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

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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.

Other common triggers for the reactivation of cold sores include fatigue, fever, and menstruation. The herpes simplex virus (HSV-1) is responsible for cold sores and is thought to be carried by 80-90% of the population. Fortunately, only 20% will go on to develop sores.

The amino acid lysine generally works well in preventing the herpes virus from flaring up. However, it is…

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