When Does Rejuran Start to Show? Bumps, Weeks and Your Flight
Dr. Jong Seon Kim · Director, Gangnam HERA8 min read
On this page
With Rejuran, how long to see results is the question that decides your trip: will your skin look any different before you fly home?
Some of it, yes. The small injection bumps usually flatten within a day or two, and many people notice better-hydrated skin within two to three weeks. The change in texture and fine lines builds over a course of sessions and is usually judged one to three months after the first one.
Hello, I'm Dr. Jong Seon Kim, Director of Gangnam HERA Plastic Surgery Clinic in Seoul.
I sit on the boards of the Korean Society of Aesthetic Surgery and the International Petit Medical Society, and at HERA the doctor who consults with you is the one who injects you. We're registered with Korea's Ministry of Health and Welfare to treat international patients, and a medical interpreter for your language is with you at no extra charge, so your timing questions get answered in words you understand.
If your days in Seoul are already fixed, send your arrival and departure dates on WhatsApp with one daylight photo of the area that bothers you, and ask whether a single session or a full course fits between them. That's enough for a first message.
Book a consultation
Send us your question or a photo on WhatsApp and we will reply in English.
Why does Rejuran take weeks to show?
Rejuran is a polynucleotide injection made from purified salmon DNA fragments. It doesn't fill a line the way hyaluronic acid filler does. The fragments are thought to work as a signal and a scaffold for the skin's own repair, supporting the fibroblasts that make collagen and helping the skin hold water. That runs on the skin's schedule, and collagen remodeling is counted in weeks.
A systematic review of polynucleotides in esthetic medicine in the Journal of Cosmetic Dermatology found that the studies mostly used repeated sessions spaced weeks apart, and judged hydration, elasticity and fine lines over follow-up periods of weeks to months.
So the first glow you may see in week two or three is mostly hydration. The firmer, finer texture people hope for comes later. At HERA we offer Rejuran, Rejuran HB and Rejuran I, the version made for the eye area, and the full Rejuran guide covers how the three differ.
When I would not book Rejuran for this trip
Rejuran suits thin, dry or crepey skin, fine lines, enlarged pores and tired texture. A few situations make it a poor match, and it's better to hear that before you book than after.
- You have a wedding, a photo shoot or a big meeting within a week of the injection. The bumps and any bruising need that week.
- Your main concern is sagging along the jaw or jowls. Rejuran improves skin quality and does not lift tissue. A lifting treatment or a thread lift fits that better, and each has its own recovery, as the overview of Ultherapy side effects and downtime shows.
- You've lost volume in the cheeks or temples. That is a filler question.
- You have an active breakout, a cold sore or an infection where the needle would go, or you've had a laser or peel on that area in the last couple of weeks.
- You are pregnant or breastfeeding, or allergic to fish. Rejuran is salmon-derived, and these are general reasons to wait or skip it.
Say the skin under your eyes is thin and creased, and at home you were told filler there would look heavy. That is a reasonable case for Rejuran I. The trade-off is time: the under-eye area tends to bruise and stay puffy longer than the cheeks, so I'd want it done early in your stay, and I'd tell you plainly that most of the change will happen after you're home. The page on realistic Rejuran results around the eyes shows what that tends to look like.
What a Rejuran visit includes
Every treatment at HERA begins with a 1:1 consultation with the doctor who will treat you. We also have an EVE V MUSE AI skin analysis system. The scan takes about a minute and maps pores, dryness, pigment and lines, which helps when you have several concerns and only one trip to work on them. Numbing cream is commonly applied before skin booster injections, and the injections themselves are many small points across the area.
You get a written estimate before treatment, and the price is the same as for Korean patients. What moves that estimate for you is which Rejuran fits your skin, how many areas you treat, and how many sessions your dates allow. Deposit and payment method are settled after the consultation, so a booking message can be as short as your dates, the area, and a question about how the deposit works for your visit.
How do I know the product in the syringe is genuine?
