In general, the normal value of blood oxygen saturation is 96%-98%, although the blood oxygen 93% is below the normal range is large, but there is no particular danger. In daily life, if the oxygen is sucked from the air, people without underlying diseases usually have blood oxygen at 96% or more. However, for some patients of advanced age or with underlying diseases, the blood oxygen saturation usually does not reach the normal range. Blood oxygen 93% can meet the demand for oxygen supply for all vital organs of the body and therefore does not pose a particular risk to the body. Patients with 93% oxygen can also be treated with oxygen therapy at home, usually with low-flow oxygen for more than 12 hours a day, which is particularly beneficial for all vital organs of the body.