skin type, lifestyle environment, and the goal of the procedure.
That's why, at ON Clinic, we look at the skin condition first, before the procedure. The flow of what we check generally goes like this.
- First analyze the current skin condition with AI skin measurement
- Identify where the oil-moisture imbalance originates
- Based on those results, the medical team designs a procedure tailored to the individual
- Also guide you through the direction for soothing and home care after the procedure
Just as important as the number of sessions or the cost is what kind of consultation the procedure is built on. The difference in satisfaction mentioned earlier is, in many cases, ultimately tied to whether the design was made after examining the skin condition thoroughly. If you're considering Rejuran, we recommend confirming the direction first through a one-on-one consultation with the medical team before the procedure.
If you're curious whether a Rejuran procedure would suit your own skin, feel free to ask through getting a consultation by chat now.
If you're putting off the procedure because you're worried about pain
Because Rejuran is a procedure done with injections, many people hesitate over the burden of pain. When the topic of pain comes up in the clinic, I first point to the preparation process rather than the pain itself. Preparation considerably shapes how much pain you feel.
The preparation flow is set up like this.
- Before the procedure, apply numbing cream not thinly but built up in a thick layer
- Allow time for the cream to soak in sufficiently, dulling the skin's sensation
- Right after the procedure, continue soothing care such as cooling or LED to ease swelling and redness
Applying it thickly can help reduce the stimulation transmitted to the skin. Right after the procedure, temporary swelling, redness, and discomfort may accompany it, and pain or bruising may appear at the injection sites. These reactions appear differently depending on each person's skin condition.
There are also common misconceptions about how pain is handled. A representative one is the idea that the more painful the injection, the greater the effect, but pain intensity and procedure satisfaction don't directly correspond. This part is addressed separately in an article on what to look at before pain, and if the burden of pain is especially large for you, the guide addressing Rejuran HB pain is also worth referring to.
For a few days after the procedure, how should the skin be soothed?
After Rejuran, the skin may become temporarily sensitive. During this period, taking care of the soothing and home care direction is as important as the procedure itself. Right after the procedure, avoid actions that cause irritation, and following the home care flow guided by the medical team helps with recovery.
Here is what to pay particular attention to in summer home care, organized by stage.
| Stage | Points to watch | Direction |
|---|---|---|
| Right after the procedure | Swelling, redness, heat sensation | Soothe with cooling and calming care |
| A few days into recovery | Strong UV exposure | Pay attention to UV protection |
| Ongoing care afterward | Repeated air conditioning and heat | Keep up moisturizing and barrier care consistently |
The procedure's effect and recovery speed vary with each person's skin condition, and the suitable home care method also differs from person to person. There are cases where people rely too much on the soothing and regenerative products applied after the procedure and end up missing the direction of care; you can look into this part together in an article organizing common misconceptions about regenerative cream. If any questions come up, we recommend confirming the direction that fits your own condition through a consultation with the medical team in charge.
What to look at when choosing a clinic in Sinnonhyeon
When choosing a Rejuran clinic, price and promotions are actually items you can look at last. What to check first is whether it's an environment where a procedure can be designed to suit your individual skin condition, and whether sufficient examination and consultation take place before the procedure. We recommend looking first at whether skin measurement or a one-on-one consultation with the medical team is available.
On the pain management side, how the numbing cream is applied and whether soothing care is provided after the procedure also become checkpoints. How comfortably the procedure proceeds carries over into satisfaction as well. If you'd like to look at the criteria for choosing a dermatology clinic more broadly, an article organizing how to view dermatology from the clinic's eyes will also be helpful.
Rejuran's effect and response differ depending on each person's skin condition, and whether the procedure applies to you is decided through examination and consultation with the medical team. If you're curious whether it suits you, press Get a consultation by chat and comfortably start by checking your skin condition.
Frequently asked questions
What skin concerns does Rejuran help with?
Rejuran is known as a procedure that, using the PDRN component, may help organize the skin's regenerative environment, restore a weakened barrier, and improve the moisture-holding capacity of the dermis. Those who experience summer oil-moisture imbalance, or sensitivity and breakouts from a weakened barrier, may consider it. That said, the degree and duration of the change you feel differ depending on each person's skin condition.
Is Rejuran pain very severe?
Because it's a procedure done with injections, some people feel the burden of pain. We try to reduce that burden by applying numbing cream thickly before the procedure to dull sensation. The degree of pain differs depending on each person's pain sensitivity and skin condition.
Can I return to daily life right after the procedure?
Temporary swelling, redness, pain, and bruising may appear at the injection sites. Doing soothing care such as cooling or LED right after the procedure can make the recovery process more comfortable. The recovery period and the point of return may differ depending on each person's skin condition, so we recommend confirming through a consultation with the medical team in charge.
How long does the effect last?
The degree and duration of the change you feel differ depending on each person's skin condition and lifestyle environment. To maintain it longer, keeping up home care and barrier care consistently after the procedure can help. We recommend confirming the specific duration to suit your individual condition through a consultation with the medical team.
What preparation is needed before the procedure?
The first step is confirming a composition that suits your own skin condition and the goal of the procedure through sufficient consultation with the medical team. Grasping the condition through methods such as AI skin measurement and then designing the direction can help you expect a result with high satisfaction. We recommend that whether the procedure applies to you be decided strictly through examination and consultation with the medical team.
Recovery and downtime
Because Rejuran is an injection-based procedure, temporary swelling, redness, a stinging sensation, or light bruising can appear at the injection sites. These reactions tend to settle within a few days, though the degree and duration differ from person to person depending on skin condition and pain sensitivity. Pairing soothing care such as cooling or LED right after the procedure can make recovery more comfortable, and it helps to avoid saunas and strong UV exposure for the first few days. We recommend confirming your return-to-routine timing through a consultation with the medical team in charge.
How the cost is structured
There is no single fixed number for Rejuran. The makeup of the cost varies with the skin condition confirmed through methods such as AI skin measurement, the scope and area treated, the number of sessions, and whether post-procedure soothing and home care are included. Even with the same Rejuran, the direction is tailored to skin type and goal, so rather than comparing price alone it helps to look at what a given package actually includes. We recommend receiving guidance on the cost that suits you after examination and consultation.
Notes for visiting from abroad
ON Clinic sits within easy walking reach of Sinnonhyeon and Gangnam stations, so it is straightforward to fit a visit into a trip to Korea. Booking ahead of your visit lets consultation and AI skin measurement proceed without waiting, and multilingual consultation is available if you would like to check your skin condition and ask questions before you arrive. Please feel free to confirm details such as scheduling and language support through a consultation.
Written by: Dr. Oh Seung-min (Representative Director of ON Clinic, graduate of Seoul National University College of Medicine, Academic Committee Chair of the Korean Academy of Laser, Dermatology and Trichology). Detailed credentials can be found at Meet the Medical Team. First published 2026-06-12 / Last reviewed 2026-07-09
This article is intended to provide general information, and the appropriate treatment and results may vary depending on individual conditions.
