Which of the following is NOT typically a sign of dehydration?

Frequent urination is generally not a sign of dehydration; in fact, it is often associated with proper hydration or other conditions, such as diabetes. When the body is dehydrated, one of its responses is to conserve water, leading to less frequent urination and darker urine.

Increased thirst is a common physiological response to dehydration as the body signals the need for fluid intake. Dry mouth occurs when there is insufficient saliva due to lack of hydration, which is indicative of a dehydrated state. Dizziness can occur because dehydration can lead to a decrease in blood volume and blood pressure, which can affect circulation, especially when standing up. Therefore, while the other options are clear indicators of dehydration, frequent urination tends to suggest that the body is adequately hydrated or responding to other factors.