If a patient has a definite plateau reaction, oxygen is usually a useful and effective treatment. Plateau reaction refers to the significant decrease in arterial oxygen saturation and low partial pressure of oxygen while still rapidly entering a plateau above 3000 meters above sea level, which causes clinical symptoms such as dizziness, headache, insomnia, loss of appetite, sleepiness, weakness of breathing, chest tightness and shortness of breath. First, the patient should be allowed to come to a cool, dry and ventilated environment for treatment. Second, the patient should be given oxygen in a timely manner, either through bottlenose oxygen, or by means of oxygen bags or oxygen cylinders at a continuous low flow rate, so as to increase the arterial oxygen saturation and raise the partial pressure of oxygen. In patients with severe respiratory distress, the flow rate and concentration of oxygen can be adjusted to provide continuous oxygenation, which can protect the brain tissue. The increased aerobic metabolism of brain tissue inhibits red blood cell production and often rapidly relieves hypoxia and hypoxia in the body.