A dry nose and poor ventilation can be caused by allergic rhinitis, dry rhinitis, or be one of the symptoms of a cold, with different causes and different treatments. Relieve the symptoms through physical therapy, medication, and lifestyle improvement. 1. If allergic rhinitis is caused by contact with mites, pollen and other allergens, which manifests as a dry nose, it is recommended to stay away from allergens, wash the nasal cavity with saline, and also use glucocorticosteroids such as budesonide to reduce mucosal inflammation. 2. If long-term dust stimulation, air dryness and heat lead to dryness in the nose, reduced nasal secretion, dryness, poor ventilation, sneezing and other manifestations, it is recommended to increase the humidity of the room, saline drops to alleviate the symptoms, and avoid picking the nose in daily life to increase the risk of rhinitis. 3. If it is clearly diagnosed that the nasal congestion is caused by cold and flu, accompanied by fever, cough and other symptoms, it is recommended to apply hot compresses to alleviate the symptoms of nasal congestion, eat a light diet, drink more hot water and so on. If there is a bacterial infection, you can take oral cephalosporin antibiotics or amoxicillin capsules and other anti-infective treatment. Nose dryness and ventilation is not smooth, it is recommended to go to the hospital for examination, clear diagnosis and follow the doctor’s instructions to standardize the use of medication and treatment.