Swelling in the face on the plateau, mainly due to plateau reaction, caused by hypoxia. Hypoxia will occur in the local metabolic sterile products more, further development of inflammatory reaction, capillaries in the inflammatory stimulation will cause increased permeability, edema or redness and other reactions. It is recommended that patients wear an oxygen concentrator when they are on the plateau, inhale some oxygen at regular intervals, and if the condition is serious, they may have to go to the hospital, and have the hospital checkups and other aspects of the treatment. Plateau reaction must be taken seriously, if discomfort, pulmonary edema or lung infection, etc., the serious case will be fatal. Patients must fully assess their own physical state and anticipate altitude sickness, then choose interventions to prevent its occurrence and travel to the plateau area under appropriate circumstances.