Please tell me about skin pigmentation

I'm writing to inquire about facial pigmentation. Some of the pigmentation occurred after a pimple appeared and then disappeared, others after an injury healed, and others for reasons I can't remember. I've tried several cosmetics that claim to help with pigmentation, but I personally haven't seen any results. I've even gone to another clinic for consultation, but it requires so many regular visits and is so expensive that I couldn't commit to it. Does Maypure have any good treatments for pigmentation?