How fractional CO₂ laser works
A fractional CO₂ laser delivers energy in spaced micro-columns. Some skin remains intact between these areas and contributes to the healing process. The aim is progressive skin remodelling; outcomes and the number of sessions vary according to the indication, lesion depth and individual response.
This information is general. Only a medical consultation can determine whether this treatment is appropriate for you.
Possible indications
Following an examination, the laser may be considered for certain acne scars, textural irregularities, wrinkles or fine lines, signs of photoageing and some other scars. Not all lesions respond in the same way, and another technique may be more appropriate.
The aim is improvement, without any guarantee of results. Any photographs shown can never predict another person’s response.
Experience and personalisation
Fractional ablative laser treatment requires knowledge of the skin, skin phototypes, healing and device settings. Dr Bosser assesses the area, phototype, medical history, current treatments, healing capacity and acceptable social downtime.
Power, density, depth and the number of passes are tailored to each situation. The consultation also explains alternatives, reasonably expected benefits, limitations, risks and follow-up.
Precautions before treatment
Tell the doctor about pregnancy or breastfeeding, herpes, an active infection or irritation, a tendency to develop thick scars, pigmentation disorders, any illness or treatment affecting healing, and any recent or current isotretinoin use. Never stop a treatment without medical advice.
Sun exposure and tanning increase the risk of pigmentation changes. Tanned, irritated or damaged skin may require the session to be postponed. Preparation, sun protection and, where necessary, antiviral prevention are prescribed individually.
Recovery, risks and follow-up
Warmth, redness, swelling, slight oozing, crusting or peeling may occur. Their intensity and the recovery period depend on the settings used and the treated area.
Possible risks include prolonged redness, a herpes flare, infection, hyperpigmentation or hypopigmentation and, more rarely, scarring. Strict sun protection and compliance with prescribed care are essential. Contact the practice if pain increases, discharge is unusual, you develop a fever or a reaction concerns you.
Sources and update
Page updated on 28 September 2026. Sources reviewed: Candela CO₂RE documentation and a literature review of fractional CO₂ laser treatment for acne scars.