A lot of people have this issue with dark skin areas and this is normal. This pigmentation is called acanthosis nigricans and is due to aging and sun exposing. Also, these areas do not have oil glands so the skin is prone to drying. If you skip skin care on these areas it can worsen. The armpits are dark due to antiperspirant use or shaving too. This will make you ashamed to lift the arms. Carefully choose cosmetics even if they smell amazing. We present now some remedies for this for the neck 1. Baking soda The baking soda is exfoliating the skin and cleaning it too. It erases even freckles. Mixed with water is like a paste and whitens the neck too. Mix 3 parts soda and 1 water, apply on the neck and wait to dry. After few minutes, rinse and repeat twice weekly. 2. Potato They are crystalline in content and have catecholase that lighten skin. Grind them and place the juice on the area. Wash with cold water after 15 minutes. Or mix lemon and potato juice and after 15 mi...