I have a cold sore under my lip which just won't go :( I've had it for a week. I get them usually about twice a year and have done for years. Usually stress related or when I've been ill. Just getting over flu and one has landed.... Tried usual Zovirax, lysine (from the herbalist) Carmex etc. it's bright red and horrible. It looks like its healing a bit then at night time it seems to get worse again and sore and cracked etc. any ideas it looks horrible :( and it's sore :(