Evening darker skin
With darker skin tones, anything that causes irritation can lead to dark spots or patches. It is difficult to advise you without seeing your skin tone and the extent of your problem, and you don't want to make the problem worse or lighten the areas too much, so I urge you to seek help from a dermatologist.
In general, one of the best ways to lighten dark spots and even pigmentation is with a cream containing hydroquinone. Hydroquinone blocks a step in the production of pigment. ...