For the symptomatic manifestation of running clear nose and running yellow nose, there is a difference in its nasal etiology. The symptom of running clear nose is often seen in acute rhinitis, allergic rhinitis patients, because of cold, suffered respiratory viral infections, as well as the nasal mucosa contact with the air environment of a variety of polluting, irritating, allergic substances, and cause acute rhinitis, allergic rhinitis symptoms, nasal congestion, itchy nose, as well as paroxysmal sneezing, running watery nose, and other symptoms. If the symptom of yellow nasal discharge occurs, it means that there is secondary bacterial infection, which is mostly seen in patients with sinusitis, in which yellow purulent secretions from the sinuses are gradually drained into the nasal passages and cause the symptoms of yellow nasal discharge.