Quick 10 points health worry..?

The images below are of my arms/elbows, its like Ihave two bones sticking out. Do they look like this because im skinny? If notdo you know why? Im 17, 5ft 10 and 9.5 stone. My arms have been like it my whole life and im so self concious of it. .. Image 2 is the INSIDE view of my... show more The images below are of my arms/elbows, its like Ihave two bones sticking out. Do they look like this because im skinny? If notdo you know why? Im 17, 5ft 10 and 9.5 stone. My arms have been like it my whole life and im so self concious of it. ..

Image 2 is the INSIDE view of my elbow.

http://postimage.org/image/qjf16v2i3/
http://postimage.org/image/sps63pgf5/
http://postimage.org/image/n9e3n2cff/
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