Chest mucus, or phlegm, is a common symptom that often accompanies colds, flu, allergies, or respiratory infections. While mucus plays a protective role in trapping dust and pathogens, too much of it ...
Mucus is your body’s natural defence, but too much of it can make breathing feel like you’re inhaling through a wet sponge. Your lungs produce mucus every day to trap dust, germs, and irritants.