Hemoptysis refers to coughing up blood from some part of the lungs (respiratory tract). Blood coming from elsewhere, such as your stomach, can mimic coughing up blood. It's important for your doctor to determine the site of the bleeding, and then determine why you're coughing up blood.

The major cause of coughing up blood is chronic bronchitis or bronchiectasis. Other possible causes of coughing up blood include:

  1. COPD
  2. Cystic fibrosis
  3. Drug use, such as crack cocaine
  4. Emphysema
  5. Foreign body
  6. Lung abscess
  7. Lung cancer
  8. Mitral valve stenosis
  9. Parasitic infection
  10. Pneumonia
  11. Pulmonary embolism
  12. Trauma to the chest
  13. Tuberculosis
  14. Wegener's granulomatosis

Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.

May. 08, 2012