clothing and cover as much as possible. Usage of a cap or hat and umbrella is encouraged. Skin already tanned can be treated with de-pigmenting creams and other oral medications. A good skin care regimen comprises 4 steps - cleansing, toning, moisturizing and sun block. Based on your skin type, a dermatologist will recommend you appropriate products. Home made solutions - you need to consult somebody else for that. It is a double edged sword and may cause more harm than benefits.
Your dermatologist will decide a treatment plan for you after a consultation.