When you’re sick, you’ll often produce more phlegm, and might notice it’s thicker or a different colour: white, green, yellow or maybe even brown. What can this phlegm – also called mucus, snot, ...

Bronchiectasis is a chronic lung condition in which your airways, or bronchi, widen permanently and become scarred. It may cause a persistent cough, large daily production of mucus (sputum or phlegm), ...