Oxygen therapy is the process of oxygenating the patient’s blood through an oxygen concentrator and then returning it to the patient’s body. Blood oxygen therapy has many benefits for the human body. After blood therapy, the patient can increase the oxygen content in a short period of time, so that the patient’s blood is in a high-energy state, and can also enter the capillaries and the body through the lungs, which has a certain effect on the metabolism of the human body. It must be noted that the higher the oxygen concentration is, the better it is. The higher the oxygen concentration is, the more it will lead to cellular aging, and oxygen therapy should not be carried out blindly. Blood oxygen therapy can also improve the oxygen saturation, blood oxygen saturation can not be lower than 94%, if lower than 94% indicates the symptoms of hypoxia, but also lead to liver and kidney function impairment problems, do blood oxygen can prevent liver and kidney function impairment problems.