Skin Question

Hi, I have had the same bump on my chest for the past twoish years (perhaps longer). I no longer recall how it began. I have completely normal sensation there, as if it is just a raised patch of skin; no itching or pain. What is it? I have taken pictures: http://i50.tinypic.com/200s1l4.jpg http://i47.tinypic.com/ouw2v6.jpg... click here to continue

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