Question: What is the Difference Between a Sign & a Symptom?
Answer: A sign is objective evidence of disease; it is something that can be seen.
Example: Cyanosis (bluish discoloration of the skin) is a common sign of Acute Respiratory Distress Syndrome (ARDS).
A symptom is subjective evidence of disease; it is a feeling.
Example: Chest pain is a common symptom of Mesothelioma.
More Lung Diseases Q&A