Fraxel vs. Erbium Glass: Which laser is better for deep acne scars?

March 30, 2026

Fraxel vs. Erbium Glass: Which Laser is Better for Deep Acne Scars?

When dealing with deep, pitted acne scars, standard facials aren't enough—you need a powerful laser capable of rebuilding collagen within the dermal layers. In the world of fractional resurfacing, the two most debated options are the classic Fraxel and the modern Erbium Glass laser.

Fraxel: A pioneer in fractional technology that creates micro-injuries to trigger intense skin remodeling. It is available in both non-ablative (Restore/Dual) and ablative (Repair) versions.
Erbium Glass: A sophisticated 1550nm non-ablative laser that heats the dermis deeply while leaving the skin's surface (epidermis) intact for a much smoother recovery.

Who Is Fraxel Best For?

Fraxel is the go-to for those who have significant structural damage and can afford a few days of social downtime:

Deep boxcar or rolling scars that require a more aggressive approach.
Severe skin texture issues and large pores caused by chronic acne.
Individuals with sun damage and pigmentation alongside their scarring.
Patients looking for stronger, more dramatic results in fewer sessions.
Those who want a proven, clinical "gold standard" with decades of results.

👉 Especially popular for those with fair to medium skin tones who want a complete "skin reset."

Key Benefits of Fraxel

Dual Wavelength (Fraxel Dual): Uses 1550nm for deep scars and 1927nm for surface pigmentation in one go.
High Intensity: Penetrates deep into the dermis to break up old scar tissue and force new collagen growth.
Broad Surface Resurfacing: Excellent at "flattening" the edges of indented scars to make them less visible.
Clinical Authority: One of the most researched lasers in history for dermatological safety and efficacy.
Onset: Roughness and "bronzing" for 3–5 days, with smoother skin appearing after 1 week.

👉 Summary: Best for deep scars, pigmented texture, and high-intensity resurfacing.

Who Is Erbium Glass Best For?

Erbium Glass (often found as devices like Sellas or Mosaic in Korea) is ideal for the modern, busy lifestyle:

Mild to moderate atrophic scars (indented scars) that need consistent improvement.
Individuals with a busy schedule who cannot afford a week of redness or peeling.
Patients with sensitive skin or darker skin tones (lower risk of post-inflammatory hyperpigmentation).
Those focusing on skin density and pore reduction without the "burnt" look of traditional lasers.
Anyone looking for a painless, "lunchtime" scar treatment with minimal swelling.

👉 Particularly suitable for students or office workers in Seoul who want to continue their daily routine immediately.

Key Benefits of Erbium Glass

Selective Thermal Action: Heats the water in your skin to stimulate collagen without vaporizing the top layer.
Minimal Downtime: You might experience slight redness for 24–48 hours, but you can wear makeup the next day.
Improved Safety Profile: Significantly reduces the risk of "rebound" darkening or long-term redness.
Pore & Texture Refinement: Exceptional at tightening the skin's "architecture" for a smoother surface.
Onset: Gradual improvement in skin thickness and scar depth over 3–5 sessions.

👉 Summary: Best for moderate scars, minimal downtime, and skin density.

Main Effects & Comparison

Fraxel (The Resurfacing Powerhouse)

Core Goal: Breaking down scar tissue and resurfacing the top layer.
Best For: Deep boxcar scars and sun-damaged texture.
Downtime: 3–7 days (Redness, peeling, "sandpaper" texture).

Erbium Glass (The Gentle Rebuilder)

Core Goal: Deep dermal heating to fill in scars from the bottom up.
Best For: Rolling scars, large pores, and sensitive skin.
Downtime: 1–2 days (Mild redness, zero peeling).

The Procedure Step-by-Step

Consultation: A dermatologist examines your scar types (Icepick, Boxcar, or Rolling) to choose the right energy level.
Numbing: A strong topical numbing cream is applied for 30–40 minutes (especially important for Fraxel).
Treatment: The laser is moved across the face in a grid pattern. You will feel a snapping or warm prickling sensation.
Cooling: Cold air or ice packs are used immediately after to take the "heat" out of the skin.
Regeneration: A soothing PDRN (Salmon DNA) or Centella mask is applied to speed up healing.
Total Duration: 60–80 minutes.

Precautions & Aftercare

Moisture is Key: Use a thick, hypoallergenic recovery cream for at least 7 days to support the new skin.
Sun Protection: Your skin is highly "photo-sensitive" after these lasers. SPF 50+ is mandatory every 4 hours.
Hands Off: If any micro-crusts form, never scrub them. Let them fall off naturally during washing.
Skip Irritants: Avoid Vitamin C, Retinol, and chemical exfoliants (AHA/BHA) for 2 weeks.

Estimated Pricing (In Korea)

Fraxel (Full Face): Approx. ₩250,000 – ₩600,000 per session.
Erbium Glass (Full Face): Approx. ₩150,000 – ₩350,000 per session.
Note: In Seoul, these are often bundled with "Skin Boosters" (like Juvelook) to fill in the scars even faster.

Why Get These Treatments in Korea?

Combination Therapy: Korean clinics rarely use just one laser. They often combine Fraxel with Subcision (physically breaking scar bands) for superior results.
State-of-the-Art Devices: Seoul's Gangnam district houses the latest 2026-edition laser models with better cooling and faster pulse speeds.
Post-Care Excellence: The "Aftercare" in Korea (Cryo-soothing, LED, and premium masks) is included in the price, ensuring you heal quickly.
Global Value: You can get 3 sessions of Fraxel in Seoul for the price of 1 session in New York or London.

Final Thoughts

If you have deep, stubborn scars and can take a few days off to let your skin peel and renew, Fraxel remains the undisputed king. However, if you want to gradually smooth out your skin while maintaining your social life, Erbium Glass is the smarter, modern choice. In many Seoul clinics, the best results come from a "Dual Approach"—starting with Fraxel for heavy lifting and finishing with Erbium Glass for refinement!