Rhinorrhea, commonly known as a runny nose, is a symptom of the common cold and may also result from allergies (hay fever). The term comes from the Greek words "rhinos" meaning "of the nose" and "rhoia" meaning "a flowing." Human nose in profile A typical bulbous human nose, here used to support a pair of glasses. ... The term symptom (from the Greek syn = con/plus and pipto = fall, together meaning co-exist) has two similar meanings in the context of physical and mental health: Strictly, a symptom is a sensation or change in health function experienced by a patient. ... Acute nasopharyngitis, often known as the common cold, is a mild viral infectious disease of the upper respiratory system (nose and throat). ... This article needs cleanup. ... 2006 Theatre Royal, Haymarket production (C) Bill Kenwright Ltd. ...
Can also be a sign of withdrawal, such as from opioids. [1]
The nose is lined or covered by a delicate tissue called "mucosa" which produces mucus (the sticky, slippery secretions) to protect the nose.
The allergic runnynose might also be associated with watery and itchy eyes, sneezing, asthma, rubbing of the nose and a lot of clear mucus.
The runnynose usually starts with clear mucus and then becomes whitish or greenish as the cold dries up and gets better, (as the body mounts its defenses against the virus, the white blood cells enter the mucus and give it the green color).
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