The treatment of low blood oxygen can be divided into three main parts: symptomatic treatment, etiologic treatment, and general treatment. 1. Symptomatic treatment: mainly for the treatment of low blood oxygen, so symptomatic treatment should be timely, commonly used in the clinic oxygen or ventilator to raise blood oxygen, if the patient is clear, vital signs are relatively stable state, you can use a nasal cannula or mask oxygen; if the patient appears to be in a state of delirium tremens, vital signs are unstable, you need to intubate or even tracheotomy with the use of ventilator. 2. Etiological treatment: In the symptomatic treatment, it is also necessary to actively search for the cause of low blood oxygen, eliminate the cause of the disease so that the disease can be truly controlled, so the etiological treatment is a very critical step. For example, in the case of hypoxemia caused by severe pneumonia, it is necessary to choose antibiotics to control the infection at the same time of symptomatic oxygen therapy. 3. General treatment: For patients with low blood oxygen, the general treatment mainly consists of bed rest, reducing turning over, avoiding emotional excitement, etc., so as to reduce their own consumption of oxygen, which is the basis of treatment. Patients with low blood oxygen are advised to go to the hospital in time and actively cooperate with the doctor for treatment.