As the altitude hypoxic hypoxia-induced human diseases, known as altitude sickness. Climb speed and labor intensity are proportional to the occurrence and extent of altitude sickness.

Acute mountain sickness is divided into two altitude sickness, acute high altitude pulmonary edema, acute high altitude cerebral edema three types exist after the merger. Acute mountain sickness altitude sickness manifested as headache, dizziness, loss of appetite, palpitations, palpitation, shortness of breath, malaise, nausea, vomiting and other symptoms of hypoxia; acute high altitude pulmonary edema will have a cough, chest tightness, vomiting pink frothy sputum and other clinical manifestations ; acute high altitude cerebral edema showed altered consciousness, demeanor vague symptoms, what is more likely to lead to death.

For people who have not entered the plateau, the acclimatization training by 1-3 months, most people can adapt to the situation there. After a medical examination to allow Tibet tourists with cardiovascular disease, in Tibet a few months before, they should start doing exercise to gradually improve the body's tolerance to hypoxia. But a few days ago in Tibet, you must have a good rest, do not do strenuous exercise.

Due to psychological stress, fatigue, colds, fever, malnutrition, hypothermia, etc. are likely to be a predisposing factor altitude sickness. Thus, after the first day of Tibet, we must fully rest in the hotel stay, not to mention heavy or running while trying to avoid the parlor, banquet and visits to other outdoor activities to minimize the body's oxygen consumption as much as possible let the body in low oxygen conditions.

In addition, the diet should be easily digested foods, such as health visitors no sugar metabolism, carbohydrate-based diet is best to replenish the body's blood sugar ingredients. But do be careful not to overeat, most of the blood to prevent the body's digestive system and other parts are concentrated, so that the blood supply to the heart and brain appears relatively insufficient, or altitude sickness induced cardiovascular and cerebrovascular ischemic events.

Once the road is unwell, the first to break oxygen. Secondly, if the condition did not improve, we must immediately to the nearest large hospital for treatment.