Main guideAcne scar treatment Singapore — what it treats, who it suits, sessions, downtime and what decides the cost, by Dr Sin Yong.
Published 31 October 2026 · Reviewed by Dr Sin Yong
Acne scar treatment aftercare depends on which stage of the plan you have just had. Subcision leaves bruising under an intact surface, TCA CROSS leaves a small crust on each treated scar, and fractional CO2 or RF microneedling leaves redness and flaking. The rules shared by every stage are simple: keep the skin clean, leave crusts alone, stay out of the sun and report anything that is getting worse.
Message the clinic the same day if you notice
Pain, swelling or warmth that is increasing rather than settling.
Redness that spreads beyond the treated area.
Pus, thick yellow crusts or weeping after resurfacing.
A cluster of small blisters or sores, which can be a cold sore flare on freshly treated skin.
A firm, painful or growing lump after subcision or an injectable.
What should you do and avoid after acne scar treatment, stage by stage?
The table sets out acne scar treatment aftercare for each method used in a scar plan here. Each row lists what is expected, what to do, what to avoid and the signs that mean you should message the clinic.
Stage
What is expected
What to do
What to avoid
Message or call if
Subcision (release)
Bruising, swelling and tenderness over the released scars; a firm feeling as the space settles
Cool compresses for short periods; sleep with the head slightly raised; paracetamol if you can take it
Pressing or massaging the area unless told to; aspirin, fish oil and other blood-thinning supplements unless your doctor prescribed them
Pain that increases; spreading redness and warmth; a firm, painful lump that is growing
TCA CROSS (pits)
A white frost on each scar, then redness, then a small dark crust
Keep the crusts clean and dry; make-up around them once they are dry
Picking or scrubbing the crusts; sun on the treated points
Crusts that ooze or spread; redness widening around a point
Fractional CO2 (S3 Resurfacing Lift)
Redness, swelling, pinpoint bleeding and oozing at first; bronzing, crusting, then peeling
The written wound-care routine; a bland ointment as instructed; shade and a hat
Make-up, actives, heat, sweat and swimming until the surface has closed
Thick yellow crusts; blisters; fever; pain that increases
FSX Laser or RF microneedling
Redness, warmth and fine flaking; a grid of pinpoint marks after RF microneedling
Gentle cleanser and a plain moisturiser; sunscreen once you are told the surface is ready
Make-up over open channels; saunas and hot yoga; exfoliating acids and retinoids
Worsening redness, weeping or pus; swelling that increases
Collagen support (injectable)
Swelling or bruising at the injection points; early firmness
Leave the area alone; follow any massage instruction exactly
Pressure on the area; strenuous exercise if advised against
Skin turning white, dusky or mottled; worsening pain; a growing lump
Why does acne scar aftercare change from one stage to the next?
Acne scar aftercare changes with the stage because each stage injures a different layer. Dr Sin Yong sequences a scar plan as release, support, then resurface: subcision divides the bands that tether rolling scars, TCA CROSS treats narrow ice-pick tracts at their floor, calcium hydroxylapatite may be placed into a released space, and fractional CO2 (the S3 Resurfacing Lift on the DEKA SmartXide Tetra CO2), FSX Laser or RF microneedling works on the surface last. A bruise beneath intact skin needs different care from an open, peeling surface.
Illustrative image — not a patient.
That is also why the stages are spaced. The next step is timed to healed skin at review, not to a calendar, so the visible phases do not overlap. A 2026 network meta-analysis of 56 randomised trials in moderate to severe atrophic scars found that combination treatments generally ranked above single treatments, which is the reason most plans have more than one stage and therefore more than one set of aftercare instructions. Which scar gets which method is set out on the acne scar treatment Singapore page; what each stage looks like while it heals is pictured on acne scar treatment downtime.
Why does sun protection matter so much after acne scar treatment?
Sun protection matters because darkening, post-inflammatory hyperpigmentation, is the commonest unwanted mark after scar work in Asian skin. A 2013 focused review of acne-induced and procedure-related post-inflammatory hyperpigmentation in Asians described it as a normal response of Fitzpatrick III to VI skin to inflammation, said that prevention comes first, and warned that treatment itself can worsen it. In a 1998 series of 500 patients after fully ablative CO2 resurfacing, a more aggressive technique than the fractional passes used for scars today, hyperpigmentation was the most frequent pigment change and was more common in darker skin types, and cold sores flared in some patients regardless of their history.
In practice that means three things. Shade, a hat and avoidance of direct sun apply from the start; a broad-spectrum sunscreen is added once any open surface has closed and you are told to use it. Mention any history of cold sores before resurfacing, because preventive medicine may be prescribed. And darkening that appears after the skin has healed is reviewed rather than treated over, because a second injury on top of it tends to deepen it. The post-inflammatory hyperpigmentation page explains how those marks are managed.
When can you restart make-up, skincare and exercise after acne scar treatment?
Make-up waits until the surface under it is intact. After subcision and injectables that is straight away, because the skin was entered through small punctures and not resurfaced; after TCA CROSS it is around the crusts once they are dry; after RF microneedling it is once the pinpoint marks have closed; after fractional CO2 it is once peeling has finished and the clinic confirms the skin has re-epithelialised. Use a fresh sponge or clean brush, and remove make-up gently.
