The Bottom Line

Properly performed laser treatments do not thin the skin — in fact, most cosmetic lasers do the opposite. Fractional lasers, ablative lasers, and non-ablative lasers stimulate new collagen production, which actually increases skin thickness over time. The confusion likely stems from the temporary peeling and sensitivity during recovery. When performed by qualified providers at appropriate settings, laser treatments improve skin structure rather than weaken it.

What Lasers Actually Do to Skin

Cosmetic lasers work by creating controlled injury that triggers the skin's healing response. Different lasers target different skin components:

  • Ablative lasers (CO2, erbium): Remove the outer skin layer (epidermis) and heat the dermis. During healing, new collagen forms — studies show a 30-50% increase in dermal collagen after CO2 laser resurfacing.
  • Fractional lasers (Fraxel): Create thousands of microscopic treatment zones surrounded by untouched skin. This stimulates collagen remodeling while allowing rapid healing from the surrounding intact tissue.
  • Non-ablative lasers (Nd:YAG, diode): Heat the dermis without removing surface skin, stimulating collagen production beneath an intact epidermis.

In all cases, the long-term result is increased collagen and thicker, firmer skin — not thinning.

Why People Think Lasers Thin Skin

  • Recovery appearance: Immediately after ablative laser, the skin looks raw and thin because the outer layer has been removed. This is temporary — the epidermis regenerates within 5-10 days.
  • Confusion with other treatments: Topical steroids (cortisone creams) DO thin skin with chronic overuse. People may confuse laser effects with steroid effects.
  • Over-treatment concern: Extremely aggressive or too-frequent laser treatments could theoretically cause excessive tissue damage. This is why qualified providers follow evidence-based protocols with adequate healing intervals between sessions.

What the Research Shows

Multiple studies confirm lasers increase rather than decrease skin thickness:

  • A study in Archives of Dermatology showed fractional CO2 laser increased dermal collagen density by 30-50% measured 3-6 months post-treatment
  • Ultrasound measurements after fractional laser treatments show measurably thicker dermis compared to pre-treatment baseline
  • Histological (biopsy) studies consistently show new collagen type III formation (associated with youthful skin) after laser resurfacing
  • Benefits persist for 1-3 years after treatment, with some studies showing permanent collagen improvement

When Laser COULD Be Problematic

  • Untrained operators: Lasers at inappropriate settings or used by unqualified providers can cause burns, scarring, and permanent damage
  • Excessive treatments: Too many aggressive sessions without adequate healing time (less than 3-6 months between ablative sessions) could theoretically overwhelm the skin's repair capacity
  • Already thin/compromised skin: Patients on long-term oral steroids or with connective tissue disorders need careful evaluation

Frequently Asked Questions

How many laser sessions are safe?

For non-ablative fractional lasers: 3-6 sessions spaced 4-6 weeks apart is standard and safe. For ablative lasers: 1-3 sessions spaced 6-12 months apart. Your dermatologist will recommend a protocol based on your skin's response. Collagen measurement (via ultrasound) can objectively confirm improvement.

Can laser damage my skin permanently?

When performed by a board-certified dermatologist or plastic surgeon with appropriate device settings, permanent damage is extremely rare. Risks increase with untrained operators, overly aggressive settings, and inadequate cooling. Always choose a qualified provider.

Is laser safe for darker skin tones?

Yes, with the right laser. Nd:YAG (1064nm) lasers are safe for all skin types. Ablative CO2 and some fractional lasers carry higher risk of post-inflammatory hyperpigmentation in darker skin (Fitzpatrick IV-VI) and require experienced operators who adjust settings accordingly.

  1. Hantash BM, et al. "Bipolar fractional radiofrequency treatment induces neoelastogenesis and neocollagenesis." Lasers in Surgery and Medicine. 2009;41(1):1-9.
  2. Manstein D, et al. "Fractional photothermolysis: a new concept for cutaneous remodeling." Lasers in Surgery and Medicine. 2004;34(5):426-438.
  3. Alexiades-Armenakas MR, et al. "The spectrum of laser skin resurfacing." JAAD. 2008;58(5):719-737.