Hyperventilation

Abnormally deep or rapid breathing that is usually caused by anxiety. Hyperventilation may also occur as a result of uncontrolled diabetes mellitus, oxygen deficiency, kidney failure, and some lung disorders. Hyperventilation causes an abnormal loss of carbon dioxide from the blood, which can lead to an increase in blood alkalinity. Symptoms include numbness of the extremities, faintness, tetany, and a sensation of not being able to take a full breath. Breathing into a paper bag may help to reduce the symptoms in people with anxiety.