I am 24 years old, I am in a healthy weight range, I do not smoke or have high blood pressure or cholesterol and every single time I work out on the treadmill I get sharp pains in the left side of my chest that almost always radiates to my arm and neck. The pain starts about 7 minutes in and is located near the bottom of my rib cage. The pains do go away almost immediately after my workout. I have not called or seen my doctor about it yet. Can anyone relate or tell me what they think it is????