Which laser is most suitable for treating café-au-lait spots?

Generally speaking, there is no single laser treatment that is considered the best for dermal melanocytosis (acquired bilateral nevus of Ota-like macules, ABNOM). Treatments such as picosecond laser, ultra-picosecond laser, fractional laser, Q-switched ruby laser, and Q-switched alexandrite laser can be selected based on medical advice and individual conditions. However, effectiveness may vary from person to person. It is recommended to visit a reputable hospital and undergo the procedure under the guidance of a qualified physician. Detailed explanations are as follows:

1. Picosecond Laser: The picosecond laser rapidly shatters melanin particles and promotes their metabolism and elimination from the body. At the same time, it stimulates collagen regeneration, improving skin texture and elasticity. The general reference price for picosecond laser treatment is ¥2000–7000 per session, with visible improvement typically seen within 7–15 days.

2. Ultra-picosecond Laser: Ultra-picosecond laser utilizes extremely short-pulse beams that penetrate into the dermis, precisely targeting areas of pigmentation. This technology features extremely high peak power and minimal thermal diffusion, thereby avoiding significant damage to surrounding healthy tissues. The general reference price for ultra-picosecond laser treatment is ¥3000–5000 per session, with visible improvement typically seen within 10–15 days.

3. Fractional Laser: Fractional laser emits micro laser beams that create numerous microscopic zones of thermal injury on the skin. It directly targets pigment particles, breaking down the pigmentation of dermal melanocytosis, while also stimulating collagen production and tissue remodeling, resulting in smoother and finer skin. The general reference price for fractional laser treatment is ¥3000–6000 per session, with visible improvement typically seen within 7–15 days.

4. Q-switched Ruby Laser: Utilizing a specific wavelength beam acting on the epidermis, the Q-switched ruby laser breaks apart pigment particles. This laser can penetrate into the dermis to decompose melanin, reducing or eliminating dermal melanocytosis. It is suitable for treating superficial pigmented lesions with clear borders. The general reference price for Q-switched ruby laser treatment is ¥2000–8000 per session, with visible improvement typically seen within 5–7 days.

5. Q-switched Alexandrite Laser: This technique uses high-energy pulsed laser to precisely target and destroy melanocytes. The technology allows precise control of laser energy, reducing the risk of damage to surrounding healthy tissues, and is particularly effective for brown spots. The general reference price for Q-switched alexandrite laser treatment is ¥2000–8000 per session, with visible improvement typically seen within 5–7 days.

Maintain good daily habits, ensure proper skin hygiene, and avoid infection to prevent compromising treatment outcomes.