How Long Does Rejuran Take to Heal? Bumps, Bruises, Home Care

Your skin bruises easily and stays red for days after most treatments at home, so with Rejuran how long to heal is what sets your whole trip: will the marks be gone before you board the flight home?

The raised bumps usually flatten within one to three days, and pinpoint redness fades in about the same time. Bruises are the slow part: one can take one to two weeks to clear, so on bruise-prone skin, book the session early in your stay, not the day before you fly.

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

I do the consultation and every injection myself, and VOS recorded more than 50,000 cases between January 2023 and April 2026. On thin, reactive skin, the variable I watch is depth and the number of needle passes near the small vessels, because that is where bruises come from. A medical interpreter for your language is available at no extra charge, and the consult on WhatsApp in English is free.

If you're not sure how many days to leave, send one daylight photo of the area that worries you and your flight-home date on WhatsApp, and ask whether that margin is enough for your skin.

What actually heals after Rejuran, and in what order?

Rejuran is a polynucleotide (PN) injection, made from purified DNA fragments of salmon origin. Healer, HB and Eye are the three types on our menu. Each is placed into the dermis as many tiny deposits, and what you see afterwards is four separate things healing on four separate clocks.

The first is the blebs. Each deposit lifts the skin into a small dome, so the treated area looks like a grid of mosquito bites for the evening. The liquid spreads into the surrounding tissue and the domes flatten, usually within one to three days.

The second is the needle points themselves. These close within hours, which is why most aftercare advice is about the first 24 hours.

Risks and side effects to know

The third is redness and swelling, the skin's ordinary response to dozens of small punctures. On the cheeks it tends to settle with the bumps. On the lips and under the eyes, where the skin is thinner and looser, swelling shows more and can take a little longer.

The fourth is bruising, which only happens where a needle met a small blood vessel. It is the mark that decides flight dates, and it catches people out: a bruise is often faint on the evening of the session and clearest on day two or three, as the blood spreads and surfaces. So a clean mirror on night one is not the all-clear. It then moves from purple to green to yellow and fades over one to two weeks.

A systematic review of polynucleotide studies in the Journal of Cosmetic Dermatology describes the reported side effects as mostly mild and temporary, such as redness, swelling and bruising at the injection points. For a traveler, that means the downtime is about visible marks, not about pain or being unable to walk around the city.

How many days should I leave before flying?

For the bumps alone, two days is usually enough. If you bruise easily or are having the eye or lip area treated, leave four to five days between the session and the flight, so the worst of any bruise shows while you are still in Seoul.

Put the answer to Rejuran how long to heal against a calendar and it looks like this:

Flying does not slow healing. Cabin air is dry, so the skin may feel tight, but pressure changes do nothing to the injected material.

Say you land on a Thursday night and fly home the following Tuesday. Friday is the day to book: the clinic is open until 20:00 on Fridays and until 16:00 on Saturdays, and it is closed on Sundays and Wednesdays. A Friday session gives you four mornings to see how your skin settles before the flight. A Monday session gives you one, and if a bruise is coming, you will see it at the departure gate instead of in your hotel mirror.

If your whole stay is a long weekend, I've gone through what fits and what doesn't in Rejuran on a short trip to Korea.

Why does my skin take longer than other people's?

Healing speed is mostly decided before the needle goes in. These are the things that push you toward the slow end of the table:

• Thin skin over the area. Under-eye skin, and the skin over the cheekbones in slim faces, sits close to small vessels, so bruises are more likely.
• Reactive or rosacea-prone skin. Skin that flushes easily often stays pink longer after any injection, even when there is no bruise.
• Anything that thins the blood. Fish oil, vitamin E, ginkgo and pain relievers such as aspirin or ibuprofen make bruising more likely. Alcohol the night before does the same.
• Heat in the first day. A sauna, a hot bath or a hard workout on the evening of the session keeps the area flushed for longer.
• The area treated. Lips swell more visibly than cheeks. If the lips or the area around the mouth are part of your plan, I've written about healing days with Rejuran HB Plus after 40.

If you were told at home that your skin is too reactive for injections, take that seriously, and know that it doesn't always mean no. Often it means the timing, the area and the number of entry points need more thought than usual.

