I've had a wound on my knee from falling on a sidewalk and skinned it badly. I didn't go to a doctor because I figured I didn't need one and it was going to be fine. Its day 3 with this wound and its starting to turn green. I'm not really concerned, I'd just like to know if it's infected, it's normal and stuff like that. Whenever it gets wet or when it rubs against my leggings it comes off when it's really close and it feels kind of like vaseline and bleeds a bit. It's on my lower knee and is about 3 cm wide and 1 cm tall. I've also felt a little pain in my entire left leg, and also want to know what that's all about. Advice on what i should do to treat it and if that green stuff is bad or not? Thanks.