Dr Chung Wan Ling | IYAC Aesthetic Clinic

When it comes to treating pigmentation and rejuvenating the skin, Pico Lasers are one of the most talked-about technologies in aesthetic medicine. But not all Pico Lasers are created equal—and understanding how they differ can help you make smarter, more realistic decisions.

Let’s unpack the facts behind the buzz.

1. “Pico” Describes Speed, Not a Specific Device

“Pico” refers to picosecond lasers, which emit energy in ultra-short bursts—trillionths of a second. These brief pulses allow high precision with minimal heat, making them suitable for pigment treatments and skin rejuvenation with lower risk of injury.

However, “Pico Laser” is a general term. These devices can differ in pulse duration, energy delivery, and—most importantly—wavelength.

Common wavelengths include:

• 532nm (targets superficial pigmentation)
• 755nm (targets deeper pigment)
• 1064nm (deeper penetration, suited for darker skin tones)

.
So when someone says “Pico Laser,” it’s worth asking: Which one? And what is it designed to treat?

---

2. Wavelengths Matter More Than the Term “Pico”

Each wavelength interacts differently with the skin:

• 532nm is better for superficial brown spots
• 755nm Alexandrite is often used for deeper pigment like Hori’s nevus
• 1064nm is better suited for deeper structures or darker skin tones

A Pico Laser using the 755nm Alexandrite wavelength is currently the only picosecond wavelength with U.S. FDA clearance (as of Oct 2023) for specific pigment conditions such as Hori’s nevus and melasma.

This highlights the importance of matching the right laser wavelength to your skin concern—not all “Pico Lasers” will work equally for every type of pigmentation.

---

3. There Is No One-Size-Fits-All Laser

Lasers are effective, but no single laser treats every concern. The best results come from customising treatment to match your skin condition, pigment depth, and skin tone.

Here’s how lasers generally work:

This is why a thorough consultation is essential before any laser treatment.

---

4. Pico Lasers Require Patience and Realistic Expectations

It’s tempting to hope for instant results, but pigmentation concerns—especially longstanding or deep-set ones—take time. A single session may help lighten superficial spots, but multiple treatments are usually needed for deeper or more stubborn pigment.

Factors that influence results:

• Type and depth of pigmentation
• Skin tone and sensitivity
• Wavelength and energy used
• Post-treatment care and sun protection

Most people see gradual lightening with each session, spaced several weeks apart. Results improve progressively, and consistency is key.

---

5. Regulatory Clearance and Clinical Confidence

As of October 2023, the 755nm Alexandrite wavelength in a picosecond platform remains the first and only wavelength granted FDA clearance for treating Hori’s nevus and melasma.

While regulatory clearance helps validate safety and efficacy, it doesn’t mean it works the same for everyone. Individualised assessment and treatment remain essential.

---

6. Treating Hori’s Nevus: Progress Takes Time

Hori’s nevus is a type of acquired dermal pigmentation, common in Asian women, appearing as blue-grey or brown spots on the cheeks. These can darken and cluster over time.

Treatment using the Pico 755nm Alexandrite Laser typically involves:

• Pigment absorption of laser energy
• Microscopic fragmentation of pigment particles
• Gradual clearance by the lymphatic system

You may notice a darkening of the spots immediately after treatment, followed by a gradual lightening. Most patients require at least 3 sessions, spaced 6 to 8 weeks apart, and visible results typically develop over 6 to 12 months.

When combined with good skincare and UV protection, many people enjoy long-term clearance.

---

7. Melasma: A Multi-Layered, Multi-Modal Condition

Melasma is more complex than Hori’s nevus. It’s chronic, hormone-sensitive, and aggravated by UV exposure, heat, and stress.

Treating melasma effectively requires a combination approach that targets both the visible pigmentation and the underlying triggers. Laser alone is rarely enough.

A well-rounded melasma plan should include:

• Topical creams that regulate pigment production
• Hydration-focused skincare with antioxidants
• Sun protection (SPF 50+, wide-brim hats, sun umbrellas)
• Oral supplements or medications, when appropriate
• Stress management and quality sleep

Importantly, strengthening the basement membrane—the barrier between the epidermis and dermis—can help stabilise overactive melanocytes.

This can be supported by:

• Microneedling with bio-regenerative compounds such as polynucleotides, PDLLA (Poly-D,L-lactic acid), and growth factors
• Microneedling with radiofrequency (RF) to stimulate collagen and support skin structure

By reinforcing this foundation, we reduce the likelihood of pigment recurrence and help the skin respond more effectively to ongoing treatment.

Melasma cannot be cured, but with consistency and the right approach, it can be well-managed and even go into long-term remission.

---

8. Every Skin Responds Differently

At IYAC, every Pico 755nm Alexandrite Laser session is carefully customised. Your skin’s hydration, sensitivity, and previous response all influence how we adjust the settings each time.

Some people may experience:

• Mild redness lasting a few hours to a couple of days
• Temporary darkening of pigmented areas
• Gradual lightening over several weeks

Others may see the most noticeable brightening only after a few sessions. It’s common to see smoother texture, brighter tone, and more even pigmentation with each visit.

Personalised care is key—because every skin journey is different.

---

Final Thoughts: Choose Smart, Stay Consistent

Pico Lasers—especially at the 755nm wavelength—are powerful tools in managing pigmentation, but they are not magic wands. Results are best when:

• The right wavelength is chosen
• The treatment plan is personalised
• You commit to good skin habits and sun protection
• You have realistic expectations

If you’re feeling unsure, start with a professional consultation. At IYAC, we guide you through your options and create a plan that fits your skin, lifestyle, and goals.

This article is for patient education and does not replace medical advice. Results may vary. A medical consultation is required before any aesthetic treatment.