Where Phlegm Comes from?

Mucus and phlegm are made of water, antibodies, enzymes, proteins and salt. They carry dead cells, dust and other debris from the nose and lungs. When you breathe through your nose, 80 percent of particles are filtered through the mucus lining.

How do I stop mucus production?

Is it good to cough up phlegm?

Coughing and blowing your nose are the best ways to help mucus fight the good fight. “Coughing is good,” Dr. Boucher says. “When you cough up mucus when you are sick, you are essentially clearing the bad guys—viruses or bacteria—from your body.”