The Complete Guide to CO2 Laser Skin Resurfacing

How fractional CO2 laser works

To understand CO2 laser resurfacing, it helps to understand the difference between ablative and non-ablative laser wavelengths and why combining them matters.

Ablative vs non-ablative wavelengths

An ablative laser removes (vaporises) tissue. The CO2 wavelength at 10,600nm is ablative: it targets water in the skin cells, causing rapid heating that vaporises the tissue in a precisely controlled manner. This removes damaged surface skin and triggers an intense wound-healing response in the deeper dermis, stimulating robust collagen and elastin remodelling. Ablative lasers produce the most significant results for scarring, deep texture irregularities and photodamage, but they also require the longest recovery.

A non-ablative laser heats tissue without removing it. Non-ablative wavelengths such as 1570nm penetrate the skin and create thermal injury zones in the dermis without disrupting the surface. This stimulates collagen production with less downtime, but the clinical effect per session is generally less dramatic than ablative treatment.

The Alma Hybrid difference: 10,600nm + 1570nm

The Alma Hybrid is the CO2 laser platform we use at Berkshire Aesthetics. What distinguishes it from traditional CO2 lasers is that it combines both the ablative CO2 wavelength (10,600nm) and a non-ablative 1570nm wavelength in a single device. During treatment, both wavelengths can be delivered simultaneously or sequentially, allowing the treating doctor to balance the intensity of surface removal with deeper thermal stimulation.

This dual-wavelength approach means the Alma Hybrid can achieve clinical results comparable to traditional fully ablative CO2 lasers while reducing the overall tissue disruption. In practical terms, this translates to a shorter and more manageable recovery period for patients, without sacrificing the depth of collagen remodelling that makes CO2 laser so effective. The treating clinician adjusts the ratio of ablative to non-ablative energy based on the patient’s skin type, the condition being treated and the desired balance between results and downtime.

Because the laser delivers energy in a fractional pattern — creating thousands of microscopic treatment zones separated by bridges of untreated skin — the surrounding healthy tissue acts as a reservoir for healing. This is why fractional CO2 heals faster than the older fully ablative approach, which treated 100% of the skin surface.

The consultation process at Berkshire Aesthetics

Every CO2 laser treatment at Berkshire Aesthetics begins with a thorough face-to-face consultation with Dr Selena Langdon. This is a medical assessment, not a sales appointment. The consultation serves several purposes:

• Clinical skin assessment — Dr Langdon examines your skin under clinical lighting, assesses your Fitzpatrick skin type, evaluates the specific concerns you want to address and determines whether CO2 laser is the most appropriate treatment for your presentation.
• Medical history review — A full medical history is taken, including current medications, previous treatments, any history of cold sores (herpes simplex), keloid scarring tendency and any conditions that might affect healing or suitability.
• Skin analysis — We may use our VISIA skin analysis system to provide an objective baseline assessment of your skin, documenting pigmentation, texture, pore size and UV damage before treatment begins.
• Treatment planning — If CO2 laser is appropriate, Dr Langdon will explain the recommended treatment parameters, the expected number of sessions, what results you can realistically expect and what the recovery will involve. If CO2 laser is not the best option for your concerns, she will recommend alternative treatments honestly.
• Informed consent — You will receive detailed written information about the procedure, its risks and aftercare requirements. You will have the opportunity to ask questions before giving your informed consent. We do not pressure patients to proceed on the same day as their consultation.

A consultation fee applies and is credited toward your treatment if you proceed within 28 days. This reflects the clinical time and expertise involved in a thorough assessment.

Recovery and downtime

Recovery from CO2 laser resurfacing requires planning. Most patients need 7–10 days of social downtime, during which the skin goes through a predictable healing sequence: redness and swelling peak in the first 2–3 days, followed by crusting and peeling from approximately days 4–7 as the treated skin sheds and new skin emerges beneath. By day 7–10, the new skin is typically intact but will remain pink for an additional 2–6 weeks. This residual pinkness is normal and can usually be covered with mineral-based makeup once the skin has fully re-epithelialised.

