Chest discomfort can be brief and harmless, but it can also be the first warning sign of a medical emergency. If you are asking, “Why does my chest hurt?”, the safest approach is to consider the pattern of the pain and any symptoms occurring with it—not simply assume it is indigestion, stress or a pulled muscle.
Chest pain is a symptom, not a diagnosis. It can come from the heart, lungs, digestive system, muscles, ribs or nerves. Because several conditions can feel similar at first, new, severe or unexplained chest pain deserves medical attention.
When is chest pain an emergency?
Call 911 immediately if you have chest discomfort that lasts more than a few minutes, goes away and returns, or occurs with symptoms such as shortness of breath, sweating, nausea, dizziness or pain spreading to the arm, jaw, neck, back or shoulder.
The CDC and American Heart Association recommend calling 911 when heart-attack symptoms are suspected because faster treatment can reduce damage to the heart muscle.
Chest pain warning signs
| Warning sign | Why it matters |
|---|---|
| Pressure, squeezing, fullness or heaviness | Common description of heart-related chest discomfort |
| Pain spreading to the arm, jaw, neck or back | Can occur during a heart attack |
| Shortness of breath | May occur with or without chest discomfort |
| Cold sweat or nausea | Possible heart-attack symptoms |
| Fainting or severe dizziness | Can signal a serious cardiovascular problem |
| Sudden chest pain with breathing difficulty | May indicate pulmonary embolism or another emergency |
| Sudden severe chest and back pain | Can occur with aortic dissection |
Heart attacks do not always begin with dramatic pain. Symptoms may be mild, may develop gradually, or may disappear and return.
Common causes of chest pain
1. Heart and blood vessel problems
A heart attack occurs when blood flow to part of the heart muscle is severely reduced or blocked. Chest discomfort may feel like pressure, squeezing, fullness or heaviness and can spread to the arm, shoulder, jaw, neck, back or upper abdomen.
Angina can cause similar discomfort when the heart does not receive enough oxygen-rich blood. It often occurs with physical activity or emotional stress and may improve with rest. New, worsening or unexpected angina symptoms require prompt medical evaluation.
Other cardiovascular causes include pericarditis, inflammation around the heart, and aortic dissection, a tear in the wall of the body’s main artery. Aortic dissection can cause sudden, severe chest or upper-back pain and is an emergency.
2. Lung-related causes
A pulmonary embolism (PE) occurs when a blood clot travels to the lungs. Symptoms can include sudden shortness of breath, chest pain that worsens with deep breathing, rapid breathing or a fast heart rate. Coughing, sometimes with blood, dizziness or fainting can also occur.
The risk of blood clots can increase after major surgery, prolonged immobility or long travel, although pulmonary embolism can occur without an obvious trigger.
Pneumonia and pleurisy can also cause sharp chest pain that becomes worse when breathing deeply or coughing. A collapsed lung can cause sudden one-sided chest pain and breathing difficulty.
3. Acid reflux and digestive problems
Gastroesophageal reflux disease (GERD) can cause burning behind the breastbone, particularly after eating or when lying down. A sour taste, burping or regurgitation may occur.
Other digestive problems—including gallstones, esophageal disorders, gastritis and ulcers—can produce discomfort in the upper abdomen or chest.
However, heart-related pain can sometimes feel like indigestion or heartburn. New or unexplained chest discomfort should not automatically be attributed to reflux.
4. Muscles, ribs and nerves
Chest pain can develop after lifting, exercise, coughing, an injury or unusual physical activity. Muscle strain and costochondritis, inflammation where the ribs meet the breastbone, can produce localized pain and tenderness.
Pain that changes with movement or can be reproduced by pressing on the area may make a musculoskeletal cause more likely, but it does not by itself rule out a heart or lung problem.
Shingles can cause burning, tingling or extreme skin sensitivity on one side of the chest before a characteristic rash appears.
5. Anxiety and panic attacks
Panic attacks can cause chest tightness or pain along with a racing heartbeat, sweating, shaking, dizziness and shortness of breath.
The symptoms are real, but new chest pain should not automatically be blamed on anxiety. Particularly when symptoms are different from previous episodes, occur with exertion or are accompanied by significant breathing problems, medical causes should be considered first.
