I have melasma and freckles on my cheeks. What is an effective and safe treatment method, and does laser treatment thin facial skin? (Dao Nhung, 39, Hanoi)

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.