Hey guys I know this isn't really a sexually-related question, but I wanted to ask it here because a lot of people check this forum out. Sometimes (not all the time) when I breath in deep, I get a sharp pain from under the left side of my ribcage, like right next to the sternum, kind of near the heart I guess. I can't figure out what this is as it only came about like a month or 2 ago. I'm only 21 and in good health otherwise. It's bugging me and I was wondering if anybody else experiences this. It used to happen occasionally when I was younger but not in the same place like it always does now.