Skin & Aesthetics · Laser resurfacing
Fractional Laser Resurfacing in Seoul: Ablative vs Non-Ablative
Fractional laser resurfacing treats the skin in thousands of tiny columns while leaving the skin between them intact, so it heals faster and builds new collagen to soften acne scars, enlarged pores, fine lines and rough texture. At Hommage Clinic in Gangnam, Seoul, Dr. Hwang Seonhwa assesses your skin type and goals, then recommends a non-ablative or ablative approach that balances results, downtime and pigmentation risk.
Quick answer
Fractional laser resurfacing treats the skin in microscopic columns, leaving healthy skin in between, to rebuild collagen and soften acne scars, pores, fine lines and rough texture. At Hommage Women's Clinic in Gangnam, Seoul, Dr. Hwang Seonhwa chooses non-ablative (about 3–5 sessions, 1–3 days of redness) or ablative fractional laser (about 1–3 sessions, 5–7 days of crusting) for your skin type, with results building over 3–6 months.
Key takeaways
- "Fractional" means only a fraction of the skin is treated per session, which shortens healing compared with full resurfacing.
- Non-ablative is gentler with less downtime; ablative gives more change per session but more recovery and pigment risk.
- In Asian skin the main risk is temporary darkening (PIH), so settings are kept conservative and sun protection is strict.
- Results come from new collagen and appear gradually; judge each session at 3–6 months.
- Deep ice-pick scars, sagging and active acne need other or combined treatments.
Infographic
Fractional laser in numbers
Laser time
After about 30–60 minutes of numbing cream.
Non-ablative sessions
Spaced about 4–6 weeks apart.
Ablative sessions
Spaced further apart for full healing.
Non-ablative downtime
Sunburn-like redness, then light flaking.
Ablative downtime
Pinpoint crusts and peeling, then pinkness.
Result visible
As new collagen forms after each session.
Fractional laser at a glance
| Key fact | Details |
|---|---|
| Treatment time | Usually 20–40 minutes of laser time, after about 30–60 minutes of numbing cream |
| Comfort | Topical numbing cream and cooling; most people feel heat and prickling |
| Sessions | Non-ablative: typically 3–5; ablative: typically 1–3; spaced about 4–8 weeks apart |
| Downtime | Non-ablative: 1–3 days of redness; ablative: about 5–7 days of crusting and peeling |
| Results visible | Gradually, over about 3–6 months as new collagen forms |
| How long results last | Scar and texture gains are long-lasting; skin keeps aging, so some choose maintenance |
| Performed by | Dr. Hwang Seonhwa, physician for skin and aesthetic treatments |
Fractional laser may suit you if you have
- Rolling or boxcar acne scars, or other healed, depressed scars
- Enlarged pores, rough texture or a dull, uneven surface
- Fine lines and early crepiness around the eyes or cheeks
- Texture changes from long-term sun exposure
Wait or choose another option if you have
- Pregnancy or breastfeeding (elective laser treatment is usually postponed)
- An active cold sore, skin infection or inflamed acne in the treatment area
- Recent isotretinoin (Roaccutane) use, a fresh tan or sunburn: discuss timing with your doctor
- A history of keloid scars, vitiligo or an active melasma flare
How does fractional laser resurfacing work?
A fractional laser splits its beam into a grid of microscopic columns, called microthermal zones, that reach into the dermis. Only a fraction of the skin surface is treated in each session, and the untouched skin around each column speeds healing.
Each column triggers a wound-healing response. Over the following months, the skin replaces damaged tissue with new collagen and elastin, which gradually smooths scars, tightens pores and refines texture. Because the lasers used for resurfacing target water in the skin, the energy and density settings control how deep and how intense each treatment is.
Ablative vs non-ablative fractional laser: which is right for you?
The main difference is whether the laser removes tissue. Non-ablative lasers heat columns of skin under an intact surface, while ablative lasers vaporize tiny channels through the surface. More depth and intensity usually means stronger results per session, but also more downtime and risk.
- Non-ablative fractional (for example, 1,550 nm erbium-glass or 1,927 nm thulium wavelengths): redness and swelling for about 1–3 days, a sandpaper feel as tiny bronze dots flake off, and a series of sessions. Often the starting point for pores, mild scars and texture.
