In medical terminology, a sign is an objective indication of disease or condition that can be observed or measured by a healthcare provider, as distinguished from symptoms which are subjective experiences reported by patients. Signs include measurable findings like fever (elevated temperature), high blood pressure, skin rashes, swelling, abnormal heart sounds, or laboratory test results. Healthcare providers use signs along with reported symptoms to diagnose conditions and monitor treatment effectiveness. The combination of signs and symptoms forms the clinical picture guiding medical decision-making. Vital signs—temperature, pulse, blood pressure, and respiratory rate—are routinely measured signs providing baseline health information.