Has anyone ever received treatment for skin pigmentation?

I used to have frequent acne and breakouts, so now I have a lot of pigmentation on my skin. My cheeks and chin are particularly dark, creating an uneven skin tone. That's why I've been interested in pigmentation treatments lately. I looked into laser and regenerative treatments, and they seem to be effective, but I'm curious about the long-lasting effects. Is there a way to treat pigmentation without causing too much irritation? If there's a whitening treatment I can do at home, I'd also like to know.