Key aftercare requirements during recovery include strict sun avoidance and daily broad-spectrum SPF 50 application, gentle cleansing with fragrance-free products, prescribed healing ointments and avoidance of active skincare ingredients such as retinoids, AHAs and BHAs until your doctor advises reintroduction. Strenuous exercise, saunas, swimming pools and hot baths should be avoided for at least 10–14 days.

We have written a comprehensive, day-by-day recovery guide covering everything you need to know about healing after CO2 laser treatment:

Results: what is realistic

One of the most important aspects of any aesthetic treatment is setting honest expectations. CO2 laser resurfacing produces significant, measurable improvement in skin quality — but it is not magic, and there are limits to what it can achieve.

What CO2 laser can achieve

• Significant improvement (typically 40–70%) in the depth and appearance of acne scars over a course of 2–3 sessions
• Visible reduction in fine lines, perioral lines and surface wrinkles
• Improved skin texture, smoothness and pore refinement
• Reduction in sun damage, age spots and uneven pigmentation
• Measurable tightening of mild to moderate skin laxity through collagen contraction and remodelling
• Fresher, more even skin tone as damaged surface layers are replaced by new skin

What CO2 laser cannot achieve

• Complete removal of deep scars — improvement is the realistic goal, not perfection
• A surgical facelift equivalent — CO2 laser tightens skin but cannot address significant excess tissue or advanced gravitational descent
• Permanent elimination of pigmentation without ongoing sun protection — pigmentation can return with UV exposure
• Prevention of future ageing — the biological ageing process continues after treatment

Timeline of results

Initial improvement in skin texture and tone is visible once the skin has healed, typically by week 2–3. However, the most significant changes occur between 6 weeks and 3 months as deep collagen remodelling progresses. Collagen synthesis continues for up to 6 months after treatment, meaning the full benefit of a session may not be apparent until several months later. Most patients require 1–3 sessions depending on the severity and nature of their concerns, spaced 6–8 weeks apart.

How CO2 laser compares to other treatments

Patients frequently ask how CO2 laser compares to other skin-resurfacing and rejuvenation treatments. The answer depends on your specific concerns, skin type, tolerance for downtime and treatment goals. We have written detailed comparison guides to help you understand the differences:

Choosing a clinic for CO2 laser treatment

CO2 laser resurfacing is a powerful medical procedure. The results it produces — and the safety of the experience — depend significantly on who performs the treatment and the clinical environment in which it is delivered. When choosing a clinic for CO2 laser, the following factors matter:

• CQC registration — In England, clinics providing certain aesthetic treatments should be registered with the Care Quality Commission (CQC). This means the clinic is subject to regulatory inspection and must meet recognised standards for clinical governance, infection control, equipment maintenance and patient safety. Berkshire Aesthetics is CQC-registered.
• Doctor-led care — CO2 laser should be performed or directly supervised by a qualified medical doctor with training and experience in laser resurfacing. Doctor-led care means you have access to someone who can assess your skin medically, manage complications if they arise and take clinical responsibility for your treatment outcomes. At Berkshire Aesthetics, all CO2 laser treatments are overseen by Dr Selena Langdon, our GMC-registered Medical Director.
• Honest assessment — A responsible clinic will tell you honestly if CO2 laser is not the right treatment for your concerns, rather than proceeding with an unsuitable treatment to secure a booking. Look for clinics that offer genuine consultations with a cooling-off period, not high-pressure sales appointments.
• Emergency protocols — The clinic should carry emergency medications and have protocols in place for managing adverse events. Staff should be trained in recognising and responding to complications.
• Aftercare access — Post-treatment access to clinical support is essential. You should be able to contact the clinic directly if you have concerns during your recovery, and follow-up appointments should be included as standard.

For more on what to look for when selecting an aesthetic clinic, read our guide to choosing an aesthetic clinic and our guide to doctor-led aesthetics.