Cold
sores
What to do if you have a cold sore
Get early treatment. The earlier you treat a cold sore, the better. In fact, the best time to start treatment is as soon as you feel the telltale tingle. The standard treatment is aciclovir cream, applied five times a day for 5 days. If your cold sore is on the lips, you may have to reapply the cream after eating or drinking. Aciclovir is an antiviral drug that prevents the virus from multiplying and speeds up healing. You can buy it from pharmacies without a prescription. (Another antiviral cream, penciclovir, is available, but requires a doctor’s prescription in the UK, and needs to be applied more frequently than aciclovir.)
Do not expect miracles from the cream. If you start treatment early enough, it will shorten the attack from about 8 days to about 6 days (Journal of Family Practice 2004;53:923–4). If you often get recurrences, it makes sense to ensure that you have a supply of antiviral cream in readiness, so that you can start treatment promptly.
Dry the
sore up or keep it moist? This is a dilemma, because a sore that is oozing does not look very nice. Some people like to dry it by dabbing on surgical spirit or witch hazel (from a pharmacy), or even gin or vodka. However, it is possible that cold sores heal better when they are kept moist. Of course, aciclovir cream will keep it moist as well as having a specific antiviral action. Tea tree oil, or oil from a vitamin A or vitamin C capsule, are other methods of keeping it moist and may reduce inflammation slightly.