- Ablative fractional : CO2 laser resurfacing (10,600 nm) for deeper scars and wrinkles, or Er:YAG laser resurfacing (2,940 nm) for a more superficial, faster-healing treatment. Expect about 5–7 days of redness, pinpoint crusting and peeling.
Fully ablative resurfacing, which removes the whole top layer of skin, gives the strongest single-treatment change but needs weeks of recovery and carries a higher risk of pigment change in Asian and darker skin, so fractional settings are usually preferred.
What can fractional laser treat, and what can it not?
Fractional laser is most useful for texture problems in the skin itself. Common goals include:
- Depressed acne scars, often combined with other methods. See fractional laser for acne scars for scar-specific planning.
- Enlarged pores and uneven, rough skin.
- Fine lines, mild crepiness and sun-related texture.
- Older, pale stretch marks , with modest, gradual improvement.
It is not the right tool for everything. It does not lift sagging skin, treat active acne breakouts or remove deep ice-pick scars on its own, and it can sometimes worsen melasma. For pigment-led concerns, a dedicated melasma treatment plan is usually safer.
What happens during treatment?
A session usually takes about an hour in total, including numbing time. Your face is cleansed, a topical anesthetic cream is applied, and your eyes are covered with protective shields. The doctor then passes the laser handpiece over each area in planned passes, with cooling air or cold compresses to keep you comfortable. Most people describe the feeling as warm prickling. Afterward, your skin is soothed and moisturized, and you go home with written aftercare instructions.
How long is the recovery after fractional laser?
Recovery depends on the type of laser and its settings. After non-ablative treatment, your skin looks sunburned for 1–3 days and may feel rough for about a week. After ablative fractional treatment, expect swelling, oozing or pinpoint crusts for about 5–7 days, then pinkness that can last a few weeks.
Good aftercare protects your result:
- Strict sun protection: stay out of strong sun and use a broad-spectrum SPF 30+ sunscreen once the surface has healed, for at least 2–3 months.
- Keep the skin moisturized with the gentle products you are given, and cleanse with lukewarm water.
- Do not pick, scratch or scrub crusts or flakes. Let them shed naturally.
- Pause retinoids, acids and exfoliating products until your doctor says it is safe, usually 1–2 weeks.
Collagen remodeling continues for months, so the final result of a session is usually judged at about 3–6 months.
Risks and possible side effects
Fractional laser is a well-established treatment, but it is a medical procedure with real risks, which Dr. Hwang will go through with you before you consent:
- Prolonged redness or swelling , especially after ablative treatment.
- Post-inflammatory hyperpigmentation (PIH): temporary darkening, more common in Asian and darker skin. It usually fades over weeks to months with sun protection and treatment.
- Infection: bacterial, viral or fungal, mainly while the skin is open after ablative treatment.
- Cold sore (herpes simplex) reactivation: if you have ever had cold sores, an antiviral medicine is usually prescribed before and after treatment.
- Acne flares or milia (tiny white bumps).
- Rarely, scarring or lighter patches of skin.
Call the clinic promptly if you notice increasing pain, pus or yellow crusts, clusters of small blisters, fever, or redness that spreads or worsens after the first few days.
Fractional laser resurfacing at Hommage Clinic
Hommage Clinic is a women's health and skin clinic in Gangnam, a short walk from Sinnonhyeon Station. Your treatment is planned by a doctor, who chooses the laser type, depth and density for your skin rather than using a fixed package. Fractional laser can be combined with other treatments in ourskin and aestheticsservices, such as skin boosters to support recovery, and hormone-related skin concerns can be discussed with our OB/GYN team under the same roof.
Cost depends on the type of laser, the area treated and the number of sessions. Cosmetic laser resurfacing is not covered by Korea's National Health Insurance, although many medical tests and treatments are for enrolled patients. You receive a written quote before any treatment, and walk-ins are welcome during opening hours.
