Chest pain is one of the most common reasons people visit emergency rooms, but not all chest pain signals a heart attack. The chest houses the heart, lungs, esophagus, and many muscles and nerves, any of which can be the source of pain. Identifying the characteristics of the pain (location, quality, triggers, duration) helps narrow down the cause, though a medical evaluation is always important when chest pain is new or unexplained.

1. Heart Attack (Myocardial Infarction)

What it is: A blockage of blood flow to part of the heart muscle, causing damage to the cardiac tissue.

Why it happens: Most heart attacks occur when a plaque (cholesterol deposit) in a coronary artery ruptures and forms a blood clot, blocking blood flow.

Common symptoms: Pressure, squeezing, or crushing pain in the center or left side of the chest; pain radiating to the left arm, jaw, neck, or back; shortness of breath; cold sweat; nausea; lightheadedness. Women may experience atypical symptoms such as fatigue, nausea, and back pain without classic chest pressure.

Risk factors: High blood pressure, high cholesterol, diabetes, smoking, obesity, family history of heart disease, age over 45 (men) or 55 (women).

When to seek evaluation: This is always a medical emergency. Call 911 immediately.

2. Angina (Stable and Unstable)

What it is: Chest pain or discomfort caused by reduced blood flow to the heart muscle, usually due to coronary artery disease.

Why it happens: Narrowed coronary arteries (from plaque buildup) limit blood flow during periods of increased demand, such as physical exertion or emotional stress. Stable angina is predictable and occurs with a known level of exertion. Unstable angina occurs at rest or with minimal exertion and is less predictable, it requires urgent evaluation.

Common symptoms: Tightness, pressure, or aching in the chest, often triggered by exertion, cold weather, or stress; usually subsides with rest or nitroglycerin within a few minutes.

Risk factors: Same as heart attack risk factors; known coronary artery disease.

When to seek evaluation: New or worsening chest pain with exertion should be evaluated promptly. Unstable angina, chest pain at rest, new severe pain, or pain that is worsening, is a medical emergency: call 911 or go to the emergency room immediately.

3. Gastroesophageal Reflux Disease (GERD) / Heartburn

What it is: Burning chest pain caused by stomach acid rising into the esophagus.

Why it happens: The lower esophageal sphincter (a muscular valve between the esophagus and stomach) relaxes inappropriately, allowing acid reflux. Certain foods, large meals, lying down after eating, or obesity can trigger this.

Common symptoms: Burning sensation in the chest (heartburn), often after eating or when lying down; sour or acidic taste in the mouth; pain that improves with antacids; may be associated with regurgitation.

Risk factors: Obesity, pregnancy, smoking, eating spicy or fatty foods, alcohol, caffeine, lying down within 2-3 hours of eating.

When to seek evaluation: If chest pain occurs with meals and is relieved by antacids, GERD is likely, but because acid reflux can mimic cardiac symptoms, always have new chest pain evaluated by a provider if in doubt.

4. Costochondritis (Chest Wall Pain)

What it is: Inflammation of the cartilage connecting the ribs to the breastbone (sternum), causing chest wall pain.

Why it happens: Often related to physical strain, injury, heavy lifting, or a respiratory infection. Sometimes no specific cause is found.

Common symptoms: Sharp or aching pain along the sides of the sternum; pain that worsens when pressing on the area, taking deep breaths, or coughing; typically affects the left side of the chest but can be bilateral.

Risk factors: Recent physical activity, upper respiratory infection, direct chest trauma.

When to seek evaluation: Costochondritis is benign but a medical evaluation is important to rule out other causes of chest pain. If pressing on the chest reproduces the pain, this is a helpful distinguishing feature providers look for.

5. Anxiety and Panic Attacks

What it is: Intense anxiety or panic episodes that trigger a range of physical sensations including chest tightness or pain.

Why it happens: The "fight-or-flight" stress response causes the heart to beat faster, muscles to tense, and breathing to quicken. This combination creates sensations that can feel remarkably similar to cardiac symptoms.

Common symptoms: Chest tightness or pain, racing heart, shortness of breath, dizziness, tingling in the hands or face, feeling of impending doom; symptoms typically peak within 10 minutes and resolve within 20-30 minutes.

Risk factors: History of anxiety or panic disorder, significant life stress, history of trauma, certain medications or stimulants.

When to seek evaluation: Because panic attacks mimic cardiac events, always seek evaluation for new chest pain to rule out a cardiac cause. Once a cardiac cause is excluded, mental health treatment is highly effective for panic disorder.

6. Pulmonary Embolism (Blood Clot in the Lung)

What it is: A blockage in one of the pulmonary arteries in the lungs, typically caused by a blood clot that travels from the legs.

Why it happens: Deep vein thrombosis (DVT), clots forming in the leg veins, can break off and travel to the lungs. Risk is elevated by prolonged immobility, recent surgery, certain cancers, or clotting disorders.

Common symptoms: Sudden chest pain (often sharp, worsening with breathing); shortness of breath; coughing up blood; rapid heart rate; feeling faint.

Risk factors: Long-haul travel, recent surgery, immobility, pregnancy, cancer, oral contraceptive use, personal or family history of clotting disorders.

When to seek evaluation: Pulmonary embolism is a life-threatening emergency. For sudden chest pain with shortness of breath, call 911 or go to the emergency room immediately.

7. Pleuritis (Pleurisy)

What it is: Inflammation of the pleura, the two-layered membrane surrounding the lungs, causing sharp chest pain.

Why it happens: Usually follows a viral or bacterial respiratory infection. The inflamed layers rub against each other during breathing, causing sharp pain.

Common symptoms: Sharp, stabbing chest pain that worsens with breathing, coughing, or sneezing; pain may radiate to the shoulder; shallow breathing to minimize pain.

Risk factors: Recent respiratory infection, autoimmune conditions (lupus, rheumatoid arthritis), pulmonary embolism.

When to seek evaluation: Pleuritic chest pain should be evaluated to identify the underlying cause.

When to Seek Medical Care

Chest pain can range from a true emergency to a minor, self-limited nuisance. The two lists below separate situations that need 911 or the ER right now from ones where a scheduled visit to your provider is the appropriate next step.

When in doubt, treat new or unexplained chest pain as a reason to call 911 or seek emergency care, it is always safer to be evaluated and find a benign cause than to delay care for a true cardiac or pulmonary emergency.

Related Articles:
Causes of Shortness of Breath | Hypertension (High Blood Pressure) | GERD (Acid Reflux): Overview, Causes, and Management | Panic Attacks and Panic Disorder