"Hearst Magazines and AOL may earn commission or revenue on some items through these links." There’s no way around it: Coughing up phlegm feels gross, especially if you’re already dealing with other ...

Clear, bubbly phlegm does not typically indicate a problem. However, coughing up large amounts could indicate an underlying health issue, such as fluid in the lungs. Phlegm, or sputum, is a type of ...

Mucus is a thin, slippery fluid that lines the nose, throat, and other passages to trap dust and germs. Phlegm is a thicker type of mucus produced in the lungs to catch and remove harmful particles ...

Phlegm is a form of respiratory mucus produced by the lungs. The airways between the larynx and the respiratory bronchioles are lined by columnar epithelium over which an airway surface liquid (ASL) ...

After 12 weeks of nebulized NAC, patients’ mean phlegm scores, as measured by the COPD assessment test, significantly decreased from 3.47 at baseline to 2.62. N-acetylcysteine (NAC) nebulizer therapy ...