Removing the gained tan - I'm 20 years old. (Photo)

Hi .. my problem is that I got so much tanned and I was white when I was a kid and I got so tanned in a way that will make it impossible for someone to believe it .. cause I used to go like pretty much everyday to the beach and not just that .. I used to stay under the sunshine with no skin cream or something .. So what i wanna know .. is if it's possible to have my original skin color back and what's the treatment and if it has any side effects .. Thank you .