What might be a symptom of hyperthermia?

Hyperthermia refers to an abnormally high body temperature, often due to excessive heat exposure or exercise, which can overwhelm the body's thermoregulation. A key symptom of hyperthermia is an elevated heart rate. As the body struggles to cool itself, the heart pumps faster to facilitate blood circulation to the skin, where heat can be dissipated.

Fever, which can also be associated with hyperthermia in certain contexts, represents a response to infection or illness where the body's temperature rises as part of the immune response. However, in the direct context of hyperthermia, it is more accurate to focus on the body's inability to regulate temperature effectively rather than a controlled increase as seen in fever.

Feeling cold is not a symptom associated with hyperthermia; rather, it suggests a lower body temperature or other conditions. Therefore, elevated heart rate stands out as a significant indicator of hyperthermia.