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A 38-year-old member asked:

What causes a white frothy sputum in a child's cough?

1 doctor answer1 doctor weighed in
Dr. Powlin Manuel
Allergy and Immunology 52 years experience
Mucus production: The cause of white frothy sputum with cough is due to mucus production in the lungs, nose, and sinus. This is the way our immune system gets rid of unwanted and harmful agents who enter our respiratory system. This defensive mechanism is conducted by the immune cells lining the airway with specific antibodies to protect; mucus contains products to kill the agents as well as to wash them away.

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Last updated Feb 21, 2020


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