There are many reasons for the formation of rhinitis, including infections, anatomical abnormalities of the nasal cavity, infections of neighboring foci, occupational and environmental factors, and so on. 1. Infection: Rhinitis is mostly caused by viral infection, including rhinovirus, influenza virus, parainfluenza virus, etc. Acute rhinitis occurs. If acute rhinitis is not treated in time, it can migrate to chronic rhinitis. 2. Nasal anatomical abnormality: severe nasal septum deviation, middle turbinate hyperpneumatization, etc., can damage the function of nasal mucosa, so that the nasal mucosa is more prone to recurrent infections and difficult to cure. 3. Infection of neighboring foci: Inflammation of neighboring organs in the nasal cavity can spread to the nasal cavity, causing rhinitis, such as chronic tonsillitis, sinusitis, adenoiditis, etc. 4. Occupational and environmental factors: long-term or repeated inhalation of dust and harmful gases and other poor working or living environment can lead to rhinitis. In addition to the above reasons, the occurrence of rhinitis is also related to frequent nose picking, diabetes and other systemic diseases, improper use of drugs and other factors. If you have nasal congestion, runny nose, burning sensation in the nose and other symptoms of rhinitis, you should consult a doctor in time, complete the relevant examinations, clarify the cause of the disease, and make appropriate treatment and therapy.