When a stressful situation is encountered in flight, an abnormal increase in the volume of air breathed in and out can cause a condition known as

Hyperventilation is the condition of excessive breathing rate and depth, leading to reduced carbon dioxide levels in blood. This causes tingling, dizziness, and potential fainting. Hypoxia (A) is insufficient oxygen, aerosinusitis (B) is sinus inflammation, and aerotitis (D) is ear inflammation - all different conditions.