Oxygen intoxication occurs mostly in people who have been adapted to a low-oxygen environment for a long time. When moving to an oxygen-rich environment, the organism will produce a series of uncomfortable symptoms. The symptoms include persistent dizziness, fatigue, drowsiness, insomnia and dreaminess, as well as chest tightness, panic, loss of appetite, constipation, increased frequency of bowel movements and even diarrhea, indigestion, edema of the limbs, and memory loss. Some people who live in an oxygen-rich environment for 1-2 years may also experience reduced hemoglobin content, slowed heart rate, increased cardiac blood output and blood volume, and reversed pulmonary hypertension, which can have adverse effects on the body. Oxygen intoxication is a normal physiological reaction of the human body, the severity of which is related to the time the population lives in the plateau, as well as the altitude they are at, and most of them will gradually relieve themselves within 1-2 weeks. The main reason is that in the plateau environment, the hemoglobin in the human body will compensate for the increase, and after reaching the plain area, the high concentration of hemoglobin is still running oxygen at high load, while the body’s demand for oxygen will be greatly reduced at this time, thus causing excess oxygen in the body and oxygen intoxication reaction. When going down from the plateau to the plain process, you can take the precautionary measures of gradually moving down, taking a proper rest for a period of time in the middle, and then slowly returning to the plain area. When the patient has symptoms of oxygen intoxication, pay attention to rest, drink more water and eat more vegetables and fruits rich in vitamin C. If there is no significant improvement after adjustment, a visit to the hospital is required.