What kind of cream can I use to get rid of discoloration on my face for people with dark skin color that works

I have tried over 6 different types of creams and solutions and cannot find something to get rid of facial discoloration for dark skin tones.What kind of cream can I use to get rid of discoloration on my face for people with dark skin color that works
i know some african american have used skin lighteners that really worked for them.. here's a good source for safe and potent skin lighteners -What kind of cream can I use to get rid of discoloration on my face for people with dark skin color that works
Maderma