What is Sputum? *EXPLAINED*

Sputum is a substance that is produced in the lungs and respiratory tract. It is a mixture of saliva and mucus, along with other substances like dead cells, bacteria, and other debris. Sputum is typically coughed up from the lungs and expelled through the mouth. Its color, consistency, and odor can vary depending on the underlying cause of its production. Doctors may analyze sputum samples to help diagnose respiratory conditions such as infections, allergies, or chronic lung diseases.