Suggest Treatment For Itching On Legs

Hi, I have been having issues with my legs itching for about 10 years. Its an extreme itch that feels almost like a numb tingly feeling from the inside out. Its so bad that over the years my legs have gotten to be nothing but scars and more deep scratches because it seems as if the itch isnt satisfied until its bleeding. I have tried lotions, different fabrics, every soap imaginable. Recently I noticed that my legs itch more when I lay down or stand up. Mainly more before bed and upon waking. The same goes if I sit down to watch a movie, they itch. When I stand up again they itch then as well. I have read everything from diabetes to being allergic to your own sweat. I am not sure what to do about it anymore but its really annoying! Please help!