 symptoms of blood clots in the lungs include difficulty breathing chest pain that worsens with a deep breath or a cough coughing up blood and a faster than normal or irregular heartbeat speak with a doctor about your risk for blood clots and seek medical attention if you have any symptoms on average one person in the united states dies of a blood clot every six minutes don't let that be you or someone you know stop the clot spread the word learn more at stop the clot.org spread the word