A blood oxygen level below 95% is generally considered low and may indicate hypoxemia, a condition where not enough oxygen reaches the body's tissues
. Oxygen saturation readings under 92% warrant contacting a healthcare provider, as this suggests insufficient oxygen supply
. Levels below 90% are considered very concerning and represent a medical emergency requiring immediate attention
. More severe hypoxemia occurs at oxygen saturation below 85%, which can affect brain function and cause symptoms like vision changes and loss of consciousness
. Levels below 80% indicate severe hypoxemia, potentially harming vital organs such as the brain and liver
. Cyanosis, a bluish discoloration of the skin and mucous membranes, typically develops when oxygen saturation falls below 67%
. In summary:
- Normal oxygen saturation: 95% to 100%
- Low oxygen saturation: below 95%
- Concerning hypoxemia: below 92%
- Medical emergency: below 90%
- Very low oxygen: below 85%
- Severe hypoxemia: below 80%
- Cyanosis: below 67%
If oxygen levels drop below 90%, immediate medical care is essential to prevent serious complications
. Symptoms of low oxygen include shortness of breath, confusion, rapid heartbeat, headache, and bluish skin or lips
