Sputum is a thick fluid that is produced in the lungs and in the airways that lead to the lungs. Sputum is different than saliva.
A person who has an infection or disease of the respiratory system may cough up sputum. Some diseases can cause pus, blood, or bacteria to show up in the sputum.
|Primary Medical Reviewer||Adam Husney, MD - Family Medicine|
|Specialist Medical Reviewer||Robert L. Cowie, MB, FCP(SA), MD, MSc, MFOM - Pulmonology|
|Current as of||November 1, 2012|
WebMD Medical Reference from Healthwise