In short, it's a reasonable thing to wonder when you're a long way from home. At HERA we use only genuine, approved products, and the sealed vial is opened in front of you, so you can read the label yourself before the needle goes in. Sterilization is strict and disposables are single-use.
The doctor who planned your session performs it personally. We don't rush through high volumes, and a treatment made of dozens of small injection points is not something I want to hurry.
What do day 1, day 3 and day 7 look like?
Put simply, this is the general pattern for cheek and full-face Rejuran. The under-eye area usually runs a day or two behind it.
| When | What you'll likely see | What it means for your trip |
|---|---|---|
| Treatment day | Small raised bumps at each point, pinpoint redness, sometimes a tiny bruise | Plan a quiet evening; skip alcohol and the sauna |
| Days 1–2 | Bumps mostly flattened; under-eye skin may still look puffy | Makeup is usually fine from the next day; sightseeing is fine |
| Day 3 | Redness mostly gone; any bruise turning yellow | Photos work with a little concealer |
| Day 7 | Small bruises have usually faded | A comfortable point to fly home |
| Weeks 2–4 | Skin often feels more hydrated | The usual window for a next session |
| Months 1–3 | Texture and fine lines judged after the course | Assessed at home, in your own mirror |
Before you fly
Avoid booking Rejuran the day before your flight. Fresh bumps under dry cabin air are uncomfortable, and if a bruise or swelling worries you, it helps to still be in the same city as the doctor who treated you. Treatment on day two of a seven-day stay leaves five days to settle.
One detail people miss when planning: we're closed on Sundays and public holidays, and Saturday hours end at 5 pm. If you land on a Saturday evening, Monday is your first possible treatment day, and on Mondays and Fridays we're open until 8 pm. The HERA homepage date planner lets you enter your arrival and departure dates, pick a treatment and see which days suit it.
If your flight is already booked, send that date on WhatsApp along with the area you want treated, and ask which day of your stay leaves the most room for settling. Mention if it's under the eyes, since that area needs the longest margin.
Book a consultation
Send us your question or a photo on WhatsApp and we will reply in English.
How many sessions, and how far apart?
For Rejuran, how long to see results comes down mostly to session spacing. Courses commonly run around three sessions, two to four weeks apart, because each session builds on the repair the previous one started. Squeezing two sessions into one week mostly adds bumps.
For a visitor, that leaves three workable shapes:
- One trip, one session. Expect a hydration change and a first look at how your skin responds. Texture may improve a little.
- A stay of three to four weeks. Two sessions can fit in Seoul, with the second one well before your flight.
- Two or three trips. Sessions months apart are a longer gap than most protocols use. The skin still responds, but the course takes longer to show its full effect.
What a finished course tends to look like in photos is covered in what realistic Rejuran results look like.
Bumps, bruising and lumps after you fly home
Risks and side effects to know
The usual temporary reactions are the injection bumps (one to two days, longer under the eyes), redness, tenderness, small bruises that can take up to about a week to fade, and mild swelling. Less often, a small firm spot lasts a couple of weeks before softening. Infection and allergic reactions are rare but possible. How long each of these lasts differs between people, and thin under-eye skin usually takes the longest.
Bruising is more likely if you take blood thinners, aspirin or fish oil. Don't stop anything prescribed without your own doctor's advice, but mention it at the consultation.
Once you're home, ordinary bumps and yellowing bruises need nothing. Increasing pain, heat, spreading redness or pus are different: see a doctor at home promptly and bring the product name from the vial label and your treatment date. You can also send a photo of the area to us on WhatsApp.
The treatment itself. If you want the clinical detail — who it suits, how a session runs, recovery and the honest limits — it is set out on our Rejuran page.
Visiting HERA in Gangnam
We're at 4F, 9 Seocho-daero 73-gil, Seocho-gu, Seoul, three minutes from Gangnam Station. Hours are 10:00–20:00 on Monday and Friday, 10:00–19:00 Tuesday to Thursday and 10:00–17:00 on Saturday, with lunch from 13:00 to 14:00. We're closed Sundays and public holidays. An English interpreter is there at every visit.
