What Is Pigment Laser Treatment? A Guide to Principles, Types, and Post-Procedure Care

How Does Pigment Laser Treatment Work?

Pigment laser treatment is explained through a principle called 'Selective Photothermolysis.' The concept is that when the laser's pulse width is shorter than the thermal relaxation time of the target pigment (such as melanin), the laser can act selectively on the pigmented area while minimizing effects on surrounding normal tissue.

The commonly used Q-switched laser is reported to work by emitting high-energy, ultra-short pulses that break down pigment deposits in the skin into smaller particles. These fragmented pigment particles are known to gradually fade over time through the body's lymphatic system and immune activity.

More recently, so-called 'pico lasers,' which use ultra-short pulses in the picosecond range, have also been used. These are thought to work primarily through photomechanical effects, resulting in relatively less thermal damage to surrounding tissue. However, the idea that this may reduce the occurrence of post-inflammatory hyperpigmentation is still under clinical investigation, so it is difficult to state this definitively.

Different Wavelengths Target Different Pigment Depths

The depth and type of pigment that responds to pigment laser treatment is said to vary depending on the wavelength used. For example, with the Q-switched Nd:YAG laser, the 1064nm long wavelength is absorbed relatively less by epidermal melanin and penetrates deeper into the skin, making it reported to be used for pigmented lesions located in the dermis. The 532nm short wavelength, meanwhile, is known to be suitable for more superficial pigmented lesions.

Because the appropriate wavelength and method can vary depending on the location, depth, and type of pigment (epidermal, dermal, mixed, etc.), it is difficult to determine the type of procedure without an accurate diagnosis. A process involving diagnosis and consultation with a specialist regarding the skin's condition is necessary.

Melasma Injections vs. Pigment Laser: A Difference in Approach

Melasma injections are often compared with pigment laser treatment when it comes to managing pigmentation concerns. Both procedures share the common goal of addressing dull, uneven-looking pigmentation, but they differ in their approach.

Melasma injections deliver ingredients via injection to help manage the overall condition of the skin, while pigment laser treatment uses laser energy to act directly on the pigmented areas. Depending on the type and condition of the pigmentation, one method may be used alone, or the two may be planned together. Which approach is suitable can vary depending on an individual's skin condition and pigmentation pattern, so it is recommended to decide through consultation.

Recovery Process, Downtime, and Side Effects to Watch For

After pigment laser treatment, the treated area may experience temporary redness, a burning sensation, or fine crusting and residue. The time it takes for these reactions to subside and for pigmentation to lighten, as well as how noticeable this process feels, can vary significantly from person to person, making it difficult to generalize.

A known side effect is post-inflammatory hyperpigmentation (PIH), which tends to be reported relatively more often in individuals with darker skin tones. Related studies have reported cases of temporary hyperpigmentation that resolved within a certain period after using sunscreen and brightening products, as well as cases of temporary hypopigmentation. However, these are findings from individual studies and cannot be assumed to apply uniformly to all cases.

A low-energy, multiple-session approach (sometimes referred to as 'laser toning') is described as a way to manage pigmentation while minimizing thermal damage and inflammatory response. However, because it requires repeated sessions, improper spacing or frequency of treatments is known to potentially cause hyperpigmentation or hypopigmentation, so it is important that this be carried out under a specialist's judgment.

Why Home Care Matters During Recovery

Immediately after pigment laser treatment, the skin is in a temporarily sensitive state due to the laser energy, and barrier function may be reduced during this period. Thorough sun protection during this time can help reduce the risk of pigment recurrence, and it is recommended to avoid irritating ingredients (such as high-concentration acids or scrubs) and instead focus on soothing and hydrating care with gentle ingredients.

If crusting or residue forms, it is best to let it fall off naturally rather than removing it manually, and maintaining deep hydration during this process can help support recovery by preventing the skin from becoming dry. The speed and pattern of recovery can vary depending on individual skin condition, treatment intensity, and care method.

Post-Procedure Recovery Is Shaped by Home Care

During periods when the skin is sensitive and the barrier is weakened, such as right after pigment laser treatment, home care that minimizes irritation while providing soothing and hydration can be helpful. AbyU Cream is designed as a two-step system to align with this recovery process: immediately after the procedure, STEP1 Ultra Cera-Rich can be used to focus on soothing redness and caring for the skin barrier, and during the following recovery period, STEP2 Hydro Re-Boosting can be used to replenish deep hydration. However, the timing and method of product use may vary depending on the condition of the treated area, so it is advisable to also follow the guidance of your treating physician.

Medically reviewed by 아비쥬의원 의료진. (September 10, 2026)