What are the signs of dehydration?

The signs of dehydration are typically characterized by symptoms that indicate the body is not receiving enough fluids. Thirst is often one of the first and most prominent indicators, as it signals the body's need for hydration. A dry mouth is another direct consequence of insufficient fluid intake, as saliva production decreases when hydration levels drop. Fatigue occurs due to reduced blood volume and lower energy levels when the body lacks adequate water. Decreased urine output is a critical sign, as the kidneys conserve water in response to dehydration by producing less urine, which can often appear darker in color. These symptoms combined present a clear picture of dehydration and highlight the body's immediate responses to its fluid imbalance.