Hi all, when I was 28 I started experiencing this symptom and wen to the doctor twice. The second time my doctor diagonsed me with Teitze Syndrom, also named Costochondritis, inflamation of the cartilege around the breast bone. I got through it then and it didn't flare up until recently. I am now 48 and it started again. I have read many things and one prevention magazine has said it is a virus that comes and goes. My breastbone is popping once again and it is disturbing but it feels so much better each time I let it pop. I also do hair for a living and the way I hold my arms up seems to make it worse in the way that it pops. Read up on the information that I gave y ou and you will feel much better!View Thread