It is not recommended to go to Lhasa during a cold. Colds are mostly viral infections of the upper respiratory tract, including the nose, throat and pharynx, which may produce inflammation, and may also lead to inflammatory conditions in the trachea and lungs. The human body’s resistance is relatively weak, and the oxygen content is particularly low in the plateau zone, so colds are particularly easy to convert into other plateau diseases. It is easy to lead to the occurrence of bronchitis, pulmonary edema or pneumonia, especially prone to the occurrence of pulmonary edema, which is a particularly high risk plateau disease, if not actively treated, and may lead to the phenomenon of death, is very bad. Secondly, the oxygen content in Lhasa is relatively low, the phenomenon of cold, even if there is no pneumonia, pulmonary edema or other conditions, the cold is not very easy to recover, it may take a long time to recover from the cold, dizziness, headache will be more serious, the cold period is absolutely not allowed to go to Lhasa.