Natural Health: What can I do about getting a cold sore every summer? 

Megan Sheppard: "When there is potential for a viral outbreak or flare-up, it is crucial to supplement with vitamin C."

I get a cold sore nearly every year when I go on a sun holiday. The intense heat seems to trigger it. I’m also a nervous traveller, which probably doesn’t help. Is there anything I can do to head it off at the pass?

Sunlight and stress are the top two triggers for cold sores. Being a nervous traveller will undoubtedly raise your stress levels, and when combined with sunshine, it’s more likely the virus will reactivate.