CO2 Laser

Information about CO₂ laser

Fractional CO₂ laser acts on two levels: superficially and at a deeper dermal level. Its mechanism of action consists of creating microscopic channels in the upper layers of the skin, producing controlled resurfacing that renews the skin surface. At the same time, it generates a deeper thermal effect that stimulates the production of new collagen.

Comprehensive facial rejuvenation

The traditional approach to skin rejuvenation with fractional CO₂ laser involves the use of moderate to high treatment intensities in order to achieve clinically significant results. This is associated with a recovery period of several days, during which the skin becomes red, a degree of inflammation may occur, and small blisters can develop. This is followed by peeling and the emergence of new skin that is smoother and more luminous.

At a deeper level, from the moment of treatment, this laser stimulates collagen and elastin production. Improvement is progressive and remains clinically significant for approximately four to six months, at which point the need for additional sessions may be assessed.

Flash effect with CO₂ laser

Newer and more versatile fractional CO₂ laser systems allow treatment at lower intensities. This makes it possible to adapt the procedure to younger patients, individuals without marked sun damage, or those seeking to improve skin appearance ahead of a specific event. In these cases, a mild rejuvenating effect — commonly referred to as a “flash effect” — can be achieved.

The intensity at which the fractional CO₂ laser is applied primarily affects recovery time, which can range from a few hours, with mild facial redness, to a maximum of 7–10 days.

Except when performed gently for an immediate cosmetic effect, fractional CO₂ laser is considered a seasonal procedure and should be avoided during periods of high sun exposure. After treatment, strict photoprotection measures must be followed to reduce the risk of pigmentation changes.

This treatment is generally well tolerated. To minimise discomfort, topical anaesthesia applied by the patient 30–60 minutes before the session is recommended.

“The Laser Unit at Grupo Pedro Jaén works with advanced laser systems used in dermatological practice”

Suitable for face and body

A fractional CO₂ laser session typically lasts between five and fifteen minutes, depending on the area treated. During the procedure, patients may experience a sensation of heat, stinging or itching, with intensity varying according to the treatment parameters selected and the therapeutic objectives defined for each patient.

When topical anaesthesia is not sufficient, this laser treatment can be performed in our Pain-Free Aesthetic Treatments Unit, using light conscious sedation. Sedation is administered and continuously monitored by an anaesthetist, helping to minimise discomfort and facilitate recovery.

More information

The authorship of this page is provided below.

Grupo Pedro Jaén is a medical group founded more than three decades ago with the aim of providing medical, surgical and aesthetic solutions related to skin health and appearance. Led by Dr Pedro Jaén, the group has a highly specialised medical team that covers every area of care with top-level specialists, carries out extensive training activities, is a leader in medical research, and operates several clinics in Madrid, from which it offers the highest standards of care and clinical excellence to all patients.

In the Grupo Pedro Jaén Press Room you can find information, advice and news related to dermatology, aesthetic medicine, trichology and general health. The group’s journals are also shared through an online platform, along with updates on the activity and media appearances of our clinics and healthcare professionals.