Nasal congestion is not necessarily due to rhinitis, but may also be caused by nasal polyps, deviated septum, nasal or sinus tumors. 1. Rhinitis: Inflammation of the nasal cavity due to infection, allergy and other reasons, resulting in nasal mucosal congestion, edema, nasal congestion, may also be accompanied by symptoms of a runny nose. 2. Nasal polyps: chronic nasal inflammation stimulation leads to nasal polyps, polyp size is relatively large, resulting in blockage of the nasal cavity caused by nasal congestion. 3. Deviated nasal septum: Congenital abnormalities in the structure of the nasal septum or traumatic injuries lead to deviated nasal septum, which manifests itself as nasal congestion. 4. Nasal cavity and sinus tumor: Nasal cavity and sinus tumor will cause nasal congestion, and the condition will be aggravated gradually. Patients with nasal congestion are advised to seek medical treatment as soon as possible to find out the cause of the disease and follow the doctor’s instructions to give standardized treatment.