Why do i have multiple cold sores at once?

? Reasons?: Dry lips? Sun exposure? Illness? Stress? Not enough sleep? >> to prevent cold sores from occurring wash hands often. Maintain a healthful lifestyle (regular exercise, nutritious diet, adequate sleep, keeping stress at bay). Keep lips well moisturized & apply sun screen to the areas that your cold sores normally pop up. Talk with your physician about supplementing with lysine.