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Rhinorrhea is characterized by an excess amount of mucus produced by the mucous membranes that line the nasal cavities. The membranes create mucus faster than it can be processed, causing a backup of mucus in the nasal cavities. As the cavity fills up, it blocks off the air passageway, causing difficulty breathing through the nose.
This causes the mucus to get thicker and more difficult to clear. It can also cause a cascade that includes releasing "histamine and other secondary proteins to make the nose or throat swollen and ...
"You can have bright yellow, dark green mucus, even with viruses." Pink or red . This typically means there's blood in your mucus, Elliott says, "usually because the nasal passages are too dry and ...
Post-nasal drip (PND), also known as upper airway cough syndrome (UACS), occurs when excessive mucus is produced by the nasal mucosa.The excess mucus accumulates in the back of the nose, and eventually in the throat once it drips down the back of the throat.
Mucus is a normal protective layering around the airway, eye, nasal turbinate, and urogenital tract. Mucus is an adhesive viscoelastic gel produced in the airway by submucosal glands and goblet cells and is principally water. It also contains high-molecular weight mucous glycoproteins that form linear polymers.
Other causes can include acid reflux, asthma, allergies, or other chronic medical conditions, adds Richard Watkins, M.D., ... notice thick green or yellow mucus, run a fever, and/or feel extremely ...