Which of these examples represents a medical sign?

A medical sign is an objective indication of a medical condition that can be observed or measured by a healthcare professional. In this context, a rash is classified as a medical sign because it can be physically seen on the skin and evaluated, such as by a first responder or medical personnel.

Unlike subjective experiences like fatigue, pain, and dizziness—which are sensations reported by the patient and cannot be directly observed—an observable rash can indicate various underlying medical issues and can be documented and assessed during an examination. This ability to be objectively observed makes a rash a clear representation of a medical sign, reinforcing the distinction between signs and symptoms in medical assessments.