Aftercare · Polynucleotide skin booster

Rejuran aftercare:
papules, cleansing, sunscreen and what to avoid

Medically reviewed by Dr Sin Yong · Last reviewed · 7 min read · Jump to questions

Published 20 October 2026 · Reviewed by Dr Sin Yong

Illustrative image for Rejuran aftercare — not a patient

Rejuran aftercare starts with leaving the papules alone. Rejuran is a polynucleotide placed in the dermis as a distributed pattern of micro-injections, so small papules at each point straight afterwards are the expected appearance, not a complication. Cleanse gently, avoid make-up, heat, alcohol and vigorous exercise on the first day, use sunscreen daily, and report pain that increases, spreading redness or swelling that does not subside.

Part of Aftercare →

Key facts
Papules
Small raised points across the treated area are expected; they settle as the polynucleotide is taken up, sometimes a little slower than with hyaluronic acid boosters
Cleansing
Lukewarm water and a mild cleanser in the evening; pat dry; no scrubs, acids or retinoids until the skin is ordinary again
Make-up
Avoid until the entry points have closed; then applied lightly over intact skin and removed gently
Sunscreen
Broad-spectrum every morning once the entry points have closed, over intact skin; cover bruises
Avoid
Massage of the points, heat, alcohol, vigorous exercise, facials and at-home devices on the first day
Report
Pain that increases instead of settling, spreading redness and warmth, swelling that does not subside, or skin changing colour
On this page
  1. Why are there papules after Rejuran, and will they go?
  2. How should you cleanse and care for the skin after Rejuran?
  3. What should you avoid after Rejuran, and how does sunscreen fit in?
  4. What is normal after Rejuran, and what is not?
  5. When should you call the clinic after Rejuran, and what happens at review?
  6. Frequently Asked Questions
  7. Related
  8. Speak With Dr Sin Yong
In brief

Rejuran aftercare protects the entry points while the papules settle, which can be a little slower than with hyaluronic acid boosters. Cleanse with lukewarm water and a mild cleanser, skip scrubs, acids and retinoids until the skin is ordinary again, and keep make-up off until the points have closed. Sunscreen follows each morning; pain that increases or spreading redness is reported.

Why are there papules after Rejuran, and will they go?

Papules after Rejuran are expected. The product is a polynucleotide purified from salmon DNA, delivered by fine needle in a distributed pattern of micro-injections across the face, or by an injector device placing small volumes at a set depth. Each deposit sits in the dermis as a small raised point until the tissue takes the material up, and because the deposits are many and shallow, the face can look dotted for a short while. That is the appearance of a correct treatment. Bruising is possible, more so around the eyes where the skin is thin and vessels run close to the surface.

Illustrative image — Why are there papules after Rejuran, and will they go?; not a patient
Illustrative image — not a patient.

The papules settle on their own as the polynucleotide is absorbed. With polynucleotides they can last a little longer than the blebs after a hyaluronic acid booster, and that is normal. Do not press, rub or massage them unless you have been told to, and do not pick at any pinpoint crust that forms over an entry point. The Rejuran page explains what the polynucleotide is directed at and why the early papules are not the result; the change in texture and hydration develops gradually afterwards.

How should you cleanse and care for the skin after Rejuran?

On the first evening, cleanse with lukewarm water and a mild, non-foaming cleanser, using fingertips rather than a cloth or brush, and pat dry. Do not use scrubs, exfoliating acids, retinoids or vitamin C serums until the papules have gone and the skin feels ordinary again, because the entry points are many and each is a route for irritation. A plain moisturiser is fine once the skin is dry. Keep hands off the face in between, and change the pillowcase before you sleep.

Avoid make-up until the entry points have closed, so that pigment and bacteria are not carried into entry points that have not closed. After that, make-up can go on lightly over intact skin and be removed gently without rubbing; a light concealer over a bruise is better than foundation worked in with a brush. Normal skincare can usually restart once the points have closed, with active products returned one at a time once the skin is calm. No new active product should be started while the points are still settling.

Avoid heat, alcohol and vigorous exercise on the first day. Hot showers on the face, saunas, steam and hot yoga widen blood vessels and prolong swelling and bruising, and hard exercise raises blood pressure and does the same. A cool compress held lightly for a short spell eases swelling; do not press. Sleep face-up with the head slightly raised while the points are tender.

“The papules are not the result. They are the product sitting where it was placed; the result is what the skin does with it afterwards.”

Dr Sin YongOn recovery after Rejuran

What should you avoid after Rejuran, and how does sunscreen fit in?

Sunscreen goes on every morning once the entry points have closed, over intact skin, and is reapplied if you are outdoors. Skin that has just been treated is more reactive, and a bruise exposed to the sun can leave a brown mark in Fitzpatrick III to V skin, so bruised areas are covered or kept under sunscreen. Daily sun protection also supports the skin while it responds, which is the point of the treatment. No deliberate tanning while the points are settling.

For the following days, avoid anything that presses, heats or abrades the treated skin: facials, facial massage, gua sha, microneedling or at-home devices, and any energy-based treatment over the same area until it is spaced as set out in your plan. Waxing or threading on the treated skin waits until the papules have gone. Swimming in chlorinated pools can wait until the entry points have closed. If Rejuran was placed around the eyes, contact lenses can be worn once any swelling has settled, and eye make-up waits until the skin there is ordinary again.

