In reference to heart disease, chest pain is also called angina and is often caused by decreased blood flow to the heart. Chest pain can come on suddenly at any time. It is one of the most frightening symptoms a person can have. Chest pain is one of the most common reasons people call for emergency medical help. Every year emergency room doctors evaluate and treat millions of people for chest pain.
Fortunately, chest pain doesn't always signal a heart attack. But even if the chest pain you experience has nothing to do with your cardiovascular system, the problem may still be important. A wide range of health problems can cause chest pain including the heart, lungs, esophagus, muscle, bone, and skin.
Because of the complex nerve distribution in the body, chest pain may actually originate from another part of the body. In many cases, the underlying cause has nothing to do with your heart — though there's no easy way to tell without seeing a doctor.