I'm curious about an effective treatment method to improve facial pigmentation!

I'm struggling with the darkened pigmentation around my eyes and cheeks. Despite home care and diligent sunscreen application, the blemishes I've developed don't go away easily, so I'm considering a procedure.

My current concern is that I have a mix of dark spots and freckles, which makes my skin tone look dull overall. I'm curious about the most common treatments for addressing this type of facial pigmentation.
Additionally, people with sensitive skin may be concerned about the risk of side effects such as burns or darkening of pigmentation when receiving facial pigmentation treatments.

I would like to know how many times facial pigmentation treatment is usually required to see visible results.
Please reply!