Hello, my name is steve and i am the age of 15 about 5'11'' and 180lbs. I have been expiriencing some akward irratations in my chest. Sometimes when i breathe it feels like the oxygen is rubbing off something in my chest sorta like something is hanging on my lungs , or the feeling is like a light rubbing or the feeling of a slight inside itch(like a tingle)at the bottom of my left rib between the nipple and the middle of the chest, now there is no pains to this irritation but i just am a bit considered to what this may be? I may be over reacting it, but if anyone knows to what i should do please i would appreciate that you mention it. Thank you