duachua

hi. i have this question about my skin and im not sure if this is your type of question to answer. okay. teh problem is that few years ago. i scratched my legs SSOO MUCH that it would bleed and got infected.but it all healed now. however, due to my constant scratches, my legs (behind) form nasty and very visible dark area (half of the upper leg starting from knee to half down to ankle). so half of each of my legs are really dark. darker than my skin. since my legs are quite quite. therefirore, the marks are very visible. since then. i could not wear anything shorts or dresses. summer is soo freaking hot, but im still stuck with jeans. im soo jealous of those who can wear anything they want. what am i going to do? how can i make those dark areas/marks fade away?????. it seems like those form underneath the skin surface. pleasee helpp meeeee...