Hyperventilation is rapid or deep breathing, usually caused by anxiety or panic. This overbreathing, as it is sometimes called, may actually leave you feeling breathless.

What causes a person to hyperventilate?

Some causes of sudden hyperventilation include anxiety, fever, some medicines, intense exercise, and emotional stress. Hyperventilation also can occur because of problems caused by asthma or emphysema or after a head injury.

Is hyperventilation an emergency?

If hyperventilation is severe or if it is the first time a person experiences it, it is best to seek emergency medical attention. If the following symptoms accompany hyperventilation, seek urgent care: chest pain. confusion.