Aloe vera-is rich in antioxidants lighten the skin by inhibiting the activity of the enzyme that causes pigmentation of the skin. Baking soda-is very helpful in removing dirt and nourishing your skin from within. First mix 3 tablespoons of baking soda with water and apply it on your neck.when it dries use wet fingers to scrub it off and then rinse with water. You can repeat this every day to see the desired results. Don't forget to moisturize after using baking soda. Potato juice-have bleaching properties that lighten your skin to a considerable extent and also make your skin tone even. olive oil and lemon juice-Lemon has natural bleaching properties. It brightens the complexion and also shrinks pores.Olive oil conditions and hydrates the skin and makes it soft Mix equal parts of lemon juice and olive oil. Apply this serum on your neck before going to bed.