Common Causes of Chest pain
1. Coronary Artery Disease & Angina
Chest discomfort caused by reduced blood flow to the heart may occur during physical exertion, emotional stress, climbing stairs or walking uphill. Possible associated symptoms: breathlessness, sweating, nausea and radiation to the arm, shoulder, jaw or back.
2. Acute Coronary Syndrome / Heart Attack
A heart attack may present as new chest pressure, persistent heaviness, tightness, burning or discomfort with breathlessness, sweating, nausea or sudden unexplained weakness. Not every heart attack produces dramatic crushing pain.
3. Acid Reflux / GERD
Gastro-oesophageal reflux causes burning behind the breastbone, sour taste, symptoms after meals and worse symptoms when lying down. However, reflux and heart pain can overlap. Never assume new chest pain is acidity without appropriate assessment.
4. Musculoskeletal Chest Pain
Muscle strain, costochondritis, rib injury, poor posture and exercise-related strain cause chest pain that may worsen with movement, deep breathing or pressing the affected area.
5. Lung & Pleural Causes
Chest pain may arise from pneumonia, pleurisy, pneumothorax, pulmonary embolism and other pulmonary disorders. Pain often worsens during breathing.
6. Anxiety & Panic
Anxiety may cause chest tightness, palpitations, rapid breathing, tingling, dizziness and a sense of impending danger. However, anxiety should not be diagnosed until important physical causes have been reasonably considered.
7. Pericarditis
Inflammation of the sac surrounding the heart causes sharp chest pain, often improved by leaning forward and worsened by lying flat. May follow a viral illness.
⚠️ When Should You Seek Medical Care?
Seek urgent medical attention if you experience any of the following:
- 🚨 New, severe or persistent chest pain — call emergency services immediately
- 🚨 Chest pain triggered by exertion or that occurs at rest
- 🚨 Chest pain with breathlessness, sweating or fainting
- 🚨 Chest pain radiating to the arm, jaw, shoulder or back
- 🚨 Chest pain with nausea or vomiting
- 🚨 Chest pain with sudden severe weakness
- 🚨 Chest pain with coughing blood
- 🚨 Sudden severe breathlessness with chest pain
- 🚨 Chest pain with neurological symptoms (weakness, confusion, slurred speech)
- 🚨 Do NOT wait for a blood-test appointment if a heart attack is suspected
Which Laboratory Tests May Be Considered?
Clinical note: Laboratory tests should be selected by a doctor based on your symptoms, history and clinical examination. Not every person requires all of the tests listed below.
| Test | Why a Doctor May Consider It |
|---|---|
| High-Sensitivity Cardiac Troponin | Key biomarker for myocardial injury — used in emergency evaluation of possible heart attack. Repeat testing is often needed. |
| ECG (Electrocardiogram) | First-line investigation for suspected cardiac cause — not a laboratory blood test but essential |
| CBC | Anaemia can contribute to chest symptoms; infection markers |
| Blood Glucose / HbA1c | Diabetes is a major cardiovascular risk factor |
| Lipid Profile | Cholesterol assessment for cardiovascular risk evaluation |
| Kidney Function Tests | For overall cardiovascular risk and medication safety |
| D-Dimer | Only in appropriately selected patients based on clinical probability of pulmonary embolism — not a routine test |
| CRP / ESR | For inflammatory causes (pericarditis, myocarditis) |
Frequently Asked Questions
How do I know if chest pain is a heart attack?
You cannot reliably distinguish heart attack from other causes at home. New, severe or exertion-related chest pain — especially with breathlessness, sweating or arm/jaw radiation — requires emergency evaluation. Do not self-diagnose.
Can a normal ECG rule out a heart attack?
No. A single normal ECG or a single early troponin result does not always exclude acute coronary syndrome. Clinical timing and repeat assessment matter.
Can gas or acidity cause chest pain?
Yes. Acid reflux (GERD) and oesophageal spasm can cause significant chest pain. However, these should only be concluded after cardiac causes have been appropriately assessed.
Is left-sided chest pain always from the heart?
No. The location alone does not determine the cause. Musculoskeletal pain, lung problems and digestive issues can all cause left-sided chest pain.
QXL Diagnostic Support
Chest pain cannot be evaluated adequately with blood tests alone. If your doctor recommends cardiac markers, lipid profile, blood glucose or inflammatory tests, QXL Diagnostics provides NABL-accredited testing with home collection across Bengaluru.
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Medical Review
Medically reviewed by: Dr. Shantakumar Muruda, MD - Medical Biochemistry; Founder & CEO, QXL Diagnostics Super Speciality Lab, Bengaluru
Last medically reviewed: 2026-09-11
Clinical reference framework:Harrison's Principles of Internal Medicine; Tietz Fundamentals of Clinical Chemistry and Molecular Diagnostics; and relevant specialty guidance as clinically appropriate.
Medical Disclaimer: This information is intended for general health education and does not diagnose an individual medical condition. It does not replace consultation, diagnosis or treatment by a qualified healthcare professional. Seek urgent medical attention for severe, sudden or rapidly worsening symptoms or any emergency warning signs described above.