Which of these is NOT a symptom of heat exhaustion?

Heat exhaustion is a condition that occurs when the body loses an excessive amount of water and salt, primarily through sweating, which can happen during hot weather or intense physical activity. The symptoms of heat exhaustion generally include dizziness, rapid heartbeat, and fatigue, all of which are signs of the body's struggle to maintain normal functioning under heat stress.

The symptom of relaxation of muscles is not typically associated with heat exhaustion. While heat-related illnesses can lead to muscle cramps or spasms due to electrolyte imbalances, a general feeling of muscle relaxation is not a recognized symptom of heat exhaustion. Instead, the body's response to excessive heat is more likely to exhibit increased stress and discomfort, leading to symptoms like muscle tightness rather than relaxation.

In summary, understanding the symptoms of heat exhaustion can help in identifying when someone is experiencing overheating, ensuring timely intervention to prevent further complications.