So, I used to have pretty bad eczema when I was a kid. I also had a scratching habit that I grew out of 10 years ago. I'm now 19. Last winter, I started scratching behind my knees (like I did in 3rd grade), and on the tops of my feet. Nowhere else. It got so bad that I was beginning to draw blood, and then I would realize I was scratching. My feet have mostly healed since then, but the backs of my knees still look terrible.