How I approach Rejuran on skin that bruises or flares

Every plan at VOS starts with my skin analysis, and I choose what goes where for your face instead of applying a fixed package. On bruise-prone skin, the trade I weigh is coverage against marks: more injection points spread the material evenly, but each one is another chance to meet a vessel. I'd rather adjust the pattern for your skin than send you home with a week of bruises.

I also hold to exact dosing for every injectable, never more and never less than the skin needs. Extra volume does not make Rejuran work faster, and on thin skin it makes the bumps larger and slower to settle. We use genuine products only, which is a safety matter as much as a matter of results.

If your cheeks are in an active flare when you arrive, I would rather wait than inject into inflamed skin. That can mean moving the session to later in your stay, or to your next trip. If the needles themselves are the hard part for you, nitrous-oxide sedation is available; VOS has used it in more than 5,700 cases.

Doctor's note

Before asking how fast you'll heal, look at what's on your calendar in the ten days after the session. A wedding photo on day four changes my plan more than your skin type does. Tell me that date first.

Bruises, lumps and infection: what's normal and what isn't

Normal, temporary reactions are small bumps for one to three days, pinpoint redness, mild tenderness when you touch the area, and occasionally a bruise that takes one to two weeks to fade. Healing and results vary by person, and the in-person exam is where I judge whether your skin is ready on the day.

As general medical guidance, it is wiser to wait or skip Rejuran if you have:

• an active infection, acne flare, cold sore or open wound in the area
• had a laser, peel or other procedure on the same area in the last two weeks
• taken isotretinoin recently
• a pregnancy, or you are breastfeeding
• a known allergy to fish or salmon, since PN is derived from salmon
• an active rosacea or eczema flare on the skin to be treated

Things that are not normal after you are home: pain that gets worse instead of better, warmth or redness that spreads after day three, pus, fever, or a firm lump that grows. These need a doctor near you the same day. Before you leave the clinic, note the product name and the treated areas, so the doctor at home knows what was used. For questions that aren't urgent, you can send a photo on WhatsApp; Dr. Kim's team replies in English.

If you've reacted badly to an injection before, send a photo of what that reaction looked like, the product name if you know it, and your dates on WhatsApp, and ask whether your skin needs a longer gap before the flight.

What should I do once I'm home?

Most aftercare is about the first 48 hours, which for many visitors means the flight and the first day back.

• Skip makeup until the next day, so the needle points can close.
• Don't press, massage or rub the area; sleep face up the first night if you can.
• Avoid saunas, hot baths, hard workouts and alcohol for the first 24 hours.
• If a bruise appears, a cold pack wrapped in cloth for ten minutes at a time in the first 48 hours helps; after that, time does the work.
• Use a plain moisturizer on the flight, since the cabin air dries the skin.
• Restart retinoids and exfoliating acids once the skin is calm, usually after a few days.
• Wear sunscreen daily, since a fresh bruise can leave a brown tint on sun-exposed skin.

Leave other treatments at home until the bumps and any bruise have settled. Order matters if you'd like a facial in the same trip; I've covered it in how to time a hydra glow facial in Seoul.

Does a second session heal the same way?

Usually yes. Rejuran is typically given as a course of sessions a few weeks apart, and each session heals on the same clocks, with the same chance of a bruise. If you plan to split a course across trips, whether one Rejuran Healer session is enough explains how the spacing affects what you get from each visit.

Before you message us

Send two daylight photos, one from the front and one from the side, your arrival and departure dates, and a list of any supplements or medicines you take. Then ask the one question that matters for your trip: given my dates, which day should I book? The consult on WhatsApp in English is free, and a medical interpreter for your language comes at no extra charge. If you're ready to book, that same chat is where to ask how the deposit and payment work.

Healing times differ from one person to the next, which is why your dates matter as much as your skin. In the exam room, the first thing I'll look at on bruise-prone skin is how thin it is under your eyes and over your cheekbones, and where the visible vessels run.

Message us on WhatsApp with your photos and dates, and ask which session day leaves your skin enough time before you fly.

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.