Low blood pressure, or hypotension, can cause symptoms like dizziness, fatigue, and fainting due to reduced blood flow.

A blood oxygen level indicates how well the body distributes oxygen from the lungs to all of its cells. What does it mean to have low blood oxygen?

If you have a health condition, your blood oxygen level may fall outside of the normal range. Learn what abnormal blood oxygen levels mean.

It also describes the causes, symptoms, and diagnosis of obstructive sleep apnea and explores other possible causes of low blood oxygen levels during sleep.

Low blood oxygen levels from iron deficiency anemia may lead to heart palpitations, tachycardia (a fast heart rhythm), and chest pain.

Low blood pressure (hypotension) can affect your blood flow and oxygen levels and can signal the presence of an underlying health condition.

Blood oxygen levels help indicate lung health, as well as other conditions that happen in the body. Learn more about normal blood oxygen levels here.

Vitamin B12 deficiency can cause a number of strange sensations, like numbness, tingling, and more. “It felt like electricity ...

Hypoxemia (low oxygen in your blood) can cause hypoxia (low oxygen in your tissues) when your blood doesn't carry enough oxygen to your tissues to meet your body's needs.

Continually low blood pressure or a sudden drop in blood pressure can lead to worrisome symptoms and even serious health problems.

This happens when your blood pressure levels falls below the normal range, which is below 90/60 mm Hg. Read on to know some of the signs of low blood pressure levels that you should know.