Symptoms of severe plateau reaction include dyspnea, palpitations, memory loss, etc. Fainting and coma may also occur. People arrive at an altitude of more than 3,000 meters above sea level, because the height is too high, the environment of low pressure, low oxygen caused by the body’s acute blood oxygen drop will appear plateau reaction. Decrease in blood oxygen will appear breathlessness, dizziness, nausea and other symptoms, serious cases will also appear breathing difficulties, palpitations, memory loss, fainting and so on. Before going to the plateau area, you can choose to go to the hospital for plateau reaction related tests to determine the probability of plateau reaction. If the probability is very high, take rhodiola rosea, aminophylline and other drugs under the guidance of the doctor to prevent it. Once the plateau reaction occurs, it is necessary to inhale oxygen in time to treat it, and to consult a doctor in time when there is a serious situation such as pulmonary edema, to prevent a bad prognosis.