severe dark knuckle on my toes and ankle

[CErica24]

Okay im in my mid 20s chocoated skin colour nigerian lady. I used a so called natural organic cream which gave me dark knuckles. I just got a lactic acid peel 80 % and grace duo serum. I've used the lactic acid peel and grace duo serum. My skin has started peeling revealing a more clearer skin. Now I dont know how to keep it from going dark again. I got AHA moisturiser  (secalia isis pharma). Should I use it or shea butter instead. SomeOne also suggest I use a lighting cream. What do you suggest please help.