Lightheadedness is a feeling that you are about to faint or "pass out." Although you may feel dizzy, you do not feel as though you or your surroundings are moving. Lightheadedness often goes away or improves when you lie down.

Is lightheadedness and dizziness the same thing?

Dizziness: How it's different from lightheadedness

Although it is often hard to tell the difference, your answer may have a big impact on how the doctor moves forward with diagnosis. Lightheadedness is not the same as dizziness, also known as vertigo, which refers to feeling like your surroundings are spinning.

When should I be concerned about lightheadedness?

Generally, see your doctor if you experience any recurrent, sudden, severe, or prolonged and unexplained dizziness or vertigo. Get emergency medical care if you experience new, severe dizziness or vertigo along with any of the following: Sudden, severe headache.