The causes of rhinitis are different for each type of rhinitis, specifically the following: 1. Allergic rhinitis, induced by allergic reactions in the patient’s body, mainly due to allergic reactions in the nasal cavity induced by exposure to allergic substances in the patient’s nasal cavity, thus inducing allergic rhinitis. 2. The main reason for this is that the patient’s nasal mucosa is thickened and the nasal bones are enlarged due to the stimulation of long-term rhinitis, resulting in poor ventilation of the nasal cavity. 4. Atrophic rhinitis may be related to the patient’s family genetic history, the patient’s personal constitution and the patient’s lack of vitamins. In short, patients with rhinitis are caused by local or physical reasons for the patient’s nasal cavity.