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A comprehensive guide to laser resurfacing — ablative CO2 and erbium, fractional ablative and non-ablative (Fraxel, MOXI), the full downtime spectrum, and Fitzpatrick skin tone safety considerations.
· By MedSpot Editorial · 6 min read
Laser resurfacing is the category of laser treatments that deliberately damages the outer skin layers to stimulate new skin growth — improving texture, tone, wrinkles, scars, and sun damage. The spectrum runs from aggressive (full ablative, 2-week downtime) to gentle (non-ablative fractional, 2-day downtime). Here's how to navigate the options.
Ablative lasers vaporize the outer skin layer (epidermis) entirely in treated areas. Maximum results, maximum downtime.
Non-ablative lasers heat the dermis (deeper layer) while leaving the epidermis intact. Minimal downtime, progressive results over multiple sessions.
Fractional lasers (ablative or non-ablative) create microscopic treatment columns in a fraction of the skin area — leaving surrounding untreated "bridges" to accelerate healing. Fractional technology allows stronger treatments with less downtime than full-field ablative.
The gold standard for significant skin rejuvenation. CO2 (carbon dioxide, 10,600 nm wavelength) vaporizes the epidermis and heats the dermis deeply.
What it treats best:
Downtime: 7–14 days of active healing. Skin weeps, crusts, and peels before the new epithelium forms. 3–6 months of pinkness/redness follows. Full healing: 3–6 months.
Who performs it: Dermatologists, plastic surgeons, oculoplastic surgeons. Rarely performed at med spas; typically done at dermatology or surgical practices.
Skin tone restriction: Full ablative CO2 is generally appropriate for Fitzpatrick I–III only. Fitzpatrick IV–VI patients face significant risk of post-inflammatory hyperpigmentation (PIH) and permanent hypopigmentation from full ablative CO2.
Cost: $1,500–$5,000+ per treatment (single session, often). The extent of treatment (full face vs zones) affects cost significantly.
Erbium (2,940 nm) ablates more precisely than CO2 with less surrounding thermal damage — it's a "colder" ablation. Less collagen remodeling stimulation but faster healing.
Advantages over CO2: Faster healing (5–10 days vs 7–14), less thermal injury, can be used on slightly darker skin tones (Fitzpatrick III–IV with care).
Disadvantages vs CO2: Less collagen stimulation, less improvement in deep wrinkles and laxity.
Best for: Patients wanting resurfacing with faster recovery, surface texture and pigment issues, patients with Fitzpatrick III–IV skin who need ablative treatment.
Fractional CO2 and fractional erbium create columns of ablation covering 15–40% of the skin surface, leaving surrounding skin intact. This allows meaningful resurfacing results with significantly less downtime than full ablative.
Common devices:
Downtime: 4–7 days of healing (vs 7–14 for full ablative). Some redness for 2–4 weeks.
Sessions: 1–3 sessions spaced 6–12 weeks apart. Fewer sessions than non-ablative fractional.
Skin tone: Fractional CO2 — Fitzpatrick I–III; fractional erbium can extend to Fitzpatrick IV with caution and proper pre-treatment.
Cost: $800–$2,500 per session.
Non-ablative fractional lasers (the most accessible category at med spas) heat micro-columns in the dermis without removing the epidermis. Results build over months, not visible immediately. Multiple sessions required.
The reference non-ablative fractional device. Two wavelengths:
What it treats: Acne scarring, fine lines, melasma (1927 nm), general skin quality and texture.
Downtime: 4–7 days of swelling, mild peeling, and redness. Much less dramatic than ablative.
Skin tone: 1550 nm can be used on Fitzpatrick I–IV with appropriate settings and pre-treatment. 1927 nm requires more caution on darker skin.
Sessions: 3–5 sessions, 4–6 weeks apart.
Cost: $800–$1,500 per session.
A gentle entry-level non-ablative fractional laser. 1927 nm treats surface pigment and texture with very mild downtime.
Best for: Maintenance patients, patients with melasma or mild sun damage, patients with limited downtime tolerance, and darker skin tones (Fitzpatrick III–IV).
Downtime: 1–4 days of mild peeling ("MOXIe" — a common term for the small flaking particles that shed).
Results: Subtle — appropriate for skin maintenance, not dramatic correction. Often combined with BBL (Broad Band Light) for a "MOXI + BBL Forever Young" treatment.
Sessions: 3–4 sessions, 4–6 weeks apart.
Cost: $400–$700 per session.
| Treatment | Downtime | Fitzpatrick safety | Sessions | Results |
|---|---|---|---|---|
| Full ablative CO2 | 7–14 days + 3–6 months redness | I–III only | 1 | Dramatic |
| Full ablative erbium | 5–10 days + 2–4 months redness | I–IV (caution) | 1–2 | Strong |
| Fractional CO2 | 4–7 days + 2–3 weeks redness | I–III | 1–3 | Moderate-strong |
| Fraxel Dual (1550) | 4–7 days | I–IV | 3–5 | Moderate |
| Fraxel Dual (1927) | 3–5 days | I–III (caution IV) | 3–5 | Moderate |
| MOXI (1927) | 1–3 days | I–IV | 3–4 | Mild |
| Halo (hybrid) | 5–7 days | I–III | 1–2 | Moderate-strong |
Patients with Fitzpatrick IV–VI skin (olive, brown, dark skin tones) have a significantly higher risk of post-inflammatory hyperpigmentation (PIH) and hypopigmentation from aggressive laser treatments. The risk is highest with:
Safe options for Fitzpatrick IV–VI:
Pre-treatment protocol for darker skin types: Many providers use topical hydroquinone, kojic acid, or retinoids for 4–6 weeks before any laser to suppress melanocyte activity and reduce PIH risk.
If you have Fitzpatrick IV–VI skin: Insist on a provider with documented experience treating darker skin tones specifically with your target treatment. This is not the area to see a generalist.
Before laser resurfacing:
After laser resurfacing:
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