Gangnam
Dr. Yoongon Ryu
Aesthetic Medicine Specialist
Flagship clinic · KOL for leading lifting & regenerative devices
Because CO2 laser rebuilds real collagen over 3 to 6 months, improvements in scars and texture often hold for several years with good sun care.
CO2 laser results often last several years because the treatment rebuilds real collagen rather than masking the surface. Scar and texture gains keep improving for about 3 to 6 months, then remain stable for years. Natural ageing and new sun damage gradually continue, so sunscreen and occasional maintenance help preserve your result over time.
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CO2 laser is an ablative fractional resurfacing treatment using a 10,600 nm carbon-dioxide laser to vaporise microscopic columns of skin, removing damaged tissue and stimulating new collagen and elastin. Because the improvement comes from genuine structural remodelling rather than a temporary surface effect, its results are among the longer-lasting in non-surgical resurfacing.
Once collagen rebuilds over roughly 3 to 6 months, the smoother texture, softened acne scars, and reduced fine lines tend to stay. What CO2 laser cannot do is stop time: the skin keeps ageing, and fresh sun exposure creates new pigment and lines. So the corrected scars usually stay corrected, while overall ageing slowly continues on top.
At Reberry Clinic, CO2 laser is consultation-led, with the clinic’s doctors setting depth and density to your concern and skin tone, then planning realistic longevity and any maintenance. International patients are supported in English across our three Seoul-area locations (Gangnam, Myeongdong, Incheon Airport).
The 10,600 nm CO2 wavelength is absorbed by water, vaporising columns to a controlled depth and delivering heat that denatures old collagen and triggers a wound-healing cascade. Over the following weeks, fibroblasts lay down new type I and type III collagen, and the dermis reorganises, which is why visible improvement keeps building for 3 to 6 months after a single session. This new collagen is structural and persistent, so once a scar is filled or a line softened, that change does not simply reverse. Longevity then depends on biology and behaviour: intrinsic ageing reduces collagen by roughly 1 percent per year, and ultraviolet exposure accelerates breakdown. Patients who use daily sunscreen and avoid heavy sun typically keep their results far longer than those who do not, which is why aftercare is treated as part of the result, not an extra.
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The first 5 to 7 days remove damaged surface skin, giving early smoothness once flaking finishes.
New collagen forms over the next 4 to 12 weeks, when most of the scar and texture improvement appears.
Results typically reach their fullest at around 3 to 6 months as the dermis finishes reorganising.
The corrected texture then holds for several years, with natural ageing continuing slowly on top of it.
Many patients refresh with a session every 1 to 2 years or rely on sun care and skincare to extend results.
See representative outcomes from Reberry Clinic. Results build gradually and vary by individual; your plan is assessed at consultation.
The clinic’s doctors assess scar depth, skin tone, and goals, then explain how long your specific result is likely to last in English.
After numbing for about 30 to 45 minutes, the session takes roughly 15 to 30 minutes depending on the treated area.
Visible healing runs about 5 to 7 days, after which early smoothness appears before deeper change develops.
Improvement builds over 3 to 6 months as collagen remodels, then stabilises into the long-lasting result.
Daily sunscreen, good skincare, and an occasional session every 1 to 2 years help preserve results.
CO2 laser results often last several years because the improvement comes from real collagen remodelling, not a surface effect. Scar and texture gains keep building for about 3 to 6 months, then stay stable. Natural ageing and new sun damage continue slowly, so this is a lasting improvement rather than a one-time fix.
Early smoothness appears once flaking finishes around day 5 to 7, but the full result builds over 3 to 6 months as new collagen forms. Acne scars and texture continue refining across that window. Your doctor reviews progress over the months and can plan further sessions if deeper correction is wanted.
Yes, a planned series of 1 to 3 sessions usually produces a deeper, more durable correction than a single pass, especially for pronounced scarring. Each session adds collagen and refines texture further. Your doctor confirms how many you need at consultation. You can compare options on our laser treatment page.
