Hi Burnouts,
I always dab tea tree oil on mine and sometimes I take a L Lysine tablet. This stops the cold sore in it's tracks and I normally get real big ones on my lip.
f you pop down to your local pharmacy as they may be able to recommend a vitamin to stop them re-occuring. I remember once I kept suffering with them on and off and a pharmacist gave me some vitamins and I've never had one since.
Im a regular sufferer and find that creams like blistex and zovirax stop working after a while. I always find the best thing to use is TCP. Its stings for a few and is a bit smelly, but it always clears the coldsore up in no time.
An old lady once told me to use a cold used teabag. I laughed about it but decided to try it anyway and guess what, it worked! I asked my GP about it and she said it was the tannin in it so maybe before spending a lot in the chemists you should give it a try. It's worked for me 3 times now. Horrible things coldsores.