McKesson Clinical Reference Systems: Women's Health Advisor 2002.2

Hyperventilation Syndrome

What is hyperventilation syndrome?

Hyperventilation syndrome is a condition brought on by rapid, shallow breathing. It can cause fainting. Hyperventilation can be very alarming because it can appear to be a different, more serious problem.

How does it occur?

The rapid, shallow breathing of hyperventilation most often occurs when you are anxious or emotionally upset. You are rarely even aware that you are breathing rapidly.

When you breathe rapidly, you exhale a lot more carbon dioxide than normal. This loss of too much carbon dioxide affects your nervous system, including your brain, and causes the symptoms of hyperventilation.

What are the symptoms?

The symptoms of hyperventilation usually progress as follows:

  • shortness of breath or an inability to take a deep breath
  • numbness and tingling of the skin (in the hands or around the mouth)
  • lightheadedness
  • spasms of hands and feet, occasionally
  • fainting.

How is it diagnosed?

The diagnosis of hyperventilation depends on several factors, including how well your health care provider knows you, your age, and especially your overall medical condition.

Your medical history is important. Your health care provider will probably ask:

  • How long have you had the symptoms? How frequently have they occurred in the past?
  • Did you have any other symptoms just before you hyperventilated, such as a cough (especially coughing up blood)?
  • Do you have any other medical problems?
  • Are you taking any medications?
  • What events occurred at the time you hyperventilated? Were these events emotionally upsetting?

Your health care provider may do tests to check the level of oxygen in your blood. Usually this is done by placing a pulse oximeter on your ear or finger. Sometimes a sample of blood is tested for levels of oxygen and carbon dioxide.

Your health care provider may ask for a chest x-ray to make sure that you do not have any other chest or lung problems.

How is it treated?

The treatment for hyperventilation is simple. All you need to do is rebreathe carbon dioxide to get your body's oxygen/carbon dioxide balance back to normal. You can do this by closing your mouth and breathing slowly through your nose. Or for faster results, hold a paper bag tightly around your mouth and breathe in and out several times into the bag.

How can hyperventilation be prevented?

If you tend to hyperventilate, make sure you know the symptoms. If you can recognize the symptoms early, you can relax and slow down your breathing before you hyperventilate.

If you are hyperventilating more often, it is getting worse, and you have no other physical medical problems that could be causing it, seeing a counselor might help. A counselor can help you identify and treat the emotional problem that might be causing you to hyperventilate.


Developed by McKesson Clinical Reference Systems.
Published by McKesson Clinical Reference Systems.

This content is reviewed periodically and is subject to change as new health information becomes available. The information is intended to inform and educate and is not a replacement for medical evaluation, advice, diagnosis or treatment by a healthcare professional.

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