1 doctor weighed in:
What does it mean if you have low oxygen levels in your blood tests?
1 doctor weighed in

Dr. Barbara Stark Baxter
Internal Medicine - Allergy & Immunology
In brief: Lung disease
Is the commonest reason for a low level of oxygen in the blood.
It can also happen in heart disease if the heart is failing and fluid builds up in otherwise-healthy lungs, or if there is a hole in the heart, causing blood to bypass the right heart circulation into the lungs and skip picking up oxygen there. These are examples of some common causes. Smoking, high altitude=examples of lung reasons.

In brief: Lung disease
Is the commonest reason for a low level of oxygen in the blood.
It can also happen in heart disease if the heart is failing and fluid builds up in otherwise-healthy lungs, or if there is a hole in the heart, causing blood to bypass the right heart circulation into the lungs and skip picking up oxygen there. These are examples of some common causes. Smoking, high altitude=examples of lung reasons.
Dr. Barbara Stark Baxter
Dr. Barbara Stark Baxter
Thank
Get help from a real doctor now
Dr. Aaron Milstone
Board Certified, Internal Medicine - Pulmonology
23 years in practice
1M people helped
Continue
107,000 doctors available
Read more answers from doctors