What Is The Difference Between Phlegm And Sputum?
What Is The Difference Between Phlegm And Sputum? Sputum is produced when a person’s lungs are diseased or damaged. Sputum is not saliva but the thick mucus – sometimes called phlegm – which is coughed up from the lungs. What color of phlegm is bad? Red or pink phlegm can be a more serious warning