Using chemicals on your cold sore blisters is not the way to treat your body. There are so many different natural solutions to cold sores there is no reason to ever reach for a drug. Everything you put on your blisters gets absorbed into the body. Then, the liver has to detox those drugs out of your body. Anything that is synthetic is not natural to the body and the body must get rid of it. Natural remedies actually work with your body naturally to help kill the herpes simplex virus that causes cold sores. By going natural, you are actually working with your body instead of against it. Unnatural remedies only suppress symptoms temporarily. When natural remedies for cold sores actually treat the cause of you continually getting cold sores.