Aftercare at a glance

PhaseWhat is usualWhat to do
Straight afterPapules at each point; redness; sometimes bruising, more around the eyesLeave the points alone; no make-up
The first eveningPapules beginning to flatten; mild tendernessGentle cleanse; cool compress; no heat, alcohol or vigorous exercise
The following daysPapules settle; bruising fades; skin looks ordinary againSunscreen daily; make-up over intact skin; no facials, devices or massage yet
As the skin settlesTexture and hydration change gradually, not on the daySimple routine; judge the change at review

What is normal after Rejuran, and what is not?

Normal after Rejuran is papules that settle, redness, mild swelling and tenderness at the injection points, and bruising, especially around the eyes. The general rules on the skin booster aftercare page apply to Rejuran as they do to Profhilo. These effects resolve on their own and are covered in the written aftercare.

Not normal is pain that increases instead of settling, redness that is spreading with warmth, pus at an entry point, or swelling that does not subside. Nodules can occur where material is deposited unevenly or too superficially and are examined rather than massaged. Infection is uncommon but possible with any needle through skin, which is why the entry points are kept clean and make-up is delayed. Allergic reaction is rare, and it is the reason fish allergy is asked about directly before treatment; itching, hives or swelling that spreads beyond the treated area needs review the same day, and swelling of the lips, tongue or throat with difficulty breathing is an emergency.

Skin turning white, dusky or net-like near a point, or pain that is severe and worsening, is time-critical and needs assessment the same day. These events are rare with intradermal placement, but low risk is not absence of risk.

When should you call the clinic after Rejuran, and what happens at review?

Message the clinic on WhatsApp during clinic hours if you notice any of the following:

Go straight to a hospital emergency department for swelling of the lips, tongue or throat with difficulty breathing, or any change in vision, and do not wait for a message reply. The complication care page sets these signs out in full. Most messages after Rejuran turn out to be papules that are taking their time or a bruise near the eye, and you will be told plainly whether what you describe sounds expected, needs to be seen, and how soon.

The review is timed once the papules and bruising have gone and the skin has had time to respond, because changes in texture and hydration develop gradually rather than on the day. The plan, and any interval between visits, is set individually at that review from what the skin is doing. If you had Rejuran elsewhere and something feels wrong, the same warning signs apply; bring the preparation used, the areas and the date. The consultation process page describes how an assessment here works, and the flying after treatment page covers travel timing.

Your next step
  1. 1. MessageWhatsApp +65 8023 7170 with what is bothering you. A reply comes from the clinic, not a bot.
  2. 2. AssessmentDr Sin Yong examines you himself on Orchard Road, with ultrasound where earlier filler is involved.
  3. 3. A plan in writingWhat he would do, what he would not, the fee factors, and the option of no treatment.

Every treatment is performed by Dr Sin Yong personally. Singapore Medical Council registered · invited to share his clinical expertise internationally for CLASSYS, DEKA, Fotona, Hironic and Ilooda.

Tell the clinic about any fish allergy before the visit; it is asked about directly, never assumed. How consultations work.

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Frequently Asked Questions

They settle as the polynucleotide is taken up, usually fairly quickly and occasionally a little more slowly than the blebs after a hyaluronic acid booster. Leave them alone; do not press or massage them. A point that is getting larger rather than flattening, or that persists once the others have gone, is examined.

Yes, gently, on the first evening: lukewarm water, a mild non-foaming cleanser applied with fingertips, and pat dry. No scrubs, cloths, exfoliating acids, retinoids or vitamin C serums until the papules have gone and the skin feels ordinary, because each entry point is a route for irritation.

Sunscreen goes on every morning once the entry points have closed, over intact skin, and bruises are kept covered or under sunscreen so they do not leave a brown mark. Make-up waits until the entry points have closed, then goes on lightly over intact skin and is removed gently without rubbing.

Walking is fine once the first day is over. Vigorous exercise, hot classes, saunas and steam raise blood pressure and skin temperature, which add to swelling and bruising at the points, so leave them until the papules have settled and bruising has stopped spreading.

Bruising is more likely around the eyes, where the skin is thin and vessels run close to the surface, and it fades on its own. Keep it covered or under sunscreen so it does not darken in the sun. Bruising with increasing pain, spreading redness or swelling that does not subside is reported.

References

A phase III, randomized, double-blind, matched-pairs, active-controlled clinical trial and preclinical animal study to compare the durability, efficacy and safety between polynucleotide filler and hyaluronic acid filler in the correction of crow's feet: a new concept of regenerative filler. Journal of Korean Medical Science (Pak CS, Lee J, Lee H, et al.), 2014. source

A randomized, participant- and evaluator-blinded, matched-pair, prospective study comparing the safety and efficacy between polycaprolactone and polynucleotide fillers in the correction of crow's feet. Journal of Cosmetic Dermatology (Choi SY, Koh YG, Yoo KH, et al.), 2025. source

Applications of marine organism-derived polydeoxyribonucleotide: its potential in biomedical engineering. Marine Drugs (Kim TH, Heo SY, Oh GW, et al.), 2021. source

About this page: written and medically reviewed by Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh) · Last reviewed 20 October 2026 · Illustrative images only, not patients · Editorial policy

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