I'm 58 yr old female with strong family history of heart diseases. I am 20 lbs overweight - I'm currently working on this. My bp is - 110/60, total cholesterol is a little high and am how taking low dose Lipitor. My problem is that a year ago I noticed when I went for a walk outside in the cold weather, my lower jaw and neck tightened up to the point I felt pain. It was like a scarf tightened around my neck and lower jaw. I am not grinding my teeth or clenching my jaw. The pain went away when I stopped walking and went inside. This happens also when fast walking on an indoor track where I work out. When I tried jogging I felt as though my head would explode. I must let you know this does not happen when I do weight training. Last Feb. cardiologist did tests such as cardiogram and I passed with flying colors. However, the pain for me continues and is interfering with my exercising. Is there any way this is related to my cardiovascular system?