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10 Causes and Treatments for Cold Sores

Treatment: Stay Healthy

Though you can't prevent yourself from ever having active cold sores pop up, you can do your best to keep your body in tip-top shape.

Getting plenty of exercise is an important step in keeping your immune system up and running, which in turn can reduce the frequency of cold sore outbreaks.

Also, make sure you get plenty of sleep. Rest is just as necessary as exercise, so keep those all-nighters to a minimum [source: McKinley].