What Causes Mucus To Build Up In Your Sinuses

There are many reasons a person may experience mucus in throat after eating, including food allergies, post-nasal drip, medication side effects, chronic rhinitis, laryngopharyngeal reflux, being a... What causes catarrh? Catarrh is usually caused by the immune system reacting to an infection or irritation, which causes the lining of your nose and throat to become swollen and produce mucus. This can be triggered by: a cold or other infections; hay fever or other types of allergic rhinitis; non-allergic rhinitis; nasal polyps There are several causes for the buildup of mucus in your lungs such as: Infections. It is common to have excess mucus in your lungs when there is an infection such as cold, flu, or bacterial pneumonia. Gastroesophageal reflux disease.

If you have this condition, the acid in your stomach comes up the tube connecting your stomach, throat, and mouth.