Erbium Laser vs CO₂ Laser: Which Skin Resurfacing Is Right for You?
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When you’re researching laser skin resurfacing, two names dominate the conversation: the erbium YAG laser and the CO₂ laser. Both ablate damaged skin to trigger collagen renewal. Both deliver dramatic improvements in fine lines, scarring, sun damage and texture. But they’re engineered around different wavelengths, BBL Hero and Moxi by Sciton (on front page) that single technical difference cascades into very different profiles, comfort levels and safety margins.
At Centre for Surgery, our laser specialists use the Fotona SP Dynamis Pro erbium platform for all at our Baker Street private hospital. This guide explains how the two systems compare, when each is appropriate, and why Er:YAG is the right default choice for most patients in 2026.
The technical difference in one sentence
The CO₂ laser emits light at 10,600 nm; the Er:YAG laser at 2,940 nm. Water — the dominant component of skin — absorbs Er:YAG energy roughly 10 to 15 times more efficiently. That means Er:YAG vaporises water-rich tissue almost instantly with very little spillover heat, while CO₂ deposits more thermal energy into surrounding skin as it ablates the surface.
Both lasers achieve resurfacing; the trade-off is between depth of effect and severity of recovery. For the underlying tissue science in more detail, see our deeper guide to the .
CO₂ laser resurfacing: deep, dramatic, demanding
The CO₂ laser has been the benchmark for ablative resurfacing since the 1990s. Its longer wavelength penetrates further into the dermis, and the additional thermal effect stimulates substantial collagen contraction and remodelling. For patients with deep static wrinkles, severely sun-damaged skin or advanced atrophic acne scarring, a single fully ablative CO₂ session can produce that look genuinely transformative.
That power comes at a cost. CO₂ recovery typically runs 14 to 21 days of social downtime, with persistent erythema that can linger for weeks or months. The risk of post-inflammatory hyperpigmentation is — particularly in skin types IV to VI, where it can be both more prevalent and . Hypopigmentation, where treated skin loses pigment permanently, is a rare but documented complication. Because the thermal margin is wider, the technique demands an experienced operator: parameters that work beautifully on light, sun-tolerant skin can cause real harm on darker complexions or thinner areas like the neck.
For patients who tolerate the recovery and fall in the right candidacy window, CO₂ remains . For most patients, the calculation now favours erbium.
Erbium laser resurfacing: precise, safe, faster healing
The Er:YAG laser the same skin concerns from the opposite direction: vaporise tissue cleanly with minimal heat, and rely on a series of precisely controlled passes to reach the desired depth. With the Fotona SP Dynamis Pro, our can dial pulse duration anywhere from 100 microseconds (essentially cold ablation, almost no thermal effect) up to 1,000 microseconds (added thermal effect for collagen tightening). That tunability is the platform’s defining advantage — one device can deliver everything from a light texture refresh to deep collagen-stimulating resurfacing, with the clinician energy in real time to suit the area and the skin type.
The clinical consequences are tangible. Recovery typically runs five to ten days for fractional protocols and 10 to 14 days for fully ablative full-face. Redness fades faster. The pigmentation risk is markedly lower, making Er:YAG far safer in olive and darker skin tones. Discomfort is reduced, and many smaller treatments are tolerated under topical anaesthetic alone.
Er:YAG is also exceptional on delicate areas — around the eyes, on the neck, on the décolletage — where the higher thermal load of CO₂ creates a real risk of scarring or pigment loss.
Side-by-side: which laser for which problem
The honest answer is that the conditions overlap substantially. Both lasers can treat the same indications. What changes is the curve and the safety margin.
Recovery side-by-side
For deciding between the two approaches, the recovery comparison usually settles it.
For the full week-by-week recovery arc and detailed aftercare guidance, see our companion guide on . For makeup and skincare timing during the healing window, see our guide to . Many also ask — the short answer is that technique makes the procedure itself comfortable, but the first 48 hours of healing involves real but manageable soreness.
What happens during your treatment
Your first appointment is a consultation. We examine your skin, discuss what you want to change, take a thorough medical history, and recommend the laser protocol that best fits your concerns, skin type and downtime tolerance. If you’ve been using retinoids, are on or recently finished isotretinoin, or have a history of cold sores, we’ll adjust the plan accordingly.
On treatment day, the skin is cleansed and a topical anaesthetic cream is applied for around 30 to 45 minutes. Deeper protocols may add infiltrative local anaesthetic. Protective eye shields are placed. Treatment itself takes 30 to 90 minutes depending on the area and protocol. The sensation during is a warm tingling or mild stinging; immediately after, the skin feels like a moderate sunburn. A cooling mask and ointment are applied before you leave.
You go home with detailed written aftercare instructions: how to cleanse, what ointment to apply and how often, sun protection requirements, and warning signs to watch for. Strict daily SPF 50 use is essential for at least three months — the new skin is highly photosensitive and unprotected sun during this window can cause hyperpigmentation that’s hard to reverse.
Combining laser with other treatments
One of the reasons we lean towards Er:YAG is that it pairs well with other modalities for patients comprehensive rejuvenation:
For an overview of how Fotona’s range of treatments fits together, see our guide on .
Who is a good candidate
The ideal candidate for Er:YAG laser resurfacing:
Patients with significant skin laxity or volume loss may benefit more from lifting — , , — sometimes followed by Er:YAG to skin quality.
What we don’t recommend
A few honest editorial positions:
Frequently asked questions
Neither is universally better — they answer different questions. For most patients in 2026, Er:YAG offers a better balance of results, safety and recovery. CO₂ remains an option for very specific indications, but is rarely our first recommendation.
For most concerns, one to three fractional sessions spaced four to six weeks apart deliver results. Fully ablative full-face treatment is typically a one-off, with via non-ablative SMOOTH® treatments thereafter.
Surface can last five years or more. The natural ageing process continues, so maintenance treatments — non-ablative — extend benefit indefinitely.
Pricing depends on protocol depth and area. Focal resurfacing starts around £600; full-face ranges £1,500 to £3,000; fully ablative full-face £3,000 to £6,000. We offer .
It’s but rarely necessary. The dynamic range of the Fotona SP Dynamis Pro is wide enough that we can deliver everything from gentle refresh to deep ablation on one platform without bringing in a CO₂ system.
Our Baker Street private hospital is built around the Fotona SP Dynamis Pro — one of the most advanced Er:YAG platforms in clinical use. Treatments are delivered by experienced laser specialists in a CQC-regulated environment, with the full safety infrastructure of a private hospital. Every protocol is calibrated to your skin type, downtime tolerance and goals — there is no one-size-fits-all laser at our clinic.
Centre for Surgery · · GMC surgeons · · · ·
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Centre for Surgery is a CQC-regulated private hospital on London’s Baker Street, delivering plastic and cosmetic surgery through GMC-registered specialist surgeons. Our expertise spans facial procedures including and , , for men, and body contouring procedures such as and . Patient safety, surgical excellence and natural-looking results sit at the heart of everything we do.
Centre for Surgery is a CQC-regulated private on London’s iconic , offering plastic and surgery led by GMC-registered consultant surgeons.
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