When patients have the condition of rhinitis, it often causes increased secretion of nasal mucosa and glands, and more clear water-like, mucus-like and mucopurulent nasal mucus may appear in the nasal passages for the following reasons: 1. Inflammatory factors: For patients with acute rhinitis and allergic rhinitis, the increase is often clear water-like nasal mucus, and when patients have chronic rhinitis and further sinusitis condition, it often Mucus, mucopurulent nasal discharge will appear. 2, infection factors: nasal mucosa because of the factors of viral and bacterial infection, because of contact with a variety of polluting, irritating, allergic material particles, resulting in the symptoms of increased nasal discharge occurred. When rhinitis patients undergo medication and improvement, the symptom performance of nasal discharge will be reduced accordingly, or even disappear completely.