To start, send one photo of the skin you want to treat and your travel dates on WhatsApp, and ask whether your stay is long enough for the bumps to settle before you fly. You can ask before booking anything. When you arrive, I'll look first at how thin the skin is in that area and how it creases when you smile, because that decides which Rejuran we use and where the injection points go.
FAQ
Frequently asked questions
Q1Can I wear makeup the day after Rejuran?
Usually yes, from the next day, once the injection points have closed. Apply it gently and avoid pressing hard on any bump that hasn't flattened yet.Q2Does Rejuran HB show results faster than standard Rejuran?
Rejuran HB is also formulated with hyaluronic acid, so some people notice a hydrated feel a little sooner. The longer-term texture change still builds over weeks, as it does with the standard version.Q3Will a single session do anything at all?
Often it gives a noticeable change in hydration and a first sense of how your skin responds. Changes in fine lines and elasticity tend to need more than one session, which is why one session works best as a start, not a finished result.Q4Can I combine Rejuran with filler on the same trip?
It's possible when they treat different concerns, for example filler for lost volume and Rejuran for skin quality. Each adds its own swelling or bumps, so plan the combined downtime against your flight date and raise it at the consultation.Q5What if a small bump is still there two weeks later?
A small firm spot that is not painful, hot or red usually softens on its own over the following weeks. If it is getting bigger, hurts, or the skin over it changes color, see a doctor at home and send a photo on WhatsApp.
Real stories
What Our Patients Say
Videos posted by patients who came from abroad.
Is morning the best time for upper eyelid fillers? 🤔 Our doctor explains why the timing of your appointment can make a difference during your consultation. Watch until the end to learn why. ✨
@gnheraclinic_en
Can one thread lift improve both lifting and skin quality? 🤔 Our doctor explains how the key components of the Aptos Thread Lift work and what makes it different from traditional threads. Watch until the end to learn more. ✨
@gnheraclinic_en
Thinking about a thread lift? 🤔 Aptos is more than just a PDO thread. Our doctor explains what makes it different and why it's become a popular lifting option. Watch until the end to learn how it works. ✨
@gnheraclinic_en
Would you choose sedation for Ultherapy? 🤔 Our doctor shares why he personally wouldn't recommend it—even for his own family. Watch the full explanation before making your decision. ✨
@gnheraclinic_en
HIFU or RF — which one does your face actually need? They both lift your skin — but in completely different ways. Which one is right for your face? Explained by a Korean aesthetic doctor. Save this before getting a lifting treatment.
@gnheraclinic_en
Noticing drooping mouth corners after 40? A small change can make a big difference. Lip filler + corner Botox ✔ Restore lip volume ✔ Lift the mouth corners ✔ Brighter smile 📍Gangnam HERA Clinic – Seoul Korea Follow @gnheraclinic_en
@gnheraclinic_en
Re2O vs Rejuran Which skin booster is right for your skin? Korean aesthetic doctor explains the difference.
@gnheraclinic_en
HIFU = Hollow Cheeks? Depends on your face type. Slim faces + strong HIFU can cause volume loss. Customized treatment is key.
@gnheraclinic_en
Jaw Botox mistake? Here’s why some faces look “peanut-shaped.” Placement matters. Save this before your next appointment.
@gnheraclinic_en
Want a smaller-looking face? It’s about placement. Save this.
@gnheraclinic_en
One treatment I’d recommend for parents? You might be surprised.
