Express News Service Before you decide to see a doctor to treat skin pigmentation, there are a few things you can keep in mind to reduce damage. Vitamin C This is one of the most sought-after treatments for a variety of skin issues, including pigmentation. While lemon juice is the most preferred source of Vitamin C, people with sensitive skin can opt for Vitamin C-based serums and sheet masks. Niacinamide It is an active form of Vitamin B3, a powerful ingredient for skin brightening. Its growing popularity has resulted in it being made a part of many skincare formulations so all you have to do is find a product with niacinamide in it.