R00-R09: Symptoms and signs involving the circulatory and respiratory systems

R04: Haemorrhage from respiratory passages

Haemorrhage from respiratory passages is a group of medical conditions where bleeding occurs from different parts of the respiratory tract. This can happen in your nose, throat, windpipe, or lungs. The bleeding could be due to many causes such as traumas, infections, tumors, abnormalities of the blood vessels, or certain medical conditions that affect clotting. Common symptoms of these conditions typically include coughing, and depending on where the bleeding is, you might cough up blood or have blood-streaked mucus. Over time, if not managed, this can lead to complications such as anemia or low oxygen levels in the blood due to loss of blood or the disruption of normal breathing patterns. It's important to note that the appearance of blood from the respiratory passages always warrants a comprehensive medical evaluation, to pinpoint the source of bleeding and to identify any underlying conditions contributing to the problem.