Dry nose is mainly caused by three aspects: 1. external environment induces nasal dryness; 2. patients with dry rhinitis have dry nasal cavity, which are interrelated. If the patient lives in a particularly dry environment, for example, in the north, there is heating at home in winter, and the air outside is very dry, which can easily induce nasal dryness. In the south, for example, in the summer when the wind is very sandy and the temperature is very high, it is also easy to trigger nasal dryness. This is because the nasal water evaporates quickly and the temperature is high, which can easily lead to dehydration of the nasal mucosa, thus forming dry nasal cavity.3. Some patients have their own reasons, rarely eat fruit, work at a fast pace, often stay up late on fire, rest poorly and picky eating leading to dry rhinitis. You can use compound peppermint brain nasal drops for your nose and saline to do nasal rinse treatment to relieve the symptoms of dry nasal cavity. Patients are advised to eat more vegetables and fruits to supplement vitamins, which can promote the regeneration of the nasal mucosa epithelium and promote the secretion of mucosal glands.