Face Tan Before And After I Was Fair In Complexion Before. But When I Started To Expose My Face In Sunlight I Became Tan?

I was fair in complexion before. but when i started to expose my face in sunlight i became tan? - face tan before and after

I was in front of fair complexion. But when I started, I put my face to sunlight was colour.so tan.Now my face to tell me some ways and DNT pls pls suggest a lotion or cream, you want solutions IAM Nature India so if I can not help Indians .