Nasal congestion is a common clinical symptom with complex etiology, and many diseases can manifest as nasal congestion, for example, the following: the first, recurrent acute rhinitis or chronic rhinitis. The second, chronic diseases of the nasal cavity or sinuses, such as chronic purulent sinusitis, severe deviation of the nasal septum. The third, adjacent infectious lesions, such as chronic tonsillitis, adenoid hypertrophy, etc. The fourth, improper or prolonged nasal medication, such as long-term use of nasal drops or ephedrine drops leading to drug rhinitis. The fifth, environmental and occupational causes long-term inhalation of allergic factors, such as dust, harmful chemical gases, and rapid changes in temperature or humidity, etc. Sixth, systemic diseases can also lead to nasal congestion, such as anemia, diabetes, rheumatism, tuberculosis, heart, liver and kidney diseases and plant nerve dysfunction, causing long-term stasis of nasal mucosa blood vessels leading to nasal congestion, as well as vitamin A, vitamin C deficiency, hypothyroidism, late pregnancy and puberty. The seventh, other factors, such as tobacco and alcohol addiction, excessive fatigue, immune dysfunction, etc.