Can I Safely Use Kojivit Plus Or Glyco 6 To Restore My Skin Tone On My Butt Area?

Hlo doctor As lockdown was started , I constantly sitting more nowadays because of online classes and that cause mine bum area dark which is too far from mine original skin colour . I m fair in skin colour . So please suggest me some medicated cream which I can use to restore my skin tone back on my butt area safely Can I use kojivit plus cream or gylco 6?