Both myself and my DH are constantly plagued with cold sores. I know there are a lot worse things to have but it is really starting to get me down. I'm lucky in that they never spread and are contained to my top lip. But it means I can't kiss my lovely 2 year old or DH. Then by the time mine has gone (roughly 10 days) 9 times of 10 my DH gets one! It is a viscous cycle. I felt the familiar tingling yesterday and low and behold another cold sore. Is there anything I can do/take to prevent these?