What Is Fractional CO2 Laser Skin Resurfacing
Sep 21, 2026
Fractional CO2 laser skin resurfacing is a laser-based skin treatment designed to improve skin texture, uneven tone, wrinkles, acne scars, enlarged pores, and other visible signs of skin damage. It uses a carbon dioxide (CO2) laser, typically emitting at 10,600 nm, to create controlled microscopic treatment zones in the skin.
Unlike traditional full-field CO2 resurfacing, fractional treatment does not remove the entire surface of the treated area. Instead, the laser creates tiny columns of controlled thermal injury while leaving surrounding skin untreated. These untreated areas can support the skin's natural healing process and allow fractional treatments to be used with a generally shorter recovery period than fully ablative resurfacing.
How Does Fractional CO2 Laser Resurfacing Work?
The CO2 laser delivers infrared energy that is strongly absorbed by water in the skin. When the laser energy reaches the target tissue, it produces controlled vaporization and thermal effects.
In fractional treatment, the energy is delivered in a pattern of microscopic spots or columns rather than across the entire treatment area.
This process has two main effects:
Resurfacing: The laser removes precisely controlled portions of damaged or aged superficial skin.
Remodeling: Heat delivered into the surrounding tissue stimulates a wound-healing response and encourages the formation and remodeling of collagen.
As new skin develops and collagen remodeling continues, the treated area may gradually appear smoother and more even.
What Skin Concerns Can It Address?
Fractional CO2 laser resurfacing is commonly used in professional aesthetic and dermatology settings for a range of skin concerns, including:
1. Acne Scars
Fractional CO2 treatment can be used to improve the appearance of certain atrophic acne scars. The controlled laser columns create microscopic treatment zones within scarred tissue, helping initiate a remodeling response.
Results depend on scar type, depth, skin characteristics, and treatment settings. Deeper or more complex scars may require a combination of treatments rather than laser resurfacing alone.
2. Fine Lines and Wrinkles
CO2 laser resurfacing can improve the appearance of fine lines and photoaged skin. Collagen remodeling can continue for weeks or months following treatment, so improvements are not necessarily limited to the immediate healing period.
3. Uneven Skin Texture
Sun exposure, aging, acne, and other factors can contribute to rough or irregular skin texture. Fractional resurfacing removes microscopic areas of damaged tissue and encourages the development of smoother-looking skin.
4. Enlarged Pores
By improving overall skin texture and stimulating collagen remodeling, fractional CO2 treatments may help reduce the visible appearance of enlarged pores.
5. Photodamaged Skin
Fractional CO2 resurfacing can be incorporated into treatment plans for visible signs of photoaging, including uneven texture, fine lines, and certain pigmentation concerns.
What Happens During a Treatment?
A typical professional treatment begins with skin cleansing and preparation. Depending on the treatment area and intensity, a topical anesthetic may be used to improve patient comfort.
The practitioner then selects treatment parameters based on factors such as:
Skin type and condition
Treatment area
Scar or wrinkle depth
Desired treatment intensity
Patient tolerance
Previous treatments
Expected downtime
The laser handpiece is moved across the treatment area, delivering fractional energy according to the selected pattern.
Treatment duration varies according to the size of the area being treated and the equipment settings.
What Is Recovery Like?
Fractional CO2 resurfacing is an ablative laser treatment, so some degree of redness, swelling, sensitivity, peeling, or crusting can occur after treatment. The intensity and duration of these effects depend heavily on the treatment parameters and the individual.
During recovery, professional aftercare commonly focuses on:
Keeping the treated area clean
Following the provider's wound-care instructions
Avoiding unnecessary sun exposure
Using appropriate sun protection after the skin has sufficiently recovered
Avoiding picking or scratching peeling skin
Temporarily avoiding irritating skincare products when advised
Recovery is generally influenced by how aggressively the skin is treated. A lower-density treatment may involve less downtime than a more intensive resurfacing procedure.
Fractional CO2 vs. Traditional CO2 Resurfacing
The major difference is the treatment pattern.
Traditional full-field CO2 resurfacing treats a continuous area of skin, which can produce significant resurfacing effects but generally involves more extensive healing.
Fractional CO2 resurfacing treats microscopic columns while leaving untreated areas between them.
| Feature | Fractional CO2 | Full-field CO2 |
|---|---|---|
| Treatment pattern | Microscopic treatment zones | Continuous treatment area |
| Surrounding tissue | Partially preserved | More extensively treated |
| Typical recovery | Generally shorter | Generally longer |
| Treatment intensity | Adjustable | Often more extensive |
| Common applications | Scars, texture, wrinkles, photoaging | More intensive resurfacing |
The appropriate approach depends on the patient's skin condition and the treatment objective.
Is Fractional CO2 Laser Resurfacing Suitable for Everyone?
No. Laser resurfacing requires individual assessment.
Skin type, history of abnormal scarring, active skin conditions, recent tanning, medications, previous procedures, and other factors can affect treatment suitability and risk.
People with darker skin tones may have a higher risk of post-inflammatory hyperpigmentation after ablative laser procedures. Careful parameter selection and appropriate patient assessment are therefore particularly important.
A qualified medical professional should determine whether fractional CO2 resurfacing is appropriate and which treatment settings should be used.
Are There Side Effects?
Possible short-term effects include:
Redness
Swelling
Burning or warmth
Skin sensitivity
Peeling
Crusting
Temporary changes in pigmentation
Less common but more significant complications can occur, including infection, prolonged pigmentation changes, scarring, or delayed healing. Appropriate patient selection, treatment technique, equipment operation, and aftercare are important for reducing risks.
How Many Treatments Are Needed?
There is no universal number of treatments.
Some patients may seek a single intensive treatment, while others may choose a series of treatments using lower treatment intensity. The recommended interval and number of sessions depend on the condition being treated, the treatment settings, and the patient's response.
For acne scars and more significant texture concerns, multiple treatment sessions may be considered.
