Hi, I am a 54 yo female and I have been having occaisional chest pain for a couple of years. The pain is in the upper left chest area and feels like dull to sometimes sharp relatively concentrated pain. It usually comes on after stress or excercise. I had a traditional stress test a couple of years ago, but there were no irregularities in my ECG. I just had a Nuclear stress test with the same results. Today, I walked on my home treadmill for 30 mins and my chest pain returned. That was 3 hours ago and my chest is still tender, especially when I breathe deeply. I am trying to research this so I can stop worrying about heart problems that do run in my family. I just found info on the condition costochondritis . What do you think? Thanks, Dianne