Melasma occurs when melanin production and distribution are disrupted by ultraviolet radiation, hormonal changes, inflammatory responses, or aging.

A 35-year-old woman from Khanh Hoa, My An, asks if her long-standing patchy and deep-seated melasma, which makes her sensitive skin prone to redness after procedures, can be treated with laser without worsening the condition or causing post-treatment hyperpigmentation.