What Happens If a Blood Clot Blocks Your Lung? | Pulmonary Embolism

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Shared February 25, 2026

What happens if a blood clot suddenly blocks your lung? This life-threatening condition is called pulmonary embolism. A pulmonary embolism occurs when a blood clot, often from the leg (deep vein thrombosis), travels to the lungs and blocks blood flow. Oxygen levels drop, the heart strains to pump harder, and sudden chest pain or shortness of breath may occur within minutes. In this medical short, we explain what happens inside the body during a pulmonary embolism and why immediate treatment is critical. Recognizing the signs early can save lives. #PulmonaryEmbolism #BloodClot #MedicalEmergency #LungClot #MedicalShorts #Shorts