Dry nose may be caused by atrophic rhinitis, dry rhinitis, acute rhinitis and other diseases. 1. Atrophic rhinitis: it is a slow-onset diffuse and progressive nasal atrophic lesion. The patient’s nasal mucosal glands atrophy, secretion is reduced, long-term open-mouth breathing leads to nasal dryness. 2. Dry rhinitis: it is a kind of chronic rhinitis caused by stimulation of external environmental factors, and the patient will feel dryness in the nasal cavity when breathing, which is the most typical and earliest symptom. 3. Acute rhinitis: it is generally an acute inflammatory disease of the nasal cavity caused by viral infection. At the initial stage of viral infection, it mainly manifests as burning, dryness and soreness in the nasal cavity, and the muscles of the body will also be weak. In addition, too dry weather in the fall and winter, inhaling too much dust, and living in an environment with too high a temperature and other environmental factors may also lead to a dry nose. It is recommended that patients consult a doctor in time to identify the cause of the disease, and then carry out targeted treatment, so as not to delay the condition.