Spitting foam

Foamy spit refers to the foamy sputum produced. Sputum is a secretion of the respiratory tract, and healthy people generally have sputum. However, if you suffer from respiratory diseases, a large amount of sputum will be produced after being infected by pathogenic microorganisms, which will be more frequent than the cold season, and cough and sputum will appear, especially in the morning. The sputum will be white mucus foam.

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