Science glossary film: Symptom

A characteristic indication of a disease or illness felt by someone afflicted by it. Common symptoms of ill health include a sore throat, blurred vision, headaches or nausea. Many symptoms are associated with more than one disease, so doctors must look at all symptoms, and consider genetic and environmental factors, when making a diagnosis.

Common symptoms of ill health include a sore throat, blurred vision, headaches or nausea. Many symptoms are associated with more than one disease, so doctors must look at all symptoms, and consider genetic and environmental factors, when making a diagnosis.