How many sessions of melasma laser toning are required?

Hello

I am worried because dark spots appear on both cheeks even with minimal outdoor activity. In the past, they could be covered with a thin layer of concealer, but now the marks have deepened like age spots and are not easily concealed even with makeup.

I’ve been looking into dermatological treatments and many people recommend laser toning. I’m wondering how many sessions are typically required to see noticeable lightening. My skin is slightly dry and thin, so I’m also concerned that the laser procedure might irritate it further.

If anyone has received melasma treatment, please let me know if you have any reviews or aftercare tips.