it started about 1 yr ago...i noticed a small red,small, rash looking thing but it didnt realy itch. its been a year now and its become larger in size. its nearly the size of my bladder...it becomes darker red when i work out, or run...anything of that nature. once again it does not itch...there are times when the marked are does not show fully. it remains almost skin color but bieng on my body i can still see it............WHAT IS THIS???????