What symptom is associated with a person who is at risk of dehydration?

A person at risk of dehydration often exhibits persistent headaches and fatigue as symptoms. This occurs because dehydration leads to insufficient fluid levels in the body, impacting overall physiological functions and energy levels. With limited hydration, the brain can become affected, triggering headaches, and overall fatigue results from the lack of resources needed for the body to function optimally.

Other symptoms could also be present, such as dizziness, dry mouth, or decreased urine output, but the combination of persistent headaches and fatigue is particularly notable. These symptoms serve as critical indicators that prompt further evaluation of hydration status. In contrast, excessive energy and activity, increased appetite, and mild perspiration are not typically associated with dehydration and may indicate the body's normal states or responses to other factors.