Mechanism
How fractional laser works: microthermal zones and skin bridges
Fractional photothermolysis, first described in 2004, divides the laser beam into a grid of microscopic treatment columns called microthermal zones. Each column is a fraction of a millimetre wide, and the skin between columns is left untouched. Those healthy "skin bridges" supply the cells that close each column quickly, which is why fractional treatment heals in days rather than the weeks needed after fully ablative resurfacing. Depth (energy) and density (how much of the surface is covered) are set separately, so the same device can give a gentle texture treatment or a stronger scar treatment.
Compare
Ablative vs non-ablative fractional laser, side by side
Both types work through microscopic columns, but they differ in what happens at the surface. A non-ablative laser heats columns of tissue under an intact surface; an ablative laser vaporizes tiny open channels through it. A 2025 meta-analysis of seven studies found ablative lasers gave greater scar improvement, while non-ablative lasers caused less pain and shorter redness. The right choice depends on how much change you want per session, how much downtime you can take and your pigmentation risk.
Non-ablative fractional
Examples: 1,550 nm erbium-glass, 1,927 nm thulium.- Redness and swelling for about 1–3 days; skin feels rough for about a week
- Usually 3–5 sessions, 4–6 weeks apart
- Lower risk of darkening; often the first choice for pores, mild scars and texture
Ablative fractional
Examples: CO2 10,600 nm, Er:YAG 2,940 nm.- Oozing, pinpoint crusts and peeling for about 5–7 days, then pinkness for weeks
- Usually 1–3 sessions, spaced further apart
- More change per session for deeper scars and wrinkles, with higher pigment risk
Hommage · Gangnam
Hommage Women's Clinic · Gangnam, Seoul
A skin assessment checks scar type, skin type and medical history before any laser. Illustrative photo.
Is it for me?
Who is a good candidate for fractional laser resurfacing?
Good candidates have a texture problem in the skin itself, realistic expectations about gradual change, and the time to follow aftercare and sun protection. Your scar type matters too: rolling and shallow boxcar scars respond better than narrow, deep ice-pick scars, which often need TCA CROSS or subcision first. These questions help Dr. Hwang Seonhwa decide whether fractional laser fits, and which type.
- Is your main concern texture, scars or pores? Fractional laser treats the skin surface and dermis, not sagging or volume loss.
- Is your acne under control? Active breakouts are treated first, for example with acne treatment.
- Can you avoid strong sun for 2–3 months? Sun exposure is the biggest driver of darkening after laser.
- Do you get cold sores or melasma? Antiviral cover or a pigment-first plan may be needed.
- Have you taken isotretinoin recently? Timing is discussed with your doctor.
- Can you plan for downtime? 1–3 days for non-ablative, about a week for ablative.
Healing
Fractional laser recovery timeline: day by day
Recovery after fractional laser follows a clear pattern, but its length depends on whether the treatment was non-ablative or ablative and how strong the settings were. The timeline below shows both side by side, so you can plan work, social events and travel around your session.
Asian skin
Fractional laser for Asian skin: lowering the risk of dark marks
Post-inflammatory hyperpigmentation (PIH) is temporary darkening after skin inflammation, and it is the most common problem after laser resurfacing in Asian skin. In a small Hong Kong study of Chinese patients treated once with ablative fractional CO2 laser, PIH was seen in more than half of patients at one month but had fallen to about one in ten by six months. Non-ablative fractional lasers carry a lower risk, which is why many plans for Asian skin start gently and build up.
How the risk is reduced
- Lower density, more sessions: treating less of the surface per session lowers heat and inflammation.
- Choosing the season: many people prefer autumn and winter in Seoul, when sun exposure is lower.
- Skin preparation: in some cases, a pigment-calming routine is used beforehand.
- Strict sun protection: broad-spectrum SPF 30+ and a hat for at least 2–3 months.
- Early treatment of darkening: if PIH appears, it is treated promptly rather than waiting.
If melasma is your main concern, fractional laser can sometimes make it worse; a dedicated melasma treatment or laser toning plan is usually safer.
Hommage · Gangnam
Hommage Women's Clinic · Gangnam, Seoul
For Asian skin, gentler settings over more sessions lower the risk of dark marks. Illustrative photo.
Hommage · Gangnam
Hommage Women's Clinic · Gangnam, Seoul
Numbing cream is applied for about 30–60 minutes before treatment. Illustrative photo.
