Diy gone wrong......

So I did a diy lip scrub on my lips (organic brown sugar, organic raw honey & cayenne pepper) I only used it for 2 days & then after day 2 I notice my lips start start turning black on the corners, so it’s been over a week since I stopped using it & my lips are still black how can I get my lips back to the normal pretty plump pink? My lips look like I’m a smoker :((((