Tears in the nose are generally considered to be caused by viral colds, allergic rhinitis, sinusitis, nasal or sinus tumors and other disease factors. 1. Viral colds: If the temperature changes greatly, cold or too tired, etc., can cause colds, resulting in the occurrence of viral colds, there will be the symptoms of the nose does not flow tears. 2. Allergic rhinitis: If you suffer from allergic rhinitis, you will usually have symptoms of nasal congestion, resulting in the nose is not ventilated, may also cause allergic conjunctivitis, the symptoms of tears. 3. Sinusitis: If you have sinusitis, your nose will become stuffy due to congestion, enlargement of the turbinates and increased secretions. When sinusitis develops seriously, it may invade the eyes, and symptoms such as swollen eyes and watery eyes may occur. 4. Nasal cavity or sinus tumor: commonly found in nasal polyps, nasal cysts, sinus cancer, etc., due to the inflammation of the nasal mucosa caused by local swelling, the nasolacrimal duct caused by pressure, there will be the symptoms of the nose does not flow tears. If the nose does not flow tears, it is recommended to go to the ear, nose and throat department of the regular hospital as soon as possible, to clarify the cause and timely treatment.