Nasal dyspnea may be caused by upper respiratory tract infection, allergic rhinitis, nasal polyps and other diseases. 1. Upper respiratory tract infection: it can be caused by infection of influenza virus, respiratory syncytial virus, etc. When the disease may lead to edema and congestion of the nasal mucosa, causing the nose to be out of breath, and the disease may also cause coughing, runny nose and other symptoms. 2. Allergic rhinitis: allergic rhinitis is also called allergic rhinitis, generally due to contact with allergens continue to stimulate the nasal mucosa, resulting in edema, swelling and other conditions caused by the nose, may also be accompanied by sneezing, nasal itching and other symptoms. 3. Nasal polyps: Nasal polyps may be related to genetic factors, allergic reactions, infections and other reasons, polyps are small or single, most of the symptoms are not obvious, when the polyp volume is relatively large, or multiple, will lead to the emergence of the symptoms of the nose, when the condition is serious, there may also be snoring, nasal sound and other symptoms. Nasal dyspnea can also be caused by other reasons, such as nasal tumors, nasal septum deviation, etc. It is recommended to consult a doctor in time to clarify the cause of the disease and then treat it.