Unprotected sun exposure is the biggest factor, since ultraviolet light breaks down newly formed collagen and creates fresh pigment and lines. Smoking and skin ageing also shorten longevity. Diligent sunscreen and good skincare, outlined on our skin care page, meaningfully extend how long your result holds.
Many patients enjoy results for years and only repeat every 1 to 2 years for maintenance, while others top up sooner if ageing or new sun damage accumulates. There is no fixed schedule; it depends on your skin and goals. Your doctor advises based on how your collagen and concerns evolve.
CO2 laser produces long-lasting structural change, but it is not a permanent stop to ageing. The scars or texture it corrects usually stay corrected for years, yet the skin keeps ageing and can form new lines or pigment over time. Think of it as durable improvement maintained with sun care, not a one-time fix.
Treated acne scars do not regrow, because the collagen filling them is permanent structural tissue. However, new active acne can create fresh scars if breakouts continue, so managing ongoing acne matters. Controlling active breakouts, sometimes alongside acne treatment, helps protect the result you achieve.
With numbing cream for about 30 to 45 minutes, most patients feel heat and prickling rather than sharp pain, and comfort does not affect how long results last. Longevity depends on collagen and sun care, not on the discomfort level. Deeper settings may feel stronger but also tend to give more durable correction.
Expect redness and fine flaking for about 5 to 7 days; only after that does early smoothness show, with the true result emerging over 3 to 6 months. Judging too early underestimates the outcome. Your doctor schedules a review once collagen has had time to remodel so expectations stay realistic.
Daily broad-spectrum sunscreen, strict sun avoidance for weeks after treatment, gentle skincare, and not smoking all preserve the new collagen. Completing the recommended session series also matters. A consistent routine, like the one on our skin care page, is the single biggest lever on longevity.
Yes, after healing, gentler maintenance treatments or collagen-supporting care can prolong the smooth result, but they are spaced so the skin is never overstressed. A periodic hydrating facial supports the barrier between deeper sessions. Your doctor sequences everything around your healing and longevity goals.
No, longevity varies with skin type, scar depth, age, sun habits, and how many sessions you complete. Younger skin with strong collagen and diligent sun care tends to hold results longest. A consultation gives a realistic estimate, and you can review the full laser treatment options first.
Plan about 3 to 5 days so you can have a consultation, the treatment, and an early review before the most visible flaking. Since the full result takes 3 to 6 months, you can assess longevity from home. Our English-speaking team helps coordinate timing around your travel schedule.
Yes, flying within a day or two is generally fine, and the result will continue developing over 3 to 6 months wherever you are. Keep skin moisturised and protected from sun while travelling, as sun is the main threat to longevity. Your doctor confirms timing based on the depth used.
International patients can assess CO2 laser results at home over the 3 to 6 month window, with remote check-ins in English to review progress. Maintenance sessions every 1 to 2 years can be planned around future trips, and your treatment notes are kept on file so any repeat builds on your previous result.
| Fractional CO2 Laser | Non-ablative Fractional Laser | Microneedling RF | |
|---|---|---|---|
| Energy / mechanism | Ablative 10,600 nm, vaporises micro-columns | Heats dermis without removing surface | Radiofrequency via micro-needles into dermis |
| Best for | Deeper scars, lines, marked texture | Mild texture and tone, minimal downtime | Texture, pores, mild laxity |
| Results timeline | Builds over 3 to 6 months | Gradual over several sessions | Builds over 2 to 3 months |
| How long results last | Often several years for corrected scars | Often a year or more, milder change | Often 1 to 2 years, milder change |
| Downtime | About 5 to 7 days | Little to none | Usually 1 to 3 days |
| Sessions | Often 1 to 3 | Typically 3 to 5 or more | Typically 3 to 4 |
| Cost factors | Depends on area, depth, and session count | Depends on area and session count | Depends on area and session count |
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