I am a 25 year old male, for about the last 3 years i have been getting a tight chest tension in the center of my chest. There is always a tension but seams to increase in tension with stress increases. But besides the normal stress that everybody deals with my life is pretty perfect. Food doesnt affect it, i can push my chest out and pull my shoulders back and my chest will crack and that give much relief but theres still a tension. I have been to 2 doctors and the ER i have had EGK, blood work, XRays, and a cat scan on my chest and everything is normal. I asked the doctor 3 years ago with i went the first time if he thought it was stress and he said no, just that simple no test or anything. Help!