Coughing up mucus is often a sign of a respiratory infection, allergies, gastroesophageal reflux disease (GERD), or an environmental irritant like smoke or pollution.

Mature african american man coughing while sitting on sofa in living room at home. Sick with a cold or flu senior bearded male feels bad, holds his hand to his chest. He has a bronchitis. Close up ...

Heart Problems Sometimes, coughing can be a sign of heart failure. If you have a cardiac cough, you may cough up white mucus ...

If you’re coughing up brown mucus, though ... the bronchial tubes which carry air from your nose to your lungs). Black mucus can materialise after inhaling dirt or dust; or after smoking ...

These membranes produce mucus that traps irritants in the airways and helps your body expel them through coughing. A COVID-19 infection can inflame the lung tissues, including the alveoli. The alveoli ...

To use huff coughing to clear mucus in the lungs: Take a deep, slow breath to fully expand your lungs. Tense your stomach muscles Exhale three times very quickly and make a "ha" sound with each breath ...