Sputum: Definition, colors, causes, and when to see a doctor

Sputum is a type of thick mucus produced by the lungs. This article explains the types of sputum, what causes changes, and when to speak with a doctor.

Yellow or Green Snot and Phlegm: What Mucus Color Means

Green, Yellow, and Brown Phlegm: What Does it Mean?

Coughing Up Phlegm: Causes and Treatment

Routine sputum culture Information

Color of the phlegm can indicate degree of lung inflammation in

Marvels of Mucus and Phlegm

Is it allergies, COVID-19 or something else? What your mucus might

COPD: Causes, Symptoms, Diagnosis, Treatment & Prevention

What Does the Color of My Phlegm Mean?

Black Mucus and Phlegm

Is it allergies, COVID-19 or something else? What your mucus might

Difference between Parallel Projection and Perspective Projection

Sputum examination

Sputum: Definition, colors, causes, and when to see a doctor