Coughing up phlegm after eating can be a sign that the act of eating is irritating or triggering something in the digestive system. Possible causes include food allergies, aspiration, or GERD. Phlegm ...
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 ...