@gnheraclinic_en
✨ Under-Eye Filler Correction & Re-Treatment ✨ Sometimes, filler isn’t about adding more — it’s about doing it properly and safely. In this case, the under-eye area required: ✔ Filler dissolving (hyaluronidase) ✔ Careful assessment of the depth and placement ✔ A natural re-treatment for a smoother result The tear trough is one of the most delicate areas of the face, so precision and experience truly matter. At Gangnam HERA Clinic in Seoul, we specialize in: 💎 Under-eye filler correction 💎 Tear trough rejuvenation 💎 Natural, balanced results (never overfilled) If you’re visiting Korea and looking for a trusted clinic in Gangnam, Seoul, we provide full English support for international patients. 📍Gangnam, Seoul 📩 DM us to book a consultation
@gnheraclinic_en
✨ Chin Filler for Facial Balance ✨ A small change can make a big difference — especially in your side profile. At Gangnam HERA Clinic in Seoul, chin filler is designed to: ✔ Improve facial harmony ✔ Enhance the jawline naturally ✔ Create a softer V-line effect ✔ Support a more defined profile (without surgery) Our treatments are doctor-performed, highly precise, and always tailored to your unique facial structure. If you’re looking for natural chin filler in Gangnam, Seoul, we offer full English support for international patients. 📍Gangnam, Seoul 📩 DM us for consultation & booking
@gnheraclinic_en
✨ Natural Lip Filler in Seoul (Gangnam) ✨ Subtle, balanced, and beautifully tailored to your facial features. At Gangnam HERA Clinic, our lip filler treatments focus on: 💗 Soft volume (not overdone) 💗 Better lip symmetry 💗 A more youthful, refreshed look 💗 Doctor-performed, precision-based results If you’re visiting Korea and looking for a trusted clinic in Gangnam, Seoul, we provide full English support for international patients. 📍Located in Gangnam, Seoul 📩 DM us to book your consultation
@gnheraclinic_en
Restore Your Youth: The Magic of Hand Fillers ✨✋ Do you find yourself hiding your hands because of visible veins, tendons, or wrinkled skin? As we age, we lose volume in our hands, making them look older than we feel. But you don't have to let your hands give away your age! At Gangnam HERA, we provide a professional solution to restore that smooth, youthful look: ✅ Volume Restoration: Fills in hollow areas where fat has been lost. ✅ Vein & Tendon Camouflage : Softens the appearance of protruding vessels for a softer look. ✅ Smooth Texture : Deeply plumps the skin to reduce the "wrinkled" appearance. Experience an instant rejuvenation with natural-looking results. Let your hands match your youthful glow! 💎
@gnheraclinic_en
The Secret to "Soft Tofu" Skin? Only at Gangnam HERA! 🥛✨ Ever heard of the "Soft Tofu" Skin Booster? Just like the name suggests, it’s the ultimate secret to achieving a bouncy, bright, and milky-white complexion. The star ingredient is Glyju, a revolutionary booster made from Glyceollin (soybean-derived) ✅ Powerful Whitening: Blocks melanin synthesis for a clearer skin tone. ✅ Vascular Health: Promotes skin regeneration and healthy glow. ✅ Instant Hydration: Packed with Hyaluronic Acid to erase dryness. Why Gangnam HERA? 🤫 Glyju is amazing on its own, but we do it differently. At HERA, we combine it with an exclusive secondary treatment that boosts the results by 200%. This unique "Secret Formula" is available only at our clinic, giving you that signature whitening glow you can't find anywhere else. Ready for your Soft Tofu transformation? Experience the newest trend in Gangnam! 💎
@gnheraclinic_en
Juvelook I + EBD The Perfect Synergy 💉⚡️ Why combine Juvelook I with Energy-Based Devices (EBD)? Because they work better together! Juvelook I: Stimulates deep collagen production. EBD : Tightens skin tissue using thermal energy. At Gangnam HERA, we provide both to give you volume and lifting at the same time. 🕒 Already had Juvelook? We recommend a 2–3 week interval for absorption before starting your device treatment.
@gnheraclinic_en
I asked AI (Gemini 3.0) about the future of lips, and the answer was clear: Be Yourself. ✨ 🎬 2026 Lip Trends (Quick Summary) 1️⃣ Beyond Volume 👄 Less is More! It’s all about a natural, healthy glow over fake volume. 2️⃣ Hybrid Care 💧 Filler + Skin Booster (Rejuran/Exosome). Shape with filler, hydrate with boosters. 3️⃣ Advanced Safety 🛡️ New materials, longer results, and fewer side effects. (P.S. I asked Gemini how old it is, and it said it doesn’t age... Must be nice! But for us humans, we have Gangnam HERA to keep us youthful! 😂) 📍 Visit us in Gangnam for your 2026 personalized lip design.