Plan ahead
How to prepare for fractional laser, and what it combines with
A little preparation makes treatment smoother and lowers the risk of complications. In the two weeks before your session, avoid tanning and sunburn, and tell the clinic about any cold sores, recent isotretinoin, blood thinners or skin conditions. Retinoids and exfoliating acids are usually paused for a few days beforehand. Arrive with clean skin and no makeup if possible; the numbing cream needs time to work.
Fractional laser vs other texture treatments
Fractional laser is one of several tools for scars and texture. RF microneedling delivers heat through fine needles with relatively low pigment risk and is popular for pores and rolling scars. Microneedling alone is gentler still. For deep, tethered scars, subcision releases the bands that pull the skin down, and TCA CROSS targets narrow ice-pick scars. Many acne scar plans combine two or more of these over several months. After resurfacing, some people add skin boosters such as Rejuran to support hydration, although evidence that this speeds recovery is limited.
Aftercare
Fractional laser aftercare: do's and don'ts
Most problems after fractional laser, especially darkening and infection, are linked to what happens in the first two weeks. You receive written instructions and the products to use, and you can message the clinic with a photo if anything worries you.
Do
- Cleanse with lukewarm water and a gentle, fragrance-free cleanser
- Keep skin moist with the ointment or moisturizer provided
- Use cool compresses for heat and swelling in the first 1–2 days
- Use SPF 30+ once the surface has healed, for at least 2–3 months
- Sleep slightly propped up on the first night to reduce swelling
- Take antivirals exactly as prescribed if you get cold sores
Don't
- Pick, scratch or scrub flakes and crusts
- Use saunas, hot yoga or hard exercise in the first few days
- Swim in pools or the sea until the skin is closed
- Restart retinoids or acids before your doctor says so, usually 1–2 weeks
- Wear heavy makeup on open skin after ablative treatment
- Sunbathe or tan for the next few months
Hommage · Gangnam
Hommage Women's Clinic · Gangnam, Seoul
Daily sunscreen is the single most important aftercare step. Illustrative photo.
Evidence
Does fractional laser work? What the research says
Fractional laser is one of the better-studied treatments for acne scars and skin texture, and both ablative and non-ablative types have been shown to help. However, most trials are small, use different devices and settings, and rely partly on visual scoring, so the size of the benefit varies between studies. The findings below are the most useful for planning; they support fractional laser as a reasonable option while making clear that results are gradual and partial rather than complete.
Ablative vs non-ablative
Meta-analysis of 7 studies and 186 cases: ablative gave greater improvement; non-ablative had less pain and shorter redness.
Ke et al., J Dtsch Dermatol Ges, 2025PIH fades over time
After one ablative CO2 session in Chinese patients, darkening fell from 55.5% at 1 month to 11.1% at 6 months.
Chan et al., Lasers Surg Med, 2010Satisfaction
Of patients in the same small Asian study were satisfied or very satisfied, with mild to moderate improvement.
Chan et al., Lasers Surg Med, 2010Concept introduced
Fractional photothermolysis showed that microscopic columns heal quickly from surrounding untreated skin.
Manstein et al., Lasers Surg Med, 2004Traveling to Seoul
Fractional laser in Seoul for international patients
Fractional laser can be planned around a trip to Seoul, but the type of laser decides how long you should stay. Hommage Women's Clinic is in Gangnam, a short walk from Sinnonhyeon Station (Line 9 and Shinbundang Line).
How long to stay
- Non-ablative: about 3–4 days is usually enough to see the redness settle before you fly.
- Ablative: plan about 7 days so crusts can shed and the skin can be checked.
- A full course of 3–5 non-ablative sessions takes months, so many visitors have one session per trip, or continue with a dermatologist at home.
Before you book
- Send photos and your dates by WhatsApp, KakaoTalk or the contact form, and ask for language support if needed.
- Avoid sunburn and tanning for two weeks before your visit.
- Bring your passport, a list of medicines and any history of cold sores or isotretinoin use.
- Avoid beach holidays straight after treatment.
Hommage · Seoul
Hommage Women's Clinic · Gangnam, Seoul
Seoul: the clinic is in Gangnam, near Sinnonhyeon Station. Illustrative photo.
