Understanding Low Blood Oxygen: What Does an Oxymeter Reading of 74% Mean?

A pulse oximeter reading of 74% is dangerously low (normal: 95–100%) and requires immediate medical attention. It indicates insufficient oxygen delivery to tissues.

Possible Causes

• Lung diseases (pneumonia, asthma, COPD)
• Heart disease (heart failure, congenital defects)
• Anemia
• Smoking
• Certain medications (opioids, anesthesia)
• High altitude

Symptoms of Low Oxygen

• Shortness of breath
• Chest pain
• Confusion
• Lethargy
• Rapid heart rate
• Bluish skin or lips (cyanosis)

If experiencing these, see a doctor immediately. Treatment depends on cause: supplemental oxygen, medications, or surgery.