Long-term nasal congestion should be alert to chronic rhinitis, sinusitis, nasal septum deviation, nasal tumors and other diseases. 1. Chronic rhinitis: nasal congestion due to long-term inflammation of the nasal cavity, causing local tissue congestion, swelling, increased secretions blocking the nostrils. 2. Sinusitis: sinus mucosa due to inflammation caused by congestion, swelling, purulent secretions, so long-term nasal congestion, headache, decreased sense of smell and other symptoms. 3. Deviated nasal septum: the structure of nasal septum is abnormally shifted to one side, so it leads to long-term nasal congestion and may cause nosebleed. 4. Nasal cavity and sinus tumor: Tumors in the nasal cavity and sinus, such as polyps, cysts, hemangiomas, malignant tumors, etc., can cause nasal congestion. Long-term nasal congestion may also be other diseases, it is recommended to consult a doctor in a timely manner to identify the cause of the disease and follow the doctor’s instructions for treatment.