What is a common symptom of hypoxia?

Hypoxia refers to a condition in which there is a deficiency of oxygen in the body, particularly in the tissues. One of the most serious symptoms of hypoxia is the loss of consciousness, which can occur as the brain becomes deprived of adequate oxygen supply. The brain is extremely sensitive to oxygen levels; when these levels drop below normal, cognitive function deteriorates rapidly, leading to confusion, lethargy, and in severe cases, a complete loss of consciousness. This symptom is critical for divers to recognize, as it can pose immediate risks during a dive, making effective monitoring of oxygen levels and dive profiles essential.

In contrast, states of increased energy, enhanced coordination, and heightened awareness are not symptoms of hypoxia. In fact, these conditions generally reflect an adequately oxygenated state, while hypoxia tends to lead to decreased performance and cognitive impairment.