Retinoids, exfoliating acids, vitamin C serums and scrubs are paused until you are told to restart, which is usually later than people expect after resurfacing. A plain cleanser, a bland moisturiser and sun protection are enough. For ointment, plain white petrolatum is a reasonable default unless a different product was given: a 1996 randomised trial of 922 dermatologic surgery patients found white petrolatum and bacitracin ointment had comparably low infection rates, with no allergic reactions in the petrolatum group. Walking is fine throughout; hard exercise, saunas, steam and swimming wait until bruising has settled after subcision and until the surface has closed after resurfacing, because heat and sweat aggravate swelling and irritate healing skin.
When should you call the clinic after acne scar treatment?
Message the clinic on WhatsApp during clinic hours if you notice any of the following:
Pain, swelling or warmth that is increasing rather than settling.
Redness that spreads beyond the treated area.
Pus, thick yellow crusts or weeping after resurfacing.
A cluster of small blisters or sores, which can be a cold sore flare on freshly treated skin.
A firm, painful or growing lump after subcision or an injectable.
Skin turning white, dusky or mottled near an injection point.
Fever.
Skin colour change after an injectable, or any change in vision, needs to be seen the same day, and if no doctor can see you, go to a hospital emergency department. The complication care page sets out the warning signs in full. Most messages after scar work turn out to be ordinary bruising or a crust that is slow to shed; you will be told plainly whether what you describe is expected, needs a photograph or needs to be seen. The next stage is not booked until review shows the skin has healed, and the order of the stages is explained under subcision for acne scars and TCA CROSS.
Your next step
1. MessageWhatsApp +65 8023 7170 with what is bothering you. A reply comes from the clinic, not a bot.
2. AssessmentDr Sin Yong examines you himself on Orchard Road, with ultrasound where earlier filler is involved.
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.
Mention any history of cold sores and all medicines, including isotretinoin and blood thinners, before a scar stage is booked. How consultations work.
How the needles and the heat work, and who they suit: microneedling RF.
Frequently Asked Questions
Acne scar treatment aftercare follows the stage you had. Keep the skin clean with a gentle cleanser, leave crusts and scabs to shed on their own, avoid direct sun, and pause retinoids and exfoliating acids until the clinic says to restart. After subcision expect bruising under intact skin; after TCA CROSS, small crusts; after fractional CO2 or RF microneedling, redness and peeling.
Make-up goes on once the surface under it is intact. After subcision or an injectable that is straight away; after TCA CROSS it is around the crusts once they are dry; after RF microneedling it is once the pinpoint marks have closed; after fractional CO2 it is once peeling has finished and the clinic confirms the skin has healed. Use clean applicators and remove it gently.
Yes. Subcision divides fibrous bands beneath the scars, and small vessels bleed into the space it creates, so bruising, swelling and tenderness over the released scars are expected and can be marked. The surface itself stays intact. Avoid pressing on the area and blood-thinning supplements unless prescribed. A firm, painful lump that is growing, or pain that increases, needs a review.
No. Each crust protects healing skin beneath it, and pulling it off early risks a dark mark or a pit that outlasts the scar, particularly in Fitzpatrick III to V skin. Keep the crusts clean, let them shed on their own and keep them out of the sun. Crusts that ooze, spread or turn thick and yellow should be photographed and sent to the clinic.
Retinoids, exfoliating acids, vitamin C serums and scrubs are restarted when the clinic tells you the skin is ready, which is after any open surface has closed and redness has settled. After resurfacing that is usually later than after subcision. Restarting too early irritates healing skin and raises the chance of darkening, so a plain cleanser, moisturiser and sun protection are enough until then.
Darkening after scar treatment is usually post-inflammatory hyperpigmentation, the skin's pigment response to injury, which is common in Asian skin. It is more likely with sun exposure or picking. It is reviewed rather than treated over, because a further injury tends to deepen it, and it is managed with strict sun protection and topical care. Send a photograph so the change can be checked.
References
Laser, Microneedling, and Combination Therapies for Moderate to Severe Acne Atrophic Scars: A Systematic Review and Network Meta-Analysis. Aesthetic Plastic Surgery (Ou Y, An G, Liang J, et al.), 2026. source
A focused review on acne-induced and aesthetic procedure-related postinflammatory hyperpigmentation in Asians. Journal of the European Academy of Dermatology and Venereology (Eimpunth S, Wanitphadeedecha R, Manuskiatti W), 2013. source
Complications of carbon dioxide laser resurfacing. An evaluation of 500 patients. Dermatologic Surgery (Nanni CA, Alster TS), 1998. source
Infection and allergy incidence in ambulatory surgery patients using white petrolatum vs bacitracin ointment. A randomized controlled trial. JAMA (Smack DP, Harrington AC, Dunn C, et al.), 1996. source
About this page: written and medically reviewed by Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh) · Last reviewed 7 November 2026 · Illustrative images only, not patients · Editorial policy
