Which symptom is indicative of hypoglycemia?

Cool, clammy skin is a classic symptom of hypoglycemia, which is a condition characterized by abnormally low blood glucose levels. When blood sugar drops, the body initiates a series of responses, including the release of adrenaline. This response can lead to physiological changes such as increased perspiration, resulting in skin that feels cool and clammy to the touch.

In contrast, the other symptoms and signs mentioned do not align with hypoglycemia. Increased thirst is more often associated with hyperglycemia or diabetes mellitus, where elevated blood sugar leads to dehydration. Warm and dry skin suggests a different set of issues, such as hyperthermia or dehydration, rather than hypoglycemia. Similarly, a high energy level typically reflects stable blood sugar and is not indicative of a hypoglycemic event, where individuals often experience weakness or fatigue due to the lack of glucose available for energy. Therefore, the correct association for hypoglycemia would be cool, clammy skin.