Altitude sickness is a pathological reaction after human body is exposed to low pressure and hypoxia, and it is a common disease peculiar to plateau areas. Common symptoms include headache, insomnia, loss of appetite, fatigue and dyspnea. Headache is the most common symptom, which is often forehead and temple pain, and the pain is aggravated when getting up at night or in the morning. Increasing lung ventilation, such as mouth breathing and mild activity, can relieve headaches.

Specific symptoms of altitude sickness:

① Symptoms such as headache, dizziness, nausea and vomiting, palpitation and shortness of breath, chest tightness and chest pain, insomnia, lethargy, anorexia, abdominal distension, numbness of hands and feet. After examination, it cannot be explained by other reasons. The evaluation of symptoms mainly depends on the degree of headache and/or vomiting (mild, moderate and severe), combined with other symptoms.

② Only mild symptoms such as palpitation, shortness of breath, chest tightness and chest pain. It is manifested during rest, but the symptoms are especially obvious after exercise.

③ Those with the following signs, such as obviously increased pulse, slight or moderate increase (also low) of blood pressure, cyanosis of lips and/or fingers, edema of eyelids or face, etc.

Cough is not a symptom of altitude sickness.