why am i coughing up blood
Coughing up blood (hemoptysis) can be a sign of a serious medical condition. Infections, cancer, and problems in blood vessels or in the lungs themselves can be responsible. Coughing up blood generally requires medical evaluation unless the hemoptysis is due to bronchitis.auses for coughing blood include: 1  Bronchitis (acute or chronic), the most common cause of coughing up blood. 2  Hemoptysis due to bronchitis is rarely life-threatening. 3  Bronchiectasis.