Thank you for your question. There are 2 things you need to do. 1) If you like wearing skirts or short, you should not go out without sunblock on your legs, otherwise you will just keep on getting more dark marks. 2) We need to give you something that will treat the dark marks that are already there. Something like Neostrata’s Lotion Plus, or if your skin is very dry, then Neostrata’s Problem Dry Skin Cream.