If the blood oxygen saturation is around 80%, this is not normal. A normal blood pressure saturation is not less than 96% in a healthy person. At around 80%, it is still considered chronic hypoxia. Chronic hypoxia is usually seen in patients with chronic obstructive pulmonary disease or pulmonary heart disease or emphysema. 90%-96% is considered mild hypoxia, 80%-90% is moderate hypoxia, and below 80% is severe hypoxia. Oxygen saturation of more than 80% is moderate hypoxia, which must be treated actively for the original disease. If there is lung infection, it is recommended to actively treat anti-infection, and for patients with chronic obstructive pulmonary disease, it is necessary to give appropriate antispasmodic and asthma relief, do nebulization and sputum removal, give sputum removal drugs, and give hormone and methylprednisolone intravenous treatment if necessary. In patients with pulmonary heart disease, we should improve cardiac function, give diuretic, anti-infection and vasodilator. If you have hypertension and hyperglycemia, you must control hypertension and adjust blood sugar. If the oxygen saturation is more than 80%, you can give respiratory stimulants, like Niclosamide, which can be slowly administered by IV to improve the respiratory nerve center and improve the oxygen saturation by adjusting the respiratory frequency and depth. These are the main aspects.