Hi, I am 17 years old and have had red/purple legs and feet for about 2 years now. They are always discolored, unless i elevate them and get more blue in cold, and more red in warmth. They often tingle, burn and cramp up. They also shoot pain up my legs. No doctor's know what this is, but I am desperate to find an answer so i can go on with my teenage life. please let me know if you have any ideas or know of where i can send my questions. Thank you so much!