If the patient descends slowly from the plateau to the plains, there is usually no significant altitude reaction. However, if the descent speed is too fast or the descent amplitude is too violent, some secondary plateau reaction may occur, and the patient may have nausea, vomiting, dizziness, or respiratory difficulties, gasping and so on. If the symptoms are mild, they can be left untreated and will disappear after 1-2 weeks of acclimatization. However, if the patient has serious symptoms such as wheezing and dyspnea, the patient must go to the hospital for symptomatic treatment, and can be treated with intermittent oxygen therapy or continuous low-flow oxygen therapy. In addition, according to the situation, such as increased intracranial pressure can be applied to mannitol dehydration to reduce intracranial pressure, or you can take medication to alleviate insomnia and other effects, are able to varying degrees of relief of plateau reaction.