What is NOT a sign of hyperventilation?

Hyperventilation is characterized by breathing that is faster and deeper than normal, which can lead to a decrease in carbon dioxide levels in the blood. This physiological change can result in a variety of symptoms.

Muscle spasms, loss of consciousness, and tingling sensations are all signs that can be associated with hyperventilation. Muscle spasms often occur due to a lack of carbon dioxide, which affects the muscles and leads to cramps or spasms. Loss of consciousness can happen in severe cases, typically as a result of reduced blood flow to the brain caused by significant changes in blood gas levels. Tingling sensations, often referred to as "paresthesia," can occur as a direct result of reduced carbon dioxide, which influences nerve function.

In contrast, increased thirst is not typically a symptom of hyperventilation. It is more associated with dehydration or other conditions that affect fluid balance in the body. Since hyperventilation does not inherently cause a direct physiological response related to thirst, this makes it the best choice for what is NOT a sign of hyperventilation.