Chronic pharyngitis is a common condition that causes mucus to rise in the throat, a diffuse pharyngeal lesion caused by a chronic infection, mainly inflammation of the mucous membranes of the pharynx. The most typical symptom is mucus in the throat. Chronic pharyngitis can also be a local manifestation of certain systemic diseases, such as anemia, diabetes, cirrhosis and chronic nephritis. So what are the main causes of this symptom that can lead to mucus in the throat? 1, the recurrence of acute pharyngitis This is the main reason for chronic pharyngitis. 2, pharynx adjacent to the upper respiratory tract lesions such as nasal cavity, sinus, nasopharynx, chronic inflammation, can be due to inflammatory secretions through the posterior nostril backflow to the pharynx to stimulate the pharyngeal mucosa; chronic rhinitis, deviated septum, chronic sinusitis, adenoid hypertrophy, snoring, or nasal sinus and nasopharyngeal occupational lesions due to the impact of nasal ventilation, resulting in long-term open-mouth breathing, causing the pharyngeal mucous membrane long-term over-drying and resulting in chronic pharyngitis; chronic tonsillitis; chronic tonsillaritis; chronic pharyngeal mucosa, the main cause of the pharyngeal mucous membrane. Pharyngitis; chronic inflammation of chronic tonsillitis can spread directly to the back wall of the pharynx, causing chronic pharyngitis; oral inflammation if not controlled in time, with the proliferation of inflammation can also lead to chronic pharyngitis. 3, climate and regional environmental changes temperature, humidity changes, poor air quality, tobacco and alcohol stimulation, spicy and irritating food, dust, harmful gases and radioactive irradiation are also causes of chronic pharyngitis. 4.Occupational factors Long-term use of a large number of people such as teachers, singers and susceptible to physical factors can also cause this disease. 5.Systemic factors such as anemia, dyspepsia, gastroesophageal reflux, heart disease (due to blood circulation disorders affecting pharyngeal venous reflux resulting in localized pharyngeal stagnation), chronic bronchitis, bronchial asthma, rheumatism, liver, kidney disease, etc., can also cause chronic pharyngitis. Endocrine disorders, autonomic dysregulation, odoriferous nose bacillus and diphtheria-like bacillus infection, vitamin deficiency and immune dysfunction are related to atrophic and dry pharyngitis. Allergic factors Inhalation allergens (including seasonal and perennial allergens), drugs, chemical irritants in the work environment and food allergens can cause allergic pharyngitis.