My Chin is Darker Than Rest of the Face, What Should I Use to Even my Skin?

The question is why is your chin darker than the rest of you face and body? Do you have a birthmark? Is there and ongoing inflammatory condition such as acne, eczema or ingrown hairs? The treatment would depend on the cause. If you have a birthmark you may need a laser procedure? If inflammation is the cause then you must treat the problem and perhaps use a bleaching or brightening cream.