What is a common symptom of heat cramps?

Muscle cramps of major muscle groups are a hallmark symptom of heat cramps. These cramps are typically characterized by painful, involuntary contractions that occur during or after strenuous physical activity in a hot environment. The major muscle groups often affected include those used most during the activity, such as the calves, thighs, and shoulders.

This symptom is primarily caused by an electrolyte imbalance, particularly due to excessive sweating and insufficient replenishment of fluids and salts, which are crucial for proper muscle function. While other symptoms such as persistent headache, nausea, and dizziness can be associated with heat-related illnesses, they are more indicative of conditions like heat exhaustion or heat stroke. Therefore, recognizing muscle cramps specifically leads to a clear identification of heat cramps and emphasizes the need for immediate attention to hydration and electrolyte replacement to prevent progression to more severe heat illnesses.