Which of the following is NOT a common indicator of dehydration in patients?

Dehydration is characterized by a deficit of body fluids, which can lead to a variety of physiological changes. Common indicators of dehydration typically include symptoms that arise from reduced fluid content in body tissues.

Dry mucous membranes are a classic sign of dehydration because the lack of adequate fluid leads to dryness in areas like the mouth and nose. Decreased urine output also aligns with dehydration, as the body attempts to conserve water in response to fluid loss, resulting in less frequent urination. Lethargy can occur as dehydration affects energy levels and cognitive function; the body becomes less efficient at performing physical activities due to inadequate hydration.

On the other hand, an increased appetite is not a common indicator of dehydration. In fact, when a person is dehydrated, they may experience a decrease in appetite as the body's focus shifts to managing fluid balance rather than processing food. Thus, increased appetite does not fit with the symptoms typically associated with dehydration and is correctly identified as the option that does not belong in the list of common indicators.