What Is Laser Skin Resurfacing?
Laser skin resurfacing is an advanced skin rejuvenation treatment that uses concentrated beams of light energy to precisely remove or heat layers of damaged skin, stimulating the body's natural healing response and triggering the production of fresh, new collagen. The result is smoother, firmer, more evenly toned skin with a reduction in wrinkles, scarring, pigmentation, and other signs of ageing and sun damage.
This guide focuses specifically on laser skin resurfacing, the ablative and non-ablative fractional technologies used to treat wrinkles, scarring, sun damage, and texture. Laser hair removal and laser treatment of vascular lesions (broken capillaries, spider veins, port-wine stains) use entirely different laser systems and are covered in separate treatment guides.
In Ireland, laser skin resurfacing is considered one of the most effective treatments for significant skin concerns that cannot be adequately addressed by topical skincare, chemical peels, or microneedling alone. It is performed by dermatologists, doctors, and specially trained practitioners using medical-grade laser systems in clinical environments.
The term "laser skin resurfacing" encompasses a range of technologies and approaches, broadly divided into two categories:
Ablative lasers (CO2 and Erbium:YAG) physically vaporise the outer layers of damaged skin, creating a controlled wound that heals with new, healthier skin. These lasers deliver the most pronounced results but require the most downtime and carry the highest risk profile.
Non-ablative lasers used for resurfacing include Erbium Glass (1550nm), Nd:YAG, and thulium lasers. They heat the deeper layers of the skin without removing the surface, stimulating collagen production from within. These offer a gentler approach with less downtime but typically require multiple sessions to achieve comparable results.
A further innovation, fractional technology, treats only a percentage of the skin surface (leaving microscopic columns of untreated skin between the treated zones), which dramatically speeds healing and reduces risk while still delivering excellent results. Most modern laser resurfacing in Ireland uses fractional technology, whether ablative or non-ablative. Fully ablative CO2 resurfacing is rarely performed in modern practice due to its extensive recovery and risk profile; fractional ablative is now the standard of care.
Laser skin resurfacing represents a significant investment in both cost and recovery time, but for the right candidate and the right concerns. It can deliver significant, long-lasting results that simpler treatments cannot match.
How Does Laser Skin Resurfacing Work?
The specific procedure varies depending on the type of laser used, but the general process follows these steps:
Pre-treatment consultation and preparation: A comprehensive consultation is essential. Your practitioner will assess your skin type (Fitzpatrick scale), the specific concerns to be addressed, your medical history, and your tolerance for downtime. They may prescribe a pre-treatment skincare regimen, often including a retinoid, and if indicated for pigmentation concerns, a prescription-only topical agent such as hydroquinone (available only on prescription in Ireland and the EU), alongside high-factor SPF, to prepare the skin for 2 to 4 weeks before the procedure.
Antiviral prophylaxis. For ablative laser resurfacing, prophylactic antiviral medication is typically prescribed routinely, regardless of cold sore history, because thermal injury can reactivate latent herpes simplex virus even in patients who have never had a visible outbreak. For non-ablative treatments, antivirals are usually prescribed only if you have a history of cold sores.
Eye protection. Laser treatment involves strict eye-safety protocols, you will wear protective goggles during treatment, and for periorbital (around-the-eye) procedures, specialised corneal shields are placed under the eyelids to fully protect the eyes from the laser beam.
On the day of treatment:
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Anaesthesia: The skin is cleansed and anaesthesia is applied. For non-ablative treatments, topical numbing cream is usually sufficient. For ablative treatments, stronger anaesthesia is used, this may include topical anaesthetics, nerve blocks, or in some cases light oral sedation.
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Laser application: The practitioner passes the laser handpiece across the treatment area in a precise, systematic pattern. For fractional lasers, the device creates thousands of microscopic treatment zones (microthermal zones) in the skin:
- Ablative fractional (e.g., CO2 or Erbium:YAG): The laser vaporises tiny columns of skin tissue from the surface down into the dermis. The surrounding untreated tissue provides a reservoir of healthy cells to aid rapid healing.
- Non-ablative fractional (e.g., Erbium Glass 1550nm): The laser heats columns of tissue in the dermis without breaking the skin surface, causing controlled thermal injury that stimulates collagen remodelling.
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Cooling and soothing: Cooling devices (cold air or contact cooling) may be used during treatment to enhance comfort and protect the epidermis. After the procedure, a soothing ointment, hydrating mask, or healing balm is applied.
The healing response: The controlled thermal injury triggers the body's wound-healing cascade. Over the following weeks and months, damaged collagen is replaced with new, organised collagen fibres. Pigmentation in the treated areas is broken down and gradually cleared from the skin. New, healthy epidermis forms from the base of the microthermal zones and the surrounding untreated skin. The result is tighter, smoother, more evenly pigmented skin with improved firmness and elasticity.
The full extent of collagen remodelling continues for 3 to 6 months after treatment, meaning results continue to improve well beyond the initial healing period.
Post-treatment skincare. Strict avoidance of active ingredients (retinoids, AHAs, BHAs, vitamin C) is essential for 2 to 4 weeks after treatment. Gentle bland cleansers, petroleum jelly or a specialised post-procedure balm, and broad-spectrum SPF 50 are the mainstays of aftercare. Strict sun protection, SPF 50 daily and avoidance of direct sun exposure where possible, is required for at least 4 to 6 weeks after treatment, and ongoing daily SPF is essential to protect results and prevent post-inflammatory hyperpigmentation, which can persist for months.
