Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Skin complexion has contributions both from the genetics as well as from environment. While it is possible to modify environmental factors like sun exposure std it is not possible to alter ones genetics. I suggest you to use a broad spectrum sunscreen, throughout the day. At night i suggest you to use a kojic acid based cream. In addition I suggest some of my patients with similar complaints to take an oral glutathione supplement. Glutathione is an antioxidant and it has skin whitening properties. These are all prescription medications and I would advice you yo take them under supervision of your dermatologist. Hope I have answered your query. Let me know if I can assist you further.