Here are some factors that may awaken cold sores:
Too Much Sunlight or Heat
Weak Immune System
Here are a few Natural Remedies that are a tremendous help:
Lysine: An effective virus blocker. There are salves. (Your local Whole food store probably has it.) The salve is very effective.
Food with Lysine: turkey, ricotta cheese, avocado, eggs, and chocolate.
Yogurt is a bacterial fighter. The acidophilus bacteria found in some brands of yogurt helps counter cold sores. If cold sores are chronic eat 2-3 cups a day. If you are lactose intolerant, there are dairy free brands. Such as soy, coconut, etc...
Ice: At the first sign of a cold sore, use Ice on the area for as long as it is comfortable, take a break, and then reapply. Viruses don't work well in cold environments.
Arginine (A non-essential amino acid- This means that the body doesn't have to get it through food sources, we can make our own)...Foods with arginine, you must stir clear of; especially during outbreaks... Some foods are
Nuts (cashews, almonds, peanuts, walnuts), seeds (sunflower and sesame), milk and cheeses.