Which of the following is a sign rather than a symptom of a medical emergency?

Pale skin is considered a sign of a medical emergency because it is an observable indicator that can be identified by someone else. In clinical settings, signs are objective findings that can be measured or seen, whereas symptoms are subjective experiences reported by the patient. For instance, when a patient presents with pale skin, it may indicate insufficient blood flow, shock, or other serious conditions requiring immediate attention.

In contrast, dizziness, nausea, and pain are symptoms that depend solely on the patient's personal experience and cannot be objectively quantified by an observer. Therefore, when evaluating medical emergencies, the ability to recognize pale skin as a sign can prompt urgent assessment and interventions to address the underlying issues effectively.