A high partial pressure of oxygen indicates a high content and concentration of oxygen in the blood. The partial pressure of blood oxygen is the support caused by the physical dissolution of oxygen in the blood. In a normal person at rest, the arterial partial pressure of oxygen is about 100 mmHg and the venous partial pressure of oxygen is about 40 mmHg. The arteriovenous partial pressure of oxygen is generated by the body through the inhalation of oxygen, thus generating the arteriovenous partial pressure of oxygen, which reflects the oxygen uptake capacity of the pulmonary capillaries. High oxygen partial pressure can be seen in hyperventilation, a common cause of hyperventilation, such as strenuous exercise, which results in shortness of breath and inhalation of too much oxygen, and the measured oxygen partial pressure will be high. Environmental factors can also lead to elevated partial pressure of oxygen, such as when coming down from the plateau, the oxygen in the air suddenly increased, the partial pressure of oxygen in the blood will also increase, the phenomenon of oxygen intoxication. When the patient’s body becomes obviously unwell, he should go to the hospital for medical treatment immediately.