Medical treatments are the fastest way to get rid of dark spots on your face but if you want a cheaper home remedy to get rid of the dark spots on your face you can use lemon juice from a lemon and a cotton ball.
Take a lemon and cut the lemon in half and squeeze the lemon juice out onto a cotton ball and then apply the lemon juice to your dark spots on your face with the cotton ball and let the lemon juice sit for up to 10 minutes or until it dries.
Then wash your face off with soap and water and you may have to apply the lemon juice twice daily for a week or two but the dark spots will be gone.