Chest pain: what different patterns may mean
| Chest-pain pattern | Possible causes | What to know |
|---|---|---|
| Pressure or squeezing | Heart attack, angina | Particularly concerning when associated with exertion or other warning signs |
| Burning after meals | GERD, other digestive conditions | Heart-related pain can sometimes feel like indigestion |
| Sharp pain with deep breathing | PE, pneumonia, pleurisy | Sudden breathing difficulty requires urgent evaluation |
| Pain after exercise or lifting | Muscle strain, costochondritis | Reproducible tenderness may suggest a musculoskeletal cause |
| Sudden severe chest/back pain | Aortic dissection and other emergencies | Call 911 |
| Chest tightness with racing heart and fear | Panic attack, heart or other conditions | New symptoms should not automatically be assumed to be anxiety |
| One-sided burning or tingling | Shingles, nerve-related pain | A rash may appear later |
This table is a guide—not a diagnostic tool. Chest-pain symptoms overlap, and serious conditions can sometimes present atypically.
Chest pain in women may look different
Women can experience the same classic heart-attack symptoms as men, but they may also experience symptoms that are easier to mistake for another condition.
Possible symptoms include:
-
Unusual fatigue or weakness
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Shortness of breath
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Nausea or vomiting
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Back, shoulder, arm or jaw discomfort
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Indigestion-like symptoms
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Lightheadedness
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Anxiety
The American Heart Association notes that chest discomfort remains the most common heart-attack symptom in women, but additional symptoms may be less obvious.
What happens when doctors evaluate chest pain?
Doctors typically want to understand when the pain started, what it feels like, where it is located, what triggers it and what makes it better or worse. They may also ask about exercise, meals, breathing, recent travel, surgery, medications and cardiovascular risk factors.
Depending on the situation, testing may include:
| Test | What it can help evaluate |
|---|---|
| ECG/EKG | Electrical activity of the heart and possible signs of acute heart problems |
| Troponin blood test | Evidence of heart-muscle injury |
| Chest X-ray | Pneumonia, collapsed lung and other chest conditions |
| Blood tests | Infection and other possible contributors |
| CT imaging | Conditions such as pulmonary embolism or certain aortic problems |
| Echocardiogram | Heart structure and pumping function |
| Stress testing | Evaluation of suspected coronary artery disease in appropriate patients |
The appropriate tests depend on the symptoms, examination and individual risk factors.
What should you do about unexplained chest pain?
If chest pain is new, severe, persistent, recurring or accompanied by shortness of breath, sweating, nausea, dizziness or pain spreading to another part of the upper body, seek emergency care.
Do not drive yourself if you are seriously unwell. Calling 911 allows emergency medical personnel to begin evaluation and treatment while you are being transported.
For milder symptoms that are clearly associated with a minor injury or a familiar digestive problem, contact your healthcare professional if the pain persists, changes or interferes with normal activities.
Until unexplained chest pain has been evaluated, avoid strenuous exercise and do not use someone else’s prescription heart medication.
The bottom line
There is no single answer to “Why does my chest hurt?” Chest pain can result from something as relatively minor as muscle irritation or reflux, but it can also signal a heart attack, pulmonary embolism, aortic dissection or another medical emergency.
The most important clue is not simply how painful the symptom feels. The pattern, associated symptoms, timing and your individual risk factors all matter.
When chest discomfort is new, unexplained or accompanied by breathing difficulty, sweating, nausea, fainting or pain spreading to the arm, jaw, neck or back, it is safer to seek urgent medical attention than to assume the cause is harmless.
Frequently Asked Questions
Can chest pain be caused by acid reflux?
Yes. GERD can cause burning or discomfort behind the breastbone, often after eating or when lying down. However, heart-related chest discomfort can sometimes feel like heartburn or indigestion, so new or unexplained chest pain should not automatically be attributed to reflux.
How do I know if chest pain is a heart attack?
There is no reliable way to diagnose a heart attack based on symptoms alone. Pressure, squeezing or fullness in the chest—especially when accompanied by shortness of breath, sweating, nausea, dizziness or discomfort in the arm, jaw, neck or back—can be warning signs. Call 911 if you suspect a heart attack.
Can anxiety cause chest pain?
Yes. Panic attacks can cause chest pain or tightness along with a racing heartbeat, sweating, dizziness and shortness of breath. But new or unusual chest pain should not automatically be assumed to be anxiety.
Why does my chest hurt when I breathe?
Sharp pain that worsens with deep breathing can occur with conditions such as pneumonia, pleurisy or pulmonary embolism. If breathing difficulty occurs suddenly or the pain is severe, seek emergency medical care.
When should I call 911 for chest pain?
Call 911 for chest pain or discomfort that is severe, persistent, recurring or associated with shortness of breath, cold sweating, nausea, fainting, severe dizziness or pain spreading to the arm, jaw, neck, back or shoulder.