Skin boosters
Rejuran injection how long does it last, and how many Seoul days to plan?
Rejuran lasts by the course, not the single shot, and that sets how many Seoul days you need. We answer WhatsApp within 24 business hours, so you can plan it before booking flights.
Written and medically reviewed by Dr. Jang Dong-hoon · Founder & Medical Director
Published · 10 min read
Before you spend a week of leave and a long flight on it, what is the real answer to “rejuran injection how long does it last” for skin like yours, in your fifties or sixties?
If you are deciding between one Seoul trip and a plan that brings you back, the day-by-day table in the second section is the part to hold up against your calendar.
What follows covers how long a course usually holds, what each day after the injections looks like, which method suits your skin, what reviews get right and wrong, and what moves the cost. Together they tell you how many days to book and whether one visit is enough.
Hello, I'm Dr. Jang Dong-hoon, Founder & Medical Director of THE Beautiful Clinic in Seoul.
I consult, plan and treat, so your plan isn't handed to a counsellor with a package to sell. Every consultation begins with a 3D skin scan rather than a price list, and you can message us in English on WhatsApp; the clinic answers within 24 business hours.
Most people ask how long a single injection lasts, when the length of the result comes mainly from the course and from how the skin is looked after afterwards.
After a full course, the improvement from Rejuran is commonly described as holding for around 6 to 12 months before a maintenance session; one session alone tends to fade sooner. The small bumps from the injections themselves usually flatten within a day or two.
If you want to see where your own skin sits on that timeline, send one daylight photo of your cheeks without makeup, plus your Seoul dates, on WhatsApp. Ask one thing: does my trip fit one session or the start of a course? A photo and two dates are enough for a first message, and you can ask before booking anything.
How long does a Rejuran course last once it's finished?
Rejuran is a polynucleotide (PN) injection: purified DNA fragments derived from salmon, placed in tiny amounts across the skin. It adds almost no volume, which is why it isn't a filler. Its work is slower: supporting hydration and the fibroblasts that rebuild collagen. A review in Pharmaceutics comparing PN with PDRN describes the longer PN chains as able to form a hydrating, scaffold-like network in the tissue, which helps explain why the effect builds over weeks instead of appearing overnight.
That's why “rejuran injection how long does it last” has two answers: around 6 to 12 months after a course, and shorter after a single session. The slow build also means a slow fade. Nothing switches off on a set date; the skin drifts back toward where it started over months. A systematic review of polynucleotide studies in the Journal of Cosmetic Dermatology pooled trials with different session counts and follow-up lengths, so no single figure fits every face.
What shortens the result, in general:
- unprotected sun exposure, a large everyday factor
- smoking
- thin, dry or heavily sun-damaged skin
- one session instead of a course
What lengthens it is the reverse: a full course, daily sunscreen, and a maintenance session before the change has fully faded.
When I read a 3D scan, I am not only looking for fine creping. I want to know how thin the skin is and how much sun damage sits below the surface. A thin, sun-marked cheek at 58 usually needs a course and a plan for maintenance. A 44-year-old with mild dullness may need less, and I would say so.
Your recovery day by day, and what it means for trip length
| When | What you may notice | What it means for your trip |
|---|---|---|
| Same day | Small raised bumps at each injection point, pinpoint marks, some redness | Keep that evening clear of photos and dinners |
| Day 1 to 2 | Bumps flatten for many people; light makeup is usually fine by now | Flying is fine; bumps may still show up close |
| Day 3 to 7 | Any bruise fades from purple to yellow | Leave this margin before a wedding or work event |
| Weeks 2 to 4 | Little visible change; some people notice their skin feels more hydrated | The usual window for the next session of a course |
| Months 1 to 3 | Texture and fine lines change as collagen builds | Judge the result here, not at the airport |
The table shows general patterns; how quickly your own bumps settle is something to watch rather than assume.
For a trip, two facts matter. First, skin boosters like Rejuran can usually be done straight after the consultation, so the scan and the first session can fall on the same visit. Second, sessions in a course are normally spaced a few weeks apart, so a 7 to 10 day stay fits one session; a whole course needs several visits. The clinic is open Monday to Thursday 10:30 to 19:30, Friday until 20:30 and Saturday 10:30 to 16:30, and closed on Sundays and public holidays. The THE Beautiful Clinic English site has the address, a 2-minute walk from Nonhyeon Station Exit 5.
Say you're 56, flying in from Vancouver for ten days, with fine creping on the cheeks and under the eyes. I would suggest coming early in the trip, on a weekday, so the bumps are long gone by the flight home and you still have days in hand if a bruise appears. You would leave with one session done. The real decision is about session two: whether you come back in a few weeks, or carry on the course with a doctor near home. Both are reasonable, and the second needs good records, which I cover below. If you want the clinic visit itself laid out, the Rejuran Healer procedure steps in order walk through it.
If your dates are already fixed, put them in a WhatsApp message with a line about any filler, laser or threads you've had in the last six months. Then ask which day of your stay leaves the most room before your flight.
Which Rejuran method fits your skin, and does it change how long it lasts?
We offer four forms of Rejuran:
- Rejuran, the standard version, for the cheeks, forehead and jawline skin
- Rejuran i, the eye version, for the thin skin under and around the eyes
- Rejuran HB, a low-pain type, if needles are what worry you most
- Rejuran with Dermashine, where the product is delivered with a device instead of by hand
I don't choose between them for duration. In my view, the length of the result follows the course and your skin more than the version. I choose by area, and by how much discomfort you're willing to sit through; if that second point is your main concern, does Rejuran injection hurt covers what it feels like and when waiting makes sense. The forms are also listed on our Rejuran treatment page.
