Coughing blood can be a frightening symptom that may indicate different health conditions ranging from mild infections to serious lung problems. Understanding the warning signs linked with coughing blood can help people recognize when medical attention may be necessary. Small streaks of blood in mucus may sometimes result from irritation.
Coughing blood, medically known as hemoptysis, occurs when blood is expelled from the lungs or respiratory tract during coughing. The amount of blood can vary from small streaks mixed with mucus to more noticeable bleeding. While minor irritation may sometimes cause light bleeding, persistent or heavy coughing of blood may indicate a more serious health condition that requires medical evaluation.