Sputum is a thick substance that accumulates when bacteria or fungi grows and multiples in the lungs or bronchi. The developing material may make breathing difficult and induce coughing as it builds. As it accumulates, the growing substance can make breathing more difficult and cause coughing.
Sputum is a thick substance that accumulates when bacteria or fungi grows and multiples in the lungs or bronchi. The developing material may make breathing difficult and induce coughing as it builds. As it accumulates, the growing substance can make breathing more difficult and cause coughing.