What treatments are available for melasma and pigmentation?

I have never had laser treatment even once, so I am even more curious.

Can melasma and pigmentation be treated with just laser?

What type of laser treatment should be performed?

I have no idea about this side at all.

I mainly work outside due to my job, so I am completely tanned. As a result, I am exposed to a lot of UV rays and don't apply sunscreen often, so my dark spots and pigmentation are very noticeable ㅠㅠ

How long does the treatment take and how much does it cost?

It must be very expensive, right?