@gnheraclinic_en
Stop guessing! Here is the REAL difference between Rejuran i and Juvelook i. 👇 ✅ Rejuran i Hydration & Glow. Perfect for fixing dry, "crepey" skin and adding that healthy inner radiance. ✅ Juvelook i Natural Volume. Perfect for filling hollow tear troughs by boosting your natural collagen. No bumps, just smooth skin. One heals the skin, the other fills the hollows. Which one is your concern? Tell us in the comments! 💬
@gnheraclinic_en
Say goodbye to vertical neck wrinkles—WITHOUT surgery! 🙅♀️✨ Vertical neck lines used to be the hardest to treat, often needing a surgical neck lift. But the trend has changed. Now introducing the CaHA Skin Booster treatment! 💉 By spreading diluted calcium filler evenly under the vertical folds, we stimulate your skin to regain its firmness and bounce naturally. Perfect for ✅ Loss of skin elasticity ✅ Deep vertical neck bands ✅ Those wanting surgical results without the downtime The future of neck rejuvenation is here at Gangnam HERA. 🤍
@gnheraclinic_en
Even without lifting, your look can change this much. By adding only the necessary amount of filler to the temples, lateral cheeks, and chin, and combining chin Botox with Juvelook Eye, we refined the overall balance. Not to look unnaturally younger, but natural and smooth. This is a case that shows how much of a difference filler alone can make. 📩 For consultations and appointments, please contact us via DM or WhatsApp. * Results may vary by individual.
@gnheraclinic_en
As we enter our 40s, many people start to notice: ✔️ Looser facial contours ✔️ A double chin ✔️ Deeper neck lines Improvement isn’t only about “lifting.” By reducing excess volume, refining the contours, and adding volume only where needed, the overall appearance can change significantly. This case combines: Ultherapy, fat-dissolving injections, Botox, and filler. Not to look unnaturally younger, but to look natural, clean, and refined. We offer facial contouring tailored for your 40s, with a balanced and thoughtful approach. For inquiries and appointments, please contact us via DM or WhatsApp.
@gnheraclinic_en
A special New Year message from the doctors at HERA. 💌 May your 2026 be as bright and glowing as the skin you’ve always dreamed of. We are so grateful to be part of your beauty journey. Stop the screen to reveal the blessing waiting for you! 🧧✨ Wishing you a year of overflowing happiness and health. Happy New Year! 🎊
@gnheraclinic_en
Body Ultherapy? 👀 Meet Sizer. 📢FDA-approved for belly fat reduction. Goes deeper. Works better. Sizer + fat-dissolving injections = 🔥
@gnheraclinic_en
On YouTube
Hear it from the doctors before you fly
Our doctors explain HERA's main treatments, lifting, filler and skin boosters, on camera, so you know who you are meeting and how they think before you land in Seoul.
Korean audio · auto-translated captions available on YouTube
16 videos
- 6:24Filler
Dr. Kim and Dr. Lee sort out how fillers, collagen injections and skin boosters differ, and which concern each one is for.
Dr. Jong · Dr. Jong - 7:36Clinic & doctors
HERA podcast ep. 3 — Dr. Kim and Dr. Lee look at the same face and explain the treatments they would choose, and why.
Dr. Jong · Dr. Jong - 8:07Lifting
What APTOS threads are, who they are recommended for, and a real patient's treatment and before-and-after.
Dr. Jong - 5:44Lifting
How APTOS compares with other lifting threads, what recovery is like and how long results last.
Dr. Jong · Dr. Jong - 4:20Filler
Dr. Kim shows how injection technique changes with the amount of filler, and how filler dissolves.
Dr. Jong - 5:50Filler
What a hollow upper eyelid is, filler vs fat grafting, how long it lasts and what to watch for.