Hommage · Gangnam
Hommage Women's Clinic · Gangnam, Seoul
Aftercare products and a written plan should come with every treatment. Illustrative photo.
Choosing well
How to choose a fractional laser clinic in Seoul
Gangnam has many clinics offering laser resurfacing, often in packages. These questions help you compare them, including us:
- Does a doctor assess your skin and set the laser? Settings should be chosen for your skin, not a fixed package.
- Do they offer both non-ablative and ablative options? So the recommendation is not limited by the machines available.
- Do they explain pigmentation risk for Asian skin? And how they will reduce it.
- Is antiviral cover discussed? Especially if you have had cold sores.
- Are aftercare and follow-up included? You should know who to contact if something goes wrong.
- Is the quote written? Including the expected number of sessions.
What affects fractional laser cost in Seoul?
The price depends on the laser type (non-ablative or ablative), the area treated (full face, cheeks only, neck), the depth and density needed, the number of sessions, and whether it is combined with other treatments such as RF microneedling or subcision. Numbing, aftercare products and follow-up are explained in your quote. Cosmetic laser resurfacing is not covered by Korea's National Health Insurance, and you receive a written quote before treatment.
Your visit
What to expect at your fractional laser appointment
01
Skin assessment
Dr. Hwang examines your scars or texture, skin type, cold-sore history and medications, then explains which fractional approach suits you.
02
Preparation
Your face is cleansed and numbing cream is applied for about 30–60 minutes. An antiviral may be started beforehand if you get cold sores.
03
Laser treatment
The doctor treats each area in planned passes, with eye protection and cooling throughout.
04
Aftercare and review
You go home with written aftercare and a sun-protection plan, and a review is booked to check healing and plan any next session.
Your doctor
Dr. Hwang Seonhwa
Physician · Skin & Aesthetic Treatments
Dr. Hwang chooses fractional laser settings by weighing your goal against your skin type and the time you can take off. For skin prone to pigmentation, Dr. Hwang often starts with gentler settings and builds up over several sessions rather than aiming for a single aggressive treatment.
Physician for face and skin procedures, including lifting, laser and skin-improvement treatments, planned around facial proportions and skin condition.
Fractional laser resurfacing: frequently asked questions
Does fractional laser resurfacing hurt?
Most people feel heat and a prickling or snapping sensation, which numbing cream and cooling make manageable. Ablative treatments feel more intense than non-ablative ones. Afterward, your skin may feel like a sunburn for a few hours to a day. Tell the doctor during treatment if you are uncomfortable, as settings and cooling can be adjusted.
How many fractional laser sessions will I need?
Non-ablative fractional laser usually needs about 3–5 sessions spaced about 4–6 weeks apart. Ablative fractional laser often needs 1–3 sessions, spaced further apart to allow full healing. Deep acne scars may need more sessions or a combination with other methods. Dr. Hwang will suggest a plan after seeing your skin.
How long do fractional laser results last?
Improvements in scars and texture are long-lasting because they come from new collagen in your skin. However, your skin continues to age and respond to sun exposure, so fine lines and pores can gradually return. Some people choose a maintenance session every 6–12 months, along with daily sun protection.
Is fractional laser safe for Asian or darker skin?
Yes, with careful planning. Asian and darker skin types have a higher risk of temporary darkening (post-inflammatory hyperpigmentation) after laser treatment. The doctor lowers this risk with conservative density settings, more sessions at gentler levels when needed, strict sun protection and, in some cases, skin preparation before treatment.
Can I wear makeup after fractional laser?
After non-ablative treatment, light mineral makeup is usually fine from the next day if your skin is not irritated. After ablative treatment, wait until the crusts have shed and the surface has healed, usually about 5–7 days. Use clean brushes and gentle, fragrance-free products, and follow your written aftercare instructions.
Can foreigners get fractional laser resurfacing in Seoul?
Yes. International patients and foreign residents can book an appointment at Hommage Clinic and should bring a passport for registration. Plan your trip so you have enough recovery time before flying or sun exposure, especially after ablative treatment. Please contact us before your visit to arrange language support.
What is the difference between ablative and non-ablative fractional laser?
