CO2 fractional laser is an ablative laser treatment that creates controlled microscopic columns of heat within the skin. Rather than treating the entire skin surface, the laser targets evenly spaced microscopic areas while leaving surrounding tissue intact. This controlled process is designed to support the skin’s natural healing response and stimulate collagen remodelling.
CO2 fractional laser is an intensive dermatological procedure. Suitability for treatment should be determined by assessing the patient’s skin type, the condition being treated, the depth and type of scarring, the risk of pigmentation changes, and any previous treatments.
Following a dermatological examination, CO2 fractional laser may be considered for:
Atrophic acne scars
Certain surgical or traumatic scars
Fine lines and signs of sun damage
Uneven skin texture and enlarged pores
Certain hypertrophic scars
Reducing the appearance of stretch marks in suitable patients
Selected superficial skin lesions considered suitable by a dermatologist
Not every scar or pigmentation concern is suitable for CO2 fractional laser treatment. The type of acne scar—such as ice-pick, boxcar, or rolling scars—can influence the treatment approach.
For some deep or tethered scars, fractional laser treatment alone may not be sufficient. A combination approach involving subcision, TCA CROSS, microneedling, or other procedures may be recommended.
Particular care is needed in patients with pigmentation conditions such as melasma or post-inflammatory hyperpigmentation. Inappropriate patient selection or excessive energy settings may make pigmentation darker or more noticeable.
Before treatment, the skin is cleansed and a topical anaesthetic cream is usually applied. The laser’s energy level, pulse duration, treatment density, and number of passes are adjusted according to the area being treated, the type and depth of scarring, and the patient’s skin characteristics.
Patients may experience warmth, stinging, or a burning sensation during the procedure. Treatment time varies depending on the size of the area.
Higher energy settings do not necessarily produce better results. Excessive energy can increase the risk of burns, pigmentation changes, prolonged healing, and scarring.
The number of sessions depends on the condition being treated, the type and depth of the scars, the patient’s skin type, the treatment settings, and the skin’s response.
Some patients may notice improvement after a single session, while others may require several sessions with sufficient healing time between treatments.
Because collagen remodelling develops gradually, the final results are not immediate. Treatment may reduce the appearance of scars, but complete or permanent removal cannot be guaranteed.
Redness, warmth or burning, swelling, sensitivity, pinpoint crusting, and peeling may occur after CO2 fractional laser treatment. These effects may last for several days or longer, depending on the intensity of the procedure and the patient’s skin characteristics. In some patients, redness may persist for a longer period.
During recovery, the skin should be kept clean and any crusts should be allowed to fall away naturally. Skincare products should be used as recommended by the dermatologist.
Careful sun protection and regular use of a suitable sunscreen are important for reducing the risk of post-treatment pigmentation. Exfoliating products, retinoids, acid-based cosmetics, and other potentially irritating treatments should be avoided until the skin has fully healed.
CO2 fractional laser is a medical procedure and is not entirely risk-free. Possible side effects and complications include:
Prolonged redness and sensitivity
Temporary or permanent changes in skin colour
Post-inflammatory hyperpigmentation
Infection or reactivation of cold sores
Acne-like breakouts or milia
Delayed healing
Scarring in rare cases
The risk of pigmentation changes may be higher in patients with darker skin types. Treatment settings must therefore be selected carefully, and sun protection instructions should be followed closely after the procedure.
Treatment may need to be postponed in patients with an active skin infection, open wounds, active cold sores, or inflamed acne in the treatment area.
Patients should inform their dermatologist about any history of keloid scarring, impaired wound healing, immune system disorders, current medications, recent procedures, and relevant medical conditions.
The decision to proceed should be based not only on the skin concern itself but also on a comprehensive assessment of the patient’s general health and individual risk factors.
At Dr. Armin Müştak’s dermatology practice in Çankaya, Ankara, patients undergo a dermatological assessment before CO2 fractional laser treatment. This assessment considers skin type, the nature and depth of acne scars, the risk of pigmentation changes, previous treatments, medical history, and treatment expectations.
For suitable patients, the laser settings and treatment plan are tailored individually.
Fractional CO₂ laser treatment creates microscopic treatment zones in the skin to stimulate controlled renewal. Areas of untreated skin remain between these zones, helping support the healing process.
As the skin heals, collagen production and remodeling are stimulated. The goal is to improve skin texture and reduce the appearance of scars and wrinkles. Treatment depth and intensity are adjusted according to the patient’s skin and individual needs.
Fractional CO₂ laser treatment is commonly used for depressed acne scars, certain surgical and traumatic scars, fine lines, and changes in skin texture caused by sun damage. Treatment is selected according to the specific concern and the individual’s skin characteristics.
Because different types of acne scars may occur together, fractional CO₂ laser treatment may need to be combined with other procedures. The goal is to improve the appearance of scars rather than guarantee their complete removal.
The number of sessions depends on the concern being treated, the depth of the scars, the treatment intensity, and the skin’s response. One session may provide sufficient improvement for some patients, while multiple sessions may be needed, particularly for scar treatment.
Sessions are usually scheduled at least six to eight weeks apart, although longer intervals may sometimes be recommended. Surface healing occurs sooner, but improvements related to collagen remodeling develop gradually over several months.
A sensation of heat, burning, or stinging may occur during the procedure. Appropriate anesthesia methods are used on the treatment area to help minimize discomfort.
Redness, swelling, tenderness, and crusting may develop afterward. Initial healing usually takes about one week but may exceed 10 days following more intensive treatment. Redness can persist for longer. The time needed to return to normal daily activities depends on the treatment intensity and the area treated.
Suitability should be determined through a dermatologic evaluation. The risk of post-treatment darkening is higher in people with darker skin tones or skin prone to hyperpigmentation.
Other possible risks include prolonged redness, skin lightening, infection, cold sore reactivation, and permanent scarring. Active infections, recent tanning, and conditions that affect wound healing may change or delay the treatment plan. Selecting appropriate settings for the patient’s skin type and following proper aftercare instructions can help reduce these risks.
Avoid sun exposure and tanning beds before treatment. Inform your physician about all medications you take, as well as any history of cold sores or raised scars.
After the procedure, follow the recommended cleansing and moisturizing routine, and do not pick or remove any crusts. Avoid makeup and potentially irritating products until the skin has healed. Physical sun protection is essential, and sunscreen should be introduced once the skin is ready. Aftercare instructions are personalized according to the intensity of the treatment.
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