Laser Skin Resurfacing San Diego: HALO, CO2 & More

If you've heard the terms "HALO laser", "CO2 laser", "fractional laser", and "erbium laser" and have no idea what they mean or how they differ — you're not alone. In my practice in Encinitas, I spend considerable time explaining laser types because the choice directly impacts your downtime, results, and whether it's even appropriate for your skin.

How Do Laser Skin Treatments Work?

All ablative and fractional lasers work on the same principle: controlled thermal injury to the dermis to stimulate collagen remodeling and skin tightening. The laser targets specific wavelengths that penetrate to precise depths. The type of laser determines which wavelength, how deep it penetrates, and whether it removes tissue (ablative) or creates microscopic columns of damage with preserved skin between them (fractional).

Main Laser Types and What They're Best For

CO2 Laser (10,600 nm)

The deepest penetrating and most powerful laser in dermatology
Both ablative (full-face resurfacing) and fractional versions exist
Best for: Deep wrinkles, significant acne scarring, loose skin, severe sun damage
Downtime: 7–14 days for ablative; 5–7 days for fractional
Results: Most dramatic and long-lasting of all laser options
Caution: Higher hyperpigmentation risk in darker skin tones

Erbium Laser (2,940 nm)

Shallower penetration than CO2; targets the epidermis and superficial dermis more specifically
Less thermal injury to surrounding tissue (cleaner ablation)
Best for: Fine lines, superficial wrinkles, mild-to-moderate acne scars, sun damage without deep scarring
Downtime: 3–5 days for ablative; 2–3 days for fractional
Results: Good but less dramatic than CO2
Advantage: Lower risk of hyperpigmentation than CO2

Fractional Laser (any wavelength used fractionally)

Leaves microscopic columns of untreated skin between treated areas
Allows faster healing than ablative (treated skin heals from surrounding preserved skin)
Best for: Patients who need results but cannot afford significant downtime; moderate scarring; textural issues
Downtime: 3–7 days depending on intensity
Sessions: Often requires 3–5 treatments spaced 4–6 weeks apart

Combination Approach: "Stacked" or Hybrid Treatments

Some clinics (including mine) combine modalities — e.g., fractional CO2 laser followed by gentler erbium or IPL treatments
This allows deeper penetration with slightly better safety profile

What Problems Do Laser Treatments Solve?

Acne scarring (icepick, boxcar, rolling scars)
Fine and deep wrinkles
Skin texture irregularities and enlarged pores
Post-inflammatory hyperpigmentation
Sun damage and age spots
Mild to moderate skin laxity
Surgical scars

How Laser Treatments Work on Acne Scars Specifically

Laser resurfacing works on acne scars through two mechanisms:

Collagen remodeling: The thermal injury stimulates fibroblasts to produce new collagen, which fills in depressed scars from the inside out.
Scar tissue reorientation: The laser disrupts abnormal scar collagen and allows organized collagen to reform in a more normal pattern.

Deep icepick scars require deeper penetration (CO2 laser), while shallow rolling or boxcar scars respond well to gentler fractional erbium or combination treatments.

Laser Safety Across Different Skin Tones

This is crucial: CO2 and erbium lasers carry higher risk of post-inflammatory hyperpigmentation in darker skin tones (Fitzpatrick IV–VI). In my practice, I often choose fractional laser at lower energies, combination treatments, or non-laser alternatives like chemical peels or microneedling with PRP for darker skin tones.

Recovery and Results Timeline

Days 1–3: Swelling and mild discomfort (managed with ice and pain control)
Days 4–7: Peeling, flaking, crusting — expected and normal
Week 2–4: Most skin returns to baseline appearance, but deeper remodeling continues
Month 3–6: Collagen continues to remodel; results continue to improve
Month 6–12: Final results visible; these last for years

Frequently Asked Questions

Q: Which laser is best for acne scars?
A: Fractional CO2 for deep icepick scars; fractional erbium or combination treatments for moderate scars; chemical peels for mild scars and hyperpigmentation.

Q: How many laser treatments do I need?
A: Ablative (full-strength) treatments: 1–2 sessions often suffice. Fractional: typically 3–5 sessions spaced 4–6 weeks apart.

Q: Can I get laser done if I have dark skin?
A: Yes, but with modified settings and careful selection. Fractional approaches and lower energies reduce hyperpigmentation risk.

Q: How long do laser results last?
A: Results from ablative or aggressive fractional laser last for many years — often 5–10 years or longer. Maintenance treatments can extend this.

Book a laser consultation at SOM Aesthetics in Encinitas →

Related Articles: