Laser Skin Resurfacing: A Review

Overview · The two families · Fractional technology · Recovery · Preparation and skin type · Complications · Choosing a device · Controversies · Evidence · Related articles · question library below

Laser skin resurfacing uses focused light to remove or heat the outer layers of skin so that fresh, more even skin regrows in their place. It is one of the most effective non-surgical tools for fine wrinkles, sun damage, uneven pigment, and acne scars, and it is also one of the most misunderstood, because the word "laser" covers a wide range of devices whose results and recovery differ enormously. The single most useful thing a patient can understand before treatment is that depth, results, and downtime rise together: the treatments that change the skin most are the treatments that ask the most of your calendar and carry the most risk. There is no setting that delivers dramatic change with no recovery, and any marketing that promises one deserves skepticism.

Resurfacing improves the surface and texture of skin. It does not lift sagging tissue or remove excess skin, so it is a complement to, not a replacement for, procedures such as a facelift or eyelid surgery. Many people combine the two: surgery repositions tissue, resurfacing refines the skin envelope over it.

Nearly every resurfacing laser belongs to one of two families, and the distinction drives everything that follows.

Ablative lasers (carbon dioxide at 10,600 nm and erbium:YAG at 2,940 nm) vaporize the outer skin, removing tissue layer by layer and triggering a robust wound-healing and collagen response. They produce the most pronounced improvement in deep wrinkles, significant sun damage, and atrophic acne scars, and they ask for the most recovery. Carbon dioxide is the more powerful and traditionally the deeper of the two; erbium is gentler and heats surrounding tissue less, which can mean a somewhat faster recovery at the cost of a less pronounced tightening effect.

Non-ablative lasers (and related light devices) heat the deeper dermis to stimulate collagen while leaving the surface layer intact. Recovery is far shorter, often a few days of redness, but each session does less, so a course of several treatments is usually needed and the ceiling of improvement is lower. They suit early aging, mild texture and pigment concerns, and patients who cannot take extended time away.

The most important advance in resurfacing was fractional delivery, introduced in the mid-2000s. Instead of treating the entire surface, a fractional laser treats microscopic columns of skin and deliberately leaves untouched skin between them. Those spared islands act as reservoirs of healthy cells that speed healing, so fractional treatment brought much of the power of resurfacing with a fraction of the recovery and risk of the old fully ablative approach.

Both families now come in fractional versions. Fractional non-ablative devices are the workhorses of gradual, low-downtime improvement. Fractional ablative carbon dioxide sits at the powerful end of what can be done in a single session, and fully (non-fractional) ablative resurfacing, once the standard, is now reserved for select cases because its results, while strong, come with the longest recovery and the highest risk of pigment change and scarring.

Recovery scales directly with how deep the treatment went. After non-ablative treatment most people have redness and mild swelling for a few days and can wear makeup and return to work quickly. After ablative treatment the skin is an open wound that must re-form its surface, which typically takes about one to two weeks of meticulous wound care, ointment, and avoiding the sun, followed by weeks to months during which lingering pinkness gradually fades. Deeper carbon dioxide resurfacing can leave the skin flushed for months, and this prolonged redness is expected healing, not a complication.

Diligent sun protection is not optional after any resurfacing. Freshly healed skin is highly vulnerable to the sun, and unprotected exposure is the most common avoidable cause of the blotchy pigmentation that disappoints patients. Good aftercare and sun avoidance are as much a part of the result as the laser itself, which is a theme across cosmetic surgery recovery generally.

The most consequential preparation question in resurfacing is your skin type. The Fitzpatrick scale, which grades skin from very fair to deeply pigmented by how it responds to sun, predicts the main pigment risks. Darker skin types carry a meaningfully higher risk of post-inflammatory hyperpigmentation, a darkening of the treated area that can last months, and this reality shapes device choice: for richly pigmented skin many experienced physicians favor gentler, non-ablative settings, careful test spots, and often a course of skin preparation beforehand rather than aggressive ablation. Resurfacing can be done safely across skin tones, but not with a one-setting-fits-all approach, and a provider who does not discuss your skin type before choosing a device is skipping the single most important safety step.

Because ablative and deeper fractional treatments can reactivate the cold-sore virus even in people with no history of it, antiviral medication is commonly prescribed around the procedure. Active infection, recent isotretinoin use, a tendency to keloid scarring, and a fresh tan are all reasons to delay. Honest disclosure of your history is part of a safe result.

• Prolonged redness: common and usually expected after deeper treatments, fading over weeks to months.
• Post-inflammatory hyperpigmentation: darkening of the treated skin, more likely in darker skin types and after sun exposure, usually temporary but sometimes persistent and requiring treatment.
• Hypopigmentation: a lightening of the skin that can appear months to years after aggressive ablative resurfacing and can be permanent. It is one of the strongest reasons deep fully ablative treatment is now used selectively.
• Infection: bacterial, viral (reactivated cold-sore virus), or fungal, which is why prophylaxis and clean wound care matter.
• Scarring: uncommon with appropriate settings but a real risk with overly aggressive treatment or poor healing, particularly off the face where skin heals less favorably.
• Sharp demarcation lines between treated and untreated areas, which careful feathering aims to avoid.

Most of these risks are reduced, though never eliminated, by matching the device and depth to the skin type and by disciplined aftercare. Signs of spreading redness, pain, pus, or fever after treatment are reasons to contact your provider promptly: emergency guidance.

There is no single best laser, only the right laser for a given goal, skin type, and tolerance for downtime. Deep wrinkles and significant acne scarring generally respond best to ablative or fractional ablative treatment; mild texture, early lines, and pigment often do well with a series of non-ablative or light-based sessions; pigment and redness specifically are sometimes better addressed by intense pulsed light or pigment-selective devices than by resurfacing at all. The evidence supports each of these tools in its lane rather than crowning one device superior across the board, and the honest consultation matches the device to the problem instead of applying a favorite machine to every face.

Experience of the operator matters as much as the brand of laser. The same device produces excellent or poor results depending on the settings chosen and the judgment behind them, which is why device marketing is a weak basis for choosing a provider.

Marketing of brand-name devices

Resurfacing is a heavily branded field, and clinics often market a specific machine as though the name guarantees the result. The evidence supports categories of technology matched to specific problems more than it supports any single trademarked device as universally best. The useful questions are what family of laser is being used, at what depth, and why that choice fits your skin and goal.

How much can resurfacing tighten skin

Devices are frequently promoted for skin tightening. Resurfacing and energy treatments do stimulate some collagen and can modestly improve mild laxity, but they do not reproduce the effect of surgically removing and repositioning tissue. Patients with meaningful sagging are often better served, and sometimes disappointed by resurfacing marketed as a surgery substitute, a point that also applies to thread lifts and other non-surgical lifting claims.

Home and low-power devices

Consumer and low-energy in-office devices are gentler and safer but correspondingly less effective; they are better understood as maintenance than as a substitute for medical resurfacing.

• Grade A: general principles of reducing post-procedure scarring and supporting skin healing, which apply directly to resurfacing aftercare.
• Strong external base (not graded here): the efficacy of ablative and fractional resurfacing for photoaging and acne scarring, and the elevated pigment risk in darker skin types, rest on a large clinical and dermatologic literature and society guidance.

Graded claims link to cited answers below. Dedicated spokes on fractional versus fully ablative recovery and on resurfacing in skin of color are in the publishing queue.

Scar Management: A Review · Injectables (Botox and Fillers): A Review · Facelift: A Review · Facial Fat Transfer: A Review · Recovery After Cosmetic Surgery: A Review.

The complete question library for this topic follows below.