The under-eye area has some of the thinnest skin on the face. Smaller volumes go there, and a bruise shows more, so if the eye version is part of your plan, give it the full week's margin from the table before any event.
What do reviews say about how long Rejuran lasts?
If you searched “rejuran injection how long does it last” after reading forum threads, you have probably met three claims.
“My skin glowed for a week and then it was gone.” Partly true. The early change is mostly hydration and the settling of the bumps. The collagen change comes later, so judging Rejuran at one week measures the wrong thing.
“One shot lasted me a whole year.” Possible to feel, but it isn't what to plan on. Published studies test courses, and one session on its own generally fades sooner.
“The bumps lasted a week.” True for some people. Most bumps flatten in a day or two; a bruise, or product placed very close to the surface, can take longer. That is the reason for a margin before an event.
For a second angle on the same question, how long Rejuran Healer lasts goes through recovery by day, and Rejuran duration planned around your Seoul days looks at fitting sessions into a stay.
What decides the cost of Rejuran for your case?
The consultation starts with the scan, not a price list, because the plan sets the cost. These are the factors that move it:
- Volume per session: one or two cc, depending on the area treated
- Version: standard, eye, or the low-pain type
- Delivery: by hand or with the Dermashine device
- Number of sessions: one on this trip, or a course across visits
- Any other treatment in the same visit, if the scan points to one
Ask on WhatsApp what your own plan would cost, with one daylight photo and the areas you care about.
Risks and side effects to know
Common and temporary: bumps for a day or two, redness, tenderness, and bruising that can take up to a week to fade. Less commonly, a small firm spot can be felt for longer and usually softens.
Who should wait or skip it, as general medicine:
- infection, active acne or inflammation where the injections would go
- a recent laser or peel on the same area
- isotretinoin taken now or recently
- pregnancy or breastfeeding
- allergy to fish or salmon-derived ingredients, since PN comes from salmon
- blood thinners or a bleeding tendency; tell the doctor, as bruising is more likely
How skin responds differs between people, so treat every timing in this post as a typical pattern.
If something appears after you fly home, a cool compress and patience help ordinary bumps and bruises. A spot that turns hot, increasingly painful, swollen or red, or any fever, needs a doctor near you promptly. Keep a note of the product, version, volume, areas and date so that doctor knows exactly what was injected, and send a photo to us on WhatsApp as well.
Keeping the result after you fly home
Daily sunscreen does more for how long Rejuran lasts than anything else you control, because sun exposure keeps breaking down the collagen the injections asked your skin to build. Many doctors also suggest skipping sauna, heavy exercise and alcohol for a day or two after injections.
Plan the next session before the change has faded. If you will continue at home, take the record above to your dermatologist. If you will come back, the spacing of a course gives you a natural point to book the next trip.
If session two is the question you're stuck on, write it in your WhatsApp message with the month you could return, and add your home city if you'd rather continue the course there.
On the day, the 3D scan is where I start: how thin the skin under your eyes is and how much sun damage sits in your cheeks decide between one session now and a planned course. To begin, a single photo is enough.
The short version
- A Rejuran course is commonly described as holding for about 6 to 12 months; one session alone fades sooner.
- Injection bumps usually flatten in a day or two; a bruise can take up to a week.
- Sessions in a course are spaced weeks apart, so a 7 to 10 day trip fits one session.
- Daily sunscreen and a planned maintenance session matter more for duration than the version you choose.
Questions patients ask
Does the eye version of Rejuran last as long as the face version?
There is no reliable separate figure for the eye area. The skin there is thinner and moves all day, and smaller volumes are used, so the maintenance rhythm under the eyes is usually reviewed on its own rather than assumed to match the cheeks.
Can I fly home the day after Rejuran?
For most people, yes. Cabin pressure doesn't affect the product. The question is appearance: on day 1 the bumps may still show up close, so a next-morning flight is fine for travel but less ideal if someone is meeting you at arrivals with a camera.
What happens if I stop after one session?
The skin gradually drifts back toward where it started over the following months. Stopping does not cause a rebound that leaves the skin worse than before treatment.
Can I have a laser on the same Seoul trip as Rejuran?
Often, yes, and the order matters. Mention any laser or peel you are considering, and avoid sun exposure and retinoids for a few days before laser work.
Can a dermatologist at home continue my Rejuran course?
Yes, if the product is available where you live. It isn't approved in every country, so check before planning the rest of the course around home, and take the product name, version, volume per area and date of each session with you.
Does starting Rejuran younger make it last longer?
Starting earlier doesn't lengthen one session's result. What changes with age is how much the skin has to rebuild, which is why someone in their fifties more often needs a full course and maintenance.
Results and recovery vary between individuals, and every treatment can have side effects. Prices are from the clinic's price list and are confirmed at consultation. This article is general information, not a diagnosis.
Sources
About the author
Dr. Jang Dong-hoon
Founder & Medical Director
Founder and medical director of THE Beautiful Clinic in Nonhyeon, Gangnam. He sees every patient's skin analysis before a plan is drawn, and reviews every article on this blog against what the clinic actually does.
Credentials in full
