The causes of chronic rhinitis are quite complex and not due to a single factor. It often arises from multiple factors after prolonged and repeated acute attacks, leading to chronic inflammatory changes. These changes primarily affect the nasal mucosa, with the most common causes including: First, prolonged and repeated bouts of acute rhinitis that are not thoroughly treated can lead to chronic rhinitis. This also includes some chronic diseases of the nasal cavity and sinuses, such as congenital deviation of the nasal septum, meaning the middle part of the nose is crooked, which disrupts drainage and airflow in the nasal cavity. Thus, when there is an acute inflammation, the secretions cannot be drained timely, eventually causing chronic inflammation of the nasal mucosa. Second, inflammation of nearby tissues and organs can lead to chronic rhinitis, such as chronic tonsillitis and adenoid hyperplasia during childhood. These chronic inflammations can cause secretions in the nasopharyngeal area to irritate and contribute to the chronic inflammation of the nasal mucous membrane, impacting each other. Third, occupational and environmental factors play a role. The living and working environment, along with lifestyle habits, greatly influence the incidence of chronic rhinitis. People who frequently smoke or drink alcohol are more susceptible to this condition. Additionally, if the work or living environment is polluted, dirty, dusty, or exposed to other harmful gases or chemicals, it may also lead to chronic rhinitis. Therefore, the formation of chronic rhinitis involves multifaceted and multiple causes, and the specific reasons should be analyzed based on different patients.