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Does coughing up blood (hemoptysis) always come from bleeding in the lungs and airways?

ANSWER

Hemoptysis can also come from bleeding outside the lungs and airways. Severe nosebleeds or vomiting of blood from the stomach can result in blood draining into the windpipe (trachea). The blood is then coughed up, appearing as hemoptysis.

SOURCES:

Mason, R. Murray and Nadel’s Textbook of Respiratory Medicine, 5th edition, Saunders, 2010. Cahill, B.C. Clinics in Chest Medicine, 1994; vol 15: pp 147-167.

Hirshberg, B. Chest, 1997; vol 112: pp 440-444.

Adelman, M. Annals of Internal Medicine, 1985; vol 102: pp 829-834.

Chang, J.C. Sarcoidosis, 1987; vol 4: pp 49-54.

Reviewed by Brunilda Nazario on July 20, 2020

SOURCES:

Mason, R. Murray and Nadel’s Textbook of Respiratory Medicine, 5th edition, Saunders, 2010. Cahill, B.C. Clinics in Chest Medicine, 1994; vol 15: pp 147-167.

Hirshberg, B. Chest, 1997; vol 112: pp 440-444.

Adelman, M. Annals of Internal Medicine, 1985; vol 102: pp 829-834.

Chang, J.C. Sarcoidosis, 1987; vol 4: pp 49-54.

Reviewed by Brunilda Nazario on July 20, 2020

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Is the cause of coughing up blood (hemoptysis) always known?

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