Plateau pulmonary edema is defined as a recent arrival at plateau with dyspnea at rest, chest tightness, chest pressure, coughing, and coughing up white or pink frothy sputum. The patient feels general weakness or reduced mobility. Plateau generally refers to plateaus with an altitude of 3000 meters or more, although plateau pulmonary edema can also occur at altitudes below 3000 meters. Plateau pulmonary edema can be triggered by the following factors: First, entering a plateau for the first time, or returning to a plateau after living in a plain for a period of time, or going from a plateau to another plateau. Second, the altitude of the onset area. Third, the time experienced from entering the plateau onset. IV. Individual factors. Climbing speed is too rapid, physical activity, cold or climate change, hunger, fatigue, insomnia, motion sickness, emotional stress, upper respiratory tract infection and other factors. The first time to enter or return to the plateau are within 3 days of onset, symptoms include headache, dyspnea, can not lie down, cough white or pink foamy sputum. On examination, cyanosis, ashen face, large and medium-sized wet rales and sputum sounds in the lungs are seen.