Dr. Jong - 5:20Filler
Dr. Kim breaks down lip proportion, volume and mouth corners using well-known Korean celebrities' lips as examples.
Dr. Jong - 5:39Skin & boosters
Hydration, pores, breakouts or tone — matching the skin booster to what your skin actually needs.
Dr. Jong - 6:05Skin & boosters
Dr. Lee explains how Lituo and CaHA work, how they are injected and how often.
Dr. Jong - 5:00Skin & boosters
What Juvelook Eye is, what it is used for, how many sessions it takes and how long it lasts.
Dr. Jong - 5:56Lifting
Why lines form around the eyes, which treatments are combined, and Eye Thermage vs Eye Ulthera.
Dr. Jong - 4:58Lifting
Why Dr. Lee cares about lifting, and what he looks at first when he sees a patient.
Dr. Jong - 3:30Clinic & doctors
Dr. Han talks about what matters most in a consultation and the approach behind every treatment.
Dr. Jin - 5:29Skin & boosters
A tour of HERA's main devices and which skin concern — pores, texture or firmness — each one helps with.
Dr. Jong - 4:40Clinic & doctors
Three areas brides care about, recommended treatments, and what still works with a month to go.
Dr. Jong · Dr. Jong - 4:39Clinic & doctors
What an AI skin scan measures — wrinkles, pigment, firmness, pores — and why a doctor's consultation still matters.
Dr. Jong · Dr. Jong
Shorts
One question, under a minute
HERA TV
The doctors explain it on camera — then in writing
Each piece is written by the doctor from their own YouTube video: the patient question, why it happens and how we approach it.
6:24korean plla fillerKorean PLLA Filler? Filler vs Collagen Booster vs Skin Booster
Is PLLA a filler? Two Gangnam HERA doctors sort out the three injectable families that confuse most patients — filler, collagen boosters and skin boosters — and how to combine them by area.
Dr. Jong Seon Kim7 min read
4:21neck line fillerNeck Line Filler: One Treatment, Start to Follow-Up
A Gangnam plastic surgeon treats a young patient's two neck lines on camera — why the lines form, why they are filled slightly high at first, how much it hurts, and what the follow-up visit showed.
Dr. Jin Yi Han6 min read
5:39korean skin boosterKorean Skin Booster: How to Choose by Your Skin's Main Problem
There are so many Korean skin boosters that patients freeze. A Gangnam doctor sorts them by the four problems that matter — hydration, pores, inflammation and brightness — and names the one he would pick if he could only choose one.
Dr. Jong Seon Kim7 min read
HERA Journal
Keep reading
Skin boostersHow Long Does Rejuran Take? Chair Time, Bumps and Trip Days
A Rejuran visit usually takes half a day at most, and the small injection bumps typically flatten within one to three days. The full course takes longer: sessions are spaced two to four weeks apart.
8 minRead →
Skin boostersHow Long Does Rejuran Last? Months, Sessions and Trip Days
After a course of about three sessions spaced weeks apart, Rejuran's effect commonly holds for six months to a year. The bumps settle in one to three days, so session spacing shapes your trip more than downtime.
8 minRead →
Skin boostersRejuran Recovery Day by Day: Bumps, Bruises and Your Flight
Most people see Rejuran bumps flatten within about a day and redness fade in one to two days; a bruise can take up to a week. Keep two to three days in Seoul after the injection.
8 minRead →
Visit us
Find Gangnam HERA
In Seocho-gu, Seoul, a three-minute walk from Gangnam Station Exit 9. Tap the map for directions.
Address
4F, 9 Seocho-daero 73-gil, Seocho-gu, Seoul, Republic of Korea
Opening Hours
Tuesday, Wednesday, and Thursday: 10:00 AM – 7:00 PM; Monday, Friday: 10:00 AM – 8:00 PM; Saturday: 10:00 AM – 5:00 PM; Lunch break: 1:00 PM – 2:00 PM; Closed on Sundays and public holidays
