Ablative laser resurfacing is a skin treatment that uses concentrated light energy to vaporize the outer layers of damaged skin, prompting the body to replace them with fresh, smoother tissue. It is the most aggressive form of laser resurfacing available, producing the most dramatic improvements in wrinkles, scars, and sun damage, but also requiring the longest recovery time.
How Ablative Lasers Remove Skin
The word “ablative” means the laser destroys and removes tissue rather than working around it. The laser emits light at a wavelength that water molecules in your skin cells absorb intensely. That absorbed energy heats the water so rapidly that the cells vaporize, layer by layer, in controlled passes. Each pulse removes roughly 20 to 30 micrometers of tissue (thinner than a sheet of paper), and the practitioner can make multiple passes to reach the desired depth.
The vaporization also generates a zone of heat in the tissue just beneath the treated area. This thermal injury is actually part of the point: it triggers a wound-healing response that stimulates your body to produce new collagen. Over the following weeks and months, that new collagen tightens and restructures the deeper layers of skin, which is where the long-term smoothing effect comes from.
The Two Main Laser Types
Two lasers dominate ablative resurfacing, and they differ mainly in how precisely they cut and how much heat they leave behind.
The carbon dioxide (CO2) laser operates at a wavelength of 10,600 nanometers. Skin absorbs this wavelength well, but the energy spreads into a layer about 15 to 20 micrometers thick. That means each pulse leaves a residual thermal damage zone of roughly 80 to 150 micrometers. The upside is more collagen stimulation and more dramatic tightening. The downside is a longer, more uncomfortable recovery.
The erbium YAG laser operates at 2,940 nanometers, a wavelength that water absorbs about 12 to 15 times more efficiently than the CO2 wavelength. The energy concentrates into a layer only about 1 micrometer thick, so the laser ablates skin with far less heat damage to surrounding tissue (under 50 micrometers). This makes erbium treatments more precise and gentler, with faster healing, but generally less tightening per session than CO2.
What It Treats
Ablative resurfacing is used for a wide range of skin concerns. The most common reasons people seek it out are facial wrinkles from sun damage and aging, acne scars, and surgical or traumatic scars. It also treats precancerous rough patches (actinic keratoses), raised age spots (seborrheic keratoses), warts, skin tags, and an enlarged, bumpy nose caused by excess tissue (rhinophyma).
The procedure works best on the face, where the skin has a dense supply of oil glands and heals relatively quickly. Other body areas like the neck, chest, and hands can be treated, but healing is slower and the risk of scarring is higher because the skin there is thinner and has fewer glands to regenerate the surface.
Ablative vs. Non-Ablative Resurfacing
Non-ablative lasers leave the outer layer of skin completely intact. They heat the deeper layers to stimulate collagen without vaporizing anything on the surface. That means little to no downtime, minimal discomfort, and you can often return to normal activities the same day. The tradeoff is a more moderate result that typically requires multiple sessions to accumulate a noticeable change.
Ablative lasers strip away the surface entirely. The results are far more dramatic, often visible after a single treatment, but recovery takes weeks rather than days. A middle ground exists in fractional ablative lasers, which vaporize thousands of tiny columns of skin while leaving healthy tissue between them. This speeds healing considerably compared to a full-surface treatment while still delivering strong results.
Who Is a Good Candidate
People with lighter skin tones (Fitzpatrick types I through III) tend to have the safest and most predictable outcomes. The reason is biological: melanin in the skin absorbs laser energy. The more melanin present, the more the surrounding skin heats up alongside the targeted area, raising the risk of burns and pigment changes afterward.
For people with medium to dark skin (Fitzpatrick types IV through VI), ablative resurfacing carries a notably higher risk of post-inflammatory hyperpigmentation (dark spots) or hypopigmentation (light spots). Treatment is still possible in some cases, but it requires lower energy settings, lower treatment density, and often a course of skin-lightening cream before and after the procedure to reduce pigment complications. If you have darker skin and are considering ablative resurfacing, a practitioner experienced in treating your skin type is essential.
What the Procedure Feels Like
Ablative resurfacing is painful enough that some form of anesthesia is always used. For lighter or fractional treatments, a strong topical numbing cream applied 30 to 60 minutes beforehand may be sufficient. Deeper, full-face CO2 treatments often require nerve block injections around the face, IV sedation, or occasionally general anesthesia. Your practitioner will choose the approach based on the depth of treatment and the area being covered.
The procedure itself typically takes 30 minutes to two hours depending on the size of the treatment area. You may smell a faint burning odor and feel warmth or pressure even through the numbing.
Recovery Timeline
Recovery from ablative resurfacing follows a predictable pattern, though the exact timeline depends on whether you had a full-surface or fractional treatment and which laser was used.
Immediately after, your skin will be red, swollen, and feel intensely sunburned. Over the first few days, treated skin may appear raw, ooze a yellowish fluid, and occasionally blister. This is normal wound healing. Your practitioner will likely have you apply a semi-occlusive dressing or ointment to keep the area moist, which speeds the regrowth of new skin and reduces scarring risk. Keeping the wound covered and moist during this phase is one of the most important things you can do for your outcome.
Around days five to seven, the skin dries out and begins to peel. Underneath, new pink skin appears. This pink or reddish tone is the most visible sign that you’ve had work done, and it fades gradually. For most people, the redness lightens significantly over two to three months, but it can persist for six months to a full year in some cases. During this entire period, the new skin is extremely sensitive to UV light, and strict sun protection is critical to prevent permanent discoloration.
Risks and Side Effects
The most common side effect is prolonged redness, which occurs in roughly half of patients and is a normal part of healing rather than a complication. Pain or significant discomfort during the healing phase affects about a third of people. More concerning but less common, scarring and pigment changes (either darkening or lightening of the skin) each occur in roughly 12% of cases.
Infection is a risk with any procedure that removes the skin barrier. Bacterial and viral infections, particularly reactivation of the herpes simplex virus (cold sores), are the main concerns. Most practitioners prescribe antiviral medication before and after the procedure if you have any history of cold sores.
How Long Results Last
One of the strongest arguments for ablative resurfacing is the durability of results. A study following over 100 patients after CO2 laser resurfacing found that wrinkle improvement persisted at an average follow-up of two years, with some patients tracked out to nearly four years. Skin biopsies at those follow-ups showed that collagen remodeling was still actively improving deep in the skin even two years post-treatment, meaning the benefits were not just maintained but continued to develop.
That said, your skin will keep aging. Sun exposure, smoking, and genetics all influence how long your results hold. A single ablative session can reset the clock significantly, but it does not stop it. Most people find they can go years before considering a touch-up, and many never repeat the full procedure, instead maintaining results with gentler treatments like non-ablative lasers or chemical peels.