A simple goodbye kiss from your favourite auntie can cause cold sore transmission. Could the amino acid l-lysine help? Yes. Here’s how it works.

What are cold sores and how does the HSV1 virus cause them? Can you catch cold sores? Common triggers and best treatments for herpes simplex.

Strange tingly feeling on your lip? It could be the first sign of a cold sore. We look into how long a cold sore lasts and how to best manage them.