Phlegm buildup in the lungs and throat is a common problem, especially during colds, allergies, pollution exposure, or respiratory infections. Phlegm is a thick mucus produced by the respiratory ...

Drinking warm fluids like tea can help loosen thickened mucus in the lungs. Inhaling moist air using a humidifier or steam can make it easier to cough up and remove lung mucus. Controlled coughing ...