A

David

Darling

cold sore

A cold sore is a vesicular skin lesion or the lips or nose caused by the Herpes simplex virus. Cold sores are often associated with periods of general ill-health or infections such as the common cold or pneumonia. The virus, which is often picked up in early life, persists in the skin between attacks. Recurrences may be reduced by special antivirus drugs, applied during an attack.