What is the difference between a sign and a symptom?

The distinction between a sign and a symptom is foundational in medical terminology. A sign is an objective finding that can be observed, measured, or quantified by someone other than the patient, such as a healthcare provider. This includes things like fever, rash, or elevated blood pressure, which can be seen or tested during a clinical examination.

On the other hand, a symptom is a subjective experience reported by the patient. Symptoms encompass feelings that are not directly observable or measurable, such as pain, fatigue, or anxiety. These experiences are based on the individual's perceptions and cannot be confirmed through any diagnostic test.

This understanding is crucial for effective communication in healthcare, as it helps guide diagnosis and treatment by differentiating observable facts from personal experiences.