Laser toning involves multiple treatments using a low-power, Q-switched Nd:YAG 1064 nm laser with a wide spot size and low energy, and is a method commonly used in Asian countries for the treatment of melasma and pigmentation. The principle behind this treatment is selective photothermolysis, which involves selectively delivering thermal energy to melanosomes containing pigment to break down the pigment into smaller particles. The literature generally reports a treatment protocol involving multiple sessions (typically around 9 to 10 sessions) repeated once a week or every other week, with improvements in melanin and erythema indices observed. However, excessive cumulative energy increases the risk of side effects; approximately 10% of East Asians are reported to experience punctate hypopigmentation, and rebound hyperpigmentation or post-inflammatory hyperpigmentation may occur. The recurrence rate is also relatively high, so maintenance care, sun protection, and combination therapy are all considered. Since the response and risks vary depending on an individual’s skin type and the depth of pigmentation, a consultation is necessary to assess these factors. This information is for reference only and does not constitute a diagnosis. Please consult a specialist before undergoing any actual procedure.
[Source] https://pmc.ncbi.nlm.nih.gov/articles/PMC9323185/ · https://dermnetnz.org/topics/melasma