What is a common sign of hypernatremia?

The correct answer, indicating that thirst and dry mouth are common signs of hypernatremia, is grounded in the physiological response to elevated sodium levels in the body. Hypernatremia occurs when there is an excess of sodium in the blood relative to water, which often leads to cellular dehydration. In response to this condition, the body's natural mechanisms trigger increased thirst as a way to promote fluid intake and dilute the elevated sodium levels. As a result, individuals experiencing hypernatremia commonly report severe thirst and dry mouth as they seek to restore proper hydration. This symptom serves as a critical warning sign, highlighting the need for immediate attention to fluid balance and electrolyte management.