As with other sudden, unexplained pains, chest pain may be a signal for you to get medical help. Use the following information to help you determine whether your chest pain is a medical emergency.

Heart attack
A heart attack occurs when an artery that supplies oxygen to heart muscle becomes blocked.

A heart attack generally causes chest pain for longer than 15 minutes. But a heart attack can also be silent and produce no signs or symptoms.

Many people who suffer a heart attack have warning symptoms hours, days or weeks in advance. The earliest predictor of an attack may be recurrent chest pain that is triggered by exertion and relieved by rest.

Someone having a heart attack may experience any or all of the following:

• Uncomfortable pressure, fullness or squeezing pain in the center of his or her chest lasting more than a few minutes
• Pain spreading to the shoulders, neck or arms
• Lightheadedness, fainting, sweating, nausea or shortness of breath

If you or someone else may be having a heart attack:

• Seek for emergency medical treatment
• Take nitroglycerin, if prescribed. If you think you are having a heart attack and your doctor has previously prescribed nitroglycerin for you, take it as directed. Do not take anyone else's nitroglycerin.
• Begin CPR (Cardio-pulmonary resuscitation) immediately.

Pulmonary embolism
An embolus is an accumulation of foreign material – usually a blood clot that blocks an artery. Tissue death occurs when the tissue supplied by the blocked artery is damaged by the sudden loss of blood. Pulmonary embolism describes the condition that occurs when a clot usually from the veins of the leg or pelvis lodges in an artery of the lung.

Signs and symptoms of pulmonary embolism include:

• Sudden, sharp chest pain that begins or worsens with a deep breath or a cough, often accompanied by shortness of breath
• Sudden, unexplained shortness of breath, even without pain
• Cough that may produce blood-streaked sputum
• Rapid heartbeat
• Anxiety and excessive perspiration

As with a suspected heart attack, seek for emergency medical assistance immediately.

Pneumonia with pleurisy
Frequent signs and symptoms of pneumonia are chest pain accompanied by chills, fever and a cough that may produce bloody or foul-smelling sputum. When pneumonia occurs with an inflammation of the membranes that surround the lung (pleura), you may have considerable chest discomfort when inhaling or coughing. This condition is called pleurisy.

One sign of pleurisy is that the pain is usually relieved temporarily by holding your breath or putting pressure on the painful area of your chest. This is not true of a heart attack. See a doctor if a cough and a fever or chills accompany the chest pain. Pleurisy alone, however, is not a medical emergency.

Chest wall pain
One of the most common varieties of harmless chest pain is chest wall pain. One kind of chest wall pain is costochondritis. It consists of pain and tenderness in and around the cartilage that connects ribs to the breastbone (sternum).

Often, placing pressure over a few points along the margin of the sternum results in considerable tenderness limited to those small areas. If the pressure of a finger duplicates your chest pain, you probably can conclude that a serious cause of chest pain, such as a heart attack, is not responsible.