What are the effectiveness and treatment cycle for melasma?

I would like to inquire about melasma treatment.

I looked into melasma treatments and found various methods like Pico Toning and Laser Toning. I am curious if the treatment method varies depending on the skin condition. Please also let me know which procedure is generally recommended to start with if I am receiving melasma treatment for the first time.

I am also curious whether visible changes can be seen after just one melasma treatment, or if consistent sessions are necessary. I would like to know the typical treatment frequency and the recommended number of sessions.

It seems the cost of melasma treatment varies from clinic to clinic, so I am curious about the pricing. I am looking for a way to manage it consistently rather than undergoing very expensive procedures, so I am also interested in reviews and satisfaction levels from those who have received treatment.

Please also let me know about skin irritation and precautions to take after the procedure.