There are many home treatments to make the skin fairer. The first is to mix equal parts of lemon juice and cucumber juice together and apply to skin for 15 minutes then rinse. Applying egg whites to the face will do the job. Another is to mix cucumber juice and yogurt. Apply to skin and rinse after 20 minutes.
Get less exposure to the sun. You can either stay inside, wear more clothes such as hats and long sleeves, wear more sunscreen, or even carry an umbrella to block the sun. Just limit how much sun hits your skin