The air is thinner, the air pressure is lower, and the oxygen content is particularly low. In the first case, if the patient is suffering from chronic simple rhinitis, the symptoms are not very heavy, and the symptoms can be significantly improved after the clinical application of nasal spray hormone treatment, and there is no obvious impact on nasal ventilation after the improvement, it is possible to go to the plateau. Secondly, if the patient is allergic rhinitis or chronic hypertrophic rhinitis, there is a risk of acute attack of allergic rhinitis after going to the plateau, resulting in poor nasal ventilation and the risk of breath-holding, hypoxia and hypoxemia. Therefore, patients with allergic rhinitis and chronic hypertrophic rhinitis should try to go to the plateau as little as possible.