Non-ablative fractional lasers heat microscopic columns of skin under an intact surface, so downtime is about 1–3 days of redness and several sessions are needed. Ablative fractional lasers, such as CO2 and Er:YAG, vaporize tiny open channels, giving more change per session but about 5–7 days of crusting and a higher risk of temporary darkening. A 2025 meta-analysis found ablative lasers gave greater scar improvement, while non-ablative lasers caused less pain and shorter redness.
When will I see results from fractional laser?
Skin often looks smoother once flaking finishes, about a week after treatment, but the main improvement comes from new collagen that forms over the following months. Each session is usually judged at about 3–6 months, and a full course adds up gradually.
Can fractional laser make my skin darker?
It can cause temporary darkening, called post-inflammatory hyperpigmentation, which is more common in Asian and darker skin and after ablative treatment. In a small study of Chinese patients treated with ablative fractional CO2, darkening affected more than half at one month but about one in ten at six months. Gentle settings, strict sun protection and early treatment of any darkening lower the risk.
Is fractional laser good for acne scars?
Yes, it is one of the main treatments for rolling and shallow boxcar acne scars, with gradual, partial improvement over a course. Deep ice-pick scars and tethered scars usually also need TCA CROSS or subcision. See fractional laser for acne scars for scar-specific plans.
Fractional laser or RF microneedling: which is better?
Both stimulate collagen. Fractional laser acts on the skin surface and dermis with light, while RF microneedling delivers heat through fine needles and tends to carry a lower risk of darkening, which some people with Asian skin prefer. The better choice depends on your scar type, skin type and downtime; they are sometimes combined. Read more about RF microneedling.
Can I have fractional laser if I take isotretinoin or get cold sores?
Tell your doctor about both. Timing after isotretinoin (Roaccutane) is discussed individually. If you have ever had cold sores, an antiviral medicine is usually prescribed before and after treatment, because laser can trigger a flare.
What is the best season for fractional laser in Seoul?
Many people prefer autumn and winter, when sun exposure is lower and it is easier to protect healing skin. Treatment is possible year-round with strict sun protection, but avoid planning a beach holiday in the weeks after a session.
References
Sources used for this page, reviewed by Dr. Hwang Seonhwa. Read our editorial and medical review policy.
- Manstein D, et al. Fractional photothermolysis: a new concept for cutaneous remodeling using microscopic patterns of thermal injury. Lasers Surg Med. 2004. PubMed
- Ke R, Cai B, Ni X, et al. Efficacy and safety of non-ablative vs. ablative lasers for acne scarring: a meta-analysis. J Dtsch Dermatol Ges. 2025. doi:10.1111/ddg.15651
- Chan NPY, et al. Fractional ablative carbon dioxide laser resurfacing for skin rejuvenation and acne scars in Asians. Lasers Surg Med. 2010. doi:10.1002/lsm.20974. PubMed
- Fractional photothermolysis: review of mechanism and clinical applications. Semin Cutan Med Surg. Vol 27(1). PDF
This page is general information and does not replace a personal consultation. Illustrations are original works of Hommage Women's Clinic, Gangnam, Seoul; photos marked illustrative are not of patients.
Related laser and skin treatments
CO2 Laser Resurfacing
Ablative 10,600 nm laser for deeper acne scars and wrinkles, with about a week of downtime.
Er:YAG Laser Resurfacing
Precise ablative laser with less heat, for fine lines and texture with faster healing.
Fractional Laser for Acne Scars
Scar-focused fractional laser plans, often combined with subcision or TCA CROSS.
RF Microneedling
Radiofrequency delivered through fine needles to tighten pores and remodel scars.
Rejuran
PDRN skin-booster injections that support skin repair and hydration.
Vaginal Laser Therapy
Medical laser treatment for vaginal dryness and menopause-related symptoms, led by an OB/GYN.
Find the right fractional laser plan for your skin
Book a skin assessment with Dr. Hwang Seonhwa in Gangnam to compare non-ablative and ablative options, downtime and timing.
Hommage Clinic · 4F, Building A, 509 Gangnam-daero, Seoul (near Sinnonhyeon Station) · Mon & Fri 10:00–20:00 · Tue–Thu 10:00–19:00 · Sat 10:00–15:00