symptoms of phlegm in lungs
Some of the comorbid or associated medical symptoms for Increased chest phlegm may include these symptoms: 1  Heart symptoms. 2  Chronic cough. 3  Cough. Head symptoms.  Increased 1  cough. Lung symptoms.  Respiratory 1  symptoms. Sputum symptoms.  Throat 1  symptoms. Wet  cough. more associated symptoms...Â».
Quick Answer. Phlegm often occurs due to an infection of the lungs or sinuses, such as strep throat, the flu, sinusitis or the common cold, according to Healthgrades. Allergies, inflammation, tonsillitis, reactions to some medications, exposure to secondhand smoke, trauma, asthma, gastric reflux, bronchitis or laryngitis can also cause phlegm.