5. Confusion, Dizziness, or Headaches
Brain is highly sensitive to oxygen changes
Confusion, memory lapses, or poor concentration
Morning headaches are common in people with sleep apnea
In severe cases: Loss of consciousness or seizures
6. Cyanosis – Blue or Gray Tint to Skin
Lips, fingertips, or nail beds turn bluish-gray
Sign of severely low oxygen — tissues aren’t getting enough O₂
A medical emergency — especially if sudden.
7. Wheezing or Gasping
Noisy breathing due to narrowed airways
Common in asthma, bronchitis, or allergic reactions
Gasping indicates severe distress
If someone is gasping or struggling to speak in full sentences — call emergency services.
8. Restlessness or Anxiety
Body senses oxygen shortage → triggers stress response
8. Restlessness or Anxiety
Body senses oxygen shortage → triggers stress response
Feels like panic or unease, even without cause
Often worse at night
Sometimes mistaken for anxiety disorder — but could be respiratory.
What Causes Low Oxygen Levels?
Chronic Lung Diseases
(COPD, emphysema)
Damaged lungs can’t absorb oxygen well
Asthma Attack
Airways constrict, limiting airflow
Pneumonia or Lung Infection
Fluid fills air sacs, blocking oxygen exchange
Pulmonary Embolism
Blood clot blocks lung artery
Heart Failure
Heart can’t pump oxygenated blood effectively
Sleep Apnea
Breathing pauses during sleep → repeated oxygen drops
High Altitude
Less oxygen in the air — especially above 8,000 ft
Anemia
Fewer red blood cells to carry oxygen
Some people with long-term conditions adapt to lower levels — but still need monitoring.
How to Check Your Oxygen Level
