An oxygen saturation of 93% suggests mild hypoxia. Oxygen saturation is the volume of oxygenated hemoglobin in the blood that is bound to oxygen molecules, as a percentage of the total volume of bindable hemoglobin, which is also known as the concentration of oxygen in human blood. Arterial oxygen saturation is typically 95% to 100% and venous oxygen saturation is typically around 75%. In mild hypoxia, oxygen saturation is usually between 90% and 94%, and individual patients may experience symptoms such as dizziness and fatigue. The causes of decreased oxygen saturation are mainly disease states, such as ventilation dysfunction, diffusion dysfunction, and disproportionate ventilation and blood flow. It is recommended that when the body shows uncomfortable symptoms, it should go to the relevant hospital in time and be treated under the guidance of professional doctors.