Toothpaste On Cold Sore: Does It Work?

Only anecdotal evidence supports the idea that toothpaste is effective as a cold sore preventative. Though some people claim that toothpaste prevents their cold sores from appearing, researchers haven't carried out studies to investigate the facts. What's more, according to the "How to Get Rid of a Cold Sore" blog, some doctors believe that the ingredient sodium lauryl sulphate (SLS) in toothpaste can actually cause cold sore attacks.

If you'd like to try using toothpaste to prevent cold sores, apply a thin smear of a white, non-gel toothpaste to the place where you feel the itching or tingling that precedes a cold sore. Apply the paste before going to sleep at night and every hour or couple of hours during the day. To remove the toothpaste, wipe it with a soft face towel soaked in warm water. You can also use toothpaste in the same way to help dry out blisters if the cold sore appears, and let your skin return to normal quickly.

According to the University of Michigan, sunlight is a trigger for cold sores, so covering the skin around the lips with sunblock every day reduces the risk of an outbreak. In addition, stress, fatigue, and even an upset stomach may trigger a cold sore. Unfortunately, no natural remedies have been proven to be effective in the treatment or prevention of cold sores, but taking care of yourself and paying attention to what triggers your cold sores may help you stay one step ahead. 

Prevention is better than a cure, and cold sores are usually a sign of stress or poor oral health. Smearing toothpaste on the itchy or tingly patch won't do any harm, and it may prevent the cold sore from making an appearance.