This results in the familiar symptoms of runny nose, congestion, and coughing up phlegm. Respiratory infections, including COVID-19, are a common cause of inflammation resulting in a productive cough.

Phlegm, also known as sputum, is a kind of mucus made in your chest and usually comes out when you cough it up during colds ...

Perform light coughing exercises to familiarize ... The restricted airflow caused by the phlegm will produce a growl-like, raspy sound. Be mindful not to overdo this technique, which can cause ...