How Long Do Rejuran Bumps Last? Timing Your Session and Flight

Is a Rejuran session two days before your flight home cutting it too close, and with Rejuran bumps how long should you really leave?

The small raised bumps from the injections usually flatten within a few hours to a day, and by the second morning most faces look close to normal. Bruising is the slower part. A pinpoint bruise can take about a week to fade, so I'd plan for two clear days between the session and the flight.

Hello, I'm Dr. Hongseok Kim, a board-certified dermatologist with 21 years of experience and Medical Director of VOS Dermatology Clinic in Gangnam.

I do the consultation and the injections myself, so the person deciding how much product goes into each point is the one holding the needle. If needles are the part you dread, nitrous-oxide sedation is available here and has been used in more than 5,700 cases. We're also open Saturdays from 10:00 to 16:00, which helps if you land late in the week.

The consult on WhatsApp is free. Send one front-facing photo taken in daylight with your arrival and departure dates, and ask which day of your trip leaves the bumps enough room before you fly.

Why do Rejuran bumps form at all?

Rejuran is a polynucleotide (PN) gel. It goes into the upper dermis as many tiny deposits, each a fraction of a drop, spaced across the cheek. Every deposit lifts the skin above it like a small blister with no fluid inside, and that is the bump you see in the mirror afterwards.

Risks and side effects to know

The bumps are the product sitting where it is meant to work. PN is a thicker gel than most hyaluronic acid boosters, so it takes longer to spread into the surrounding tissue, and until it does, each point stays visible. A little local swelling from the needle adds to it for the first few hours. Results vary by person.

The type matters a little. Rejuran Healer is pure PN and suits sensitive, reddened skin with a weakened barrier. Rejuran HB combines PN with hyaluronic acid and lidocaine, which makes the session more comfortable. Rejuran Eye is made for the thin skin under the eyes, where any swelling tends to show more. If you want the options side by side, I've laid out the Rejuran types and how sessions are spaced in a separate note.

How long Rejuran bumps last, hour by hour

The table below is my general answer on Rejuran bumps how long they stay at each stage, for cheeks treated with Healer or HB. Under-eye treatment can run a little slower.

Two things in that table matter more than the hours. First, bumps and bruises run on different clocks. Bumps depend on how fast the gel spreads; bruises depend on whether the needle nicked a tiny vessel, which nobody can fully predict.

Second, the next morning is your checkpoint. If the bumps are mostly down by breakfast on day one, they are very rarely an issue by day two. If they're still clearly raised, that usually points to one of the factors below, and it tells you to keep the next evening quiet too.

What makes bumps last longer than a day?

A few things stretch the timeline, and most of them are known before the needle goes in.

• Thin skin. Under the eyes and on very fine cheek skin, each deposit shows more and the swelling settles more slowly.
• The amount placed in one session. More product across more points means more bumps to absorb. A bigger area, such as face and neck on the same day, adds time.
• Bruising tendency. Fish oil, vitamin E, ginkgo, aspirin and prescribed blood thinners all make bruising more likely. Never stop a prescribed medicine on your own; tell me about it instead.
• Heat and alcohol that first evening. A sauna, a hard workout or a few drinks send more blood to the face and can keep swelling up longer.
• Rubbing and pressing. Massaging the bumps to make them go down faster tends to irritate the skin more than it helps.

Say you're 52, flying home on Monday morning, with thin cheek skin that flushes easily and a daily fish-oil capsule. I would put the session on Friday, not Saturday, and suggest Rejuran Healer at an amount suited to your cheeks instead of adding the neck on the same day. You'd lose nothing by doing it this way, and you'd gain an extra morning to see how your skin settles before packing.

How I approach Rejuran when your flight is a few days away

My starting point is the dose. My commitment for every injectable is exact dosage and concentration, never more and never less than your skin needs, and that matters for travel too. Extra product doesn't make Rejuran work faster, though it does give you more bumps to wait out.

The syringe matters as well. We use a 5μm ultra-fine filter syringe, which blocks micro-particles such as ampoule glass fragments, and genuine product is one of the clinic's three principles. I mention these because a reaction that lingers is far more worrying than a bump that fades by morning, and those two choices reduce the part I can control.

Then there's the choice between Healer, HB and Eye. If your skin is reactive, Healer usually comes first. If you mainly want the injections to feel easier, HB's lidocaine helps. If your concern is fine lines under the eyes, the Eye formula fits, but I'd want more days before a flight for that area.

Worth knowing: Two habits common on a Seoul trip work against you on session night: the jjimjilbang and Korean barbecue with soju. Save both for the evening before your session. And a disposable mask on the flight home is so ordinary in Korea that nobody will look twice at a faint bruise on your cheek.

Which day of your trip should the session go on?

Count backwards from the flight. The clinic is open Monday, Tuesday and Thursday from 10:00 to 19:00, Friday until 20:00 and Saturday until 16:00, and closed on Wednesday, Sunday and public holidays.

For a Monday flight, a Friday or Saturday session gives you two to three mornings of margin. For a Thursday flight, Monday or Tuesday works, since Wednesday is closed anyway. If you arrive on a long overnight flight, I'd avoid the session on arrival day. You'll be tired, your face may already be puffy from the cabin, and it becomes harder to tell travel swelling from treatment swelling.

Rejuran usually works as a series, so one trip rarely covers the whole course. If you're fitting a single session into a few days, my notes on planning Rejuran around a short trip cover what one visit can and can't do. If Rejuran is one part of a wider plan for brighter skin, my view on glowing skin, Korean style explains where boosters fit. And the type, the amount and the number of sessions are what move the cost of Rejuran for your case.

If you already know your flight time, send it on WhatsApp with a list of the supplements and medicines you take, and ask whether your planned session day leaves enough margin.

What if a bump or bruise is still there after you fly home?

Most reactions are temporary: raised bumps, redness, pinpoint bleeding marks, mild tenderness and sometimes a bruise. Results and recovery differ between people, so read the timeline above as the usual course. A systematic review of polynucleotides in esthetic medicine in the Journal of Cosmetic Dermatology reported side effects that were mostly mild, short-lived injection-site reactions, and a real-life assessment of high-purification polynucleotides in the same journal described a similar picture.

Some people should wait or skip it for now:

• active acne, infection or inflammation where the injections would go
• a recent laser or peel on the same area
• recent isotretinoin
• pregnancy or breastfeeding
• an allergy to fish or salmon, since Rejuran's PN is derived from salmon

A bump that stays firm beyond a week, or skin that becomes warmer, more swollen or more painful over the days instead of less, is a reason to see a doctor at home promptly. Spreading redness with pain can point to infection, which needs care in person. Keep the date, the product name and the treated areas from your session, and take them to that appointment. You can also send a photo of the area on WhatsApp with your session date and ask whether what you're seeing fits the normal course.

Before you message us

The consult on WhatsApp is free, and one photo is enough to start. Take it facing a window in daylight, without makeup, and add your arrival and departure dates plus any supplements or medicines you take. If you'd rather talk in a language other than English, a medical interpreter is provided at no extra charge. The deposit and payment method are settled after the consultation, so ask about those in the same message.

When you're here, I look first at how thin the skin is over your cheeks and under your eyes, because that tells me how visible the bumps will be and how much product each point should carry.

Then message us on WhatsApp with the one question that matters for your trip: which day should my session go on so the bumps and any bruise have settled before my flight?

Results, timing and recovery vary from person to person. This article is general information from VOS Dermatology Clinic and does not replace an in-person consultation. Any prices mentioned are from the clinic’s official price list (KRW, before VAT) and may change.