Risks and important information
CO₂ laser resurfacing deliberately creates a controlled injury to the skin. It therefore involves downtime and carries potential risks and complications. The likelihood and severity of side effects vary with treatment depth and density, treatment area, skin type, medical history, medications, sun exposure, previous scarring and adherence to pre- and post-treatment instructions.
This document provides general patient information and does not replace an individual medical assessment, informed consent discussion or the specific advice provided by your treating clinician.
Expected treatment effects
- Redness and warmth.
- Burning, stinging or tenderness.
- Swelling, particularly around the eyes.
- Tightness and dryness.
- Bronzing or darkening of the treated surface.
- Pinpoint crusting.
- Flaking and peeling.
- Mild itching.
- Temporary sensitivity.
- Temporary worsening or darkening of pigmentation before it improves.
- Temporary acne-like eruptions or milia.
These effects may last from several days to longer depending on treatment intensity. Redness can persist after the initial healing phase, particularly after deeper resurfacing.
Pigment changes
- Post-inflammatory hyperpigmentation - temporary or occasionally persistent darkening.
- Hypopigmentation - lightening or loss of normal skin pigment.
- Uneven pigmentation or a visible difference between treated and untreated skin.
- Persistent or recurrent pigmentary change.
Pigmentary complications may be more likely after sun exposure and in some darker skin types. Strict sun protection and adherence to pre- and post-treatment instructions are important.
Burns and delayed healing
- Burns or excessive thermal injury.
- Blistering.
- Erosion or ulceration.
- Prolonged crusting.
- Delayed wound healing.
- Prolonged redness.
These complications may require additional treatment and can increase the risk of pigment alteration or scarring.
Infection
Disruption of the skin barrier can allow infection to occur. Possible infections include:
- Bacterial infection.
- Viral infection, including reactivation of herpes simplex/cold sores.
- Fungal infection.
- Patients with a history of cold sores should tell their clinician before treatment. Antiviral medication may be recommended when clinically appropriate.
- Scarring and textural change
- Persistent textural change.
- Atrophic or depressed scarring.
- Hypertrophic or raised scarring.
- Keloid scarring in susceptible individuals.
Risk may increase with infection, excessive treatment response, delayed healing, picking or scratching the treated skin, inappropriate products during recovery or failure to follow aftercare instructions.
Persistent redness
Redness may last longer than anticipated. Following more intensive treatment, persistent erythema can continue for weeks and, uncommonly, longer.
Acne, milia and skin reactions
Temporary acne flares or milia may develop during recovery. Skincare preparations, dressings, ointments or topical medications used during recovery may also cause irritation or allergic/contact dermatitis.
Eye injury
CO₂ laser energy can damage the eyes. Appropriate laser eye protection is mandatory for the patient and everyone present during treatment. Treatment close to the eyes may require additional protective measures.
Hair changes
Treatment in hair-bearing areas may occasionally alter hair growth or result in temporary or persistent reduction in hair in the treated area.
Treatment around the eyes
Swelling may be significant following periocular treatment. Rare complications of aggressive treatment around the eyelids can include scarring or alteration of the normal eyelid position.
Unsatisfactory or incomplete cosmetic outcome
- Less improvement than anticipated.
- Uneven improvement.
- Persistence of the original concern.
- Recurrence of pigmentation or sun-related change.
- Need for additional treatments.
- Need for treatment using another modality.
Factors that may affect suitability
- Pregnancy when treatment is elective and cosmetic.
- Active infection or cold sores in the treatment area.
- Open wounds or active inflammatory skin disease.
- Recent significant sun exposure or tanning.
- Certain medications.
- A history of abnormal or keloid scarring.
- Conditions associated with impaired healing.
- Poorly controlled medical conditions.
- Inability to follow aftercare or sun-avoidance recommendations.
- This list is not exhaustive. Your clinician will determine your individual suitability.
When to contact PMAC
Please contact the clinic promptly if you develop:
- Increasing rather than improving pain.
- Marked or worsening swelling.
- Spreading redness.
- Pus or unusual discharge.
- Fever or feeling systemically unwell.
- Blisters or clusters of small painful lesions.
- Areas that appear increasingly raw or are not healing as expected.
- Significant or concerning pigment change.
- Eye pain or visual disturbance.
- Any reaction that concerns you.
Important
Choosing to undergo CO₂ laser resurfacing should be based on an informed discussion about expected benefits, limitations, downtime, alternative treatment options and potential complications. Your individual treatment plan and risk profile will be discussed before proceeding. Individual results vary and no specific cosmetic outcome can be guaranteed.