Sometimes, usually when I have a particularly nasty cold, I get a spot/crack in the corner of my mouth. I know I'm not the only one but, having looked into causes etc on the Internet, I seem to be the only one with a helpful cure.
I did do research into what causes it and I'm not going to go into that here because, well... I didn't agree. Some people say it's a vitamin disorder, some say its an allergic reaction to some foods or products, some even say it's a form of herpes. I don't think it's any of these... well the one I get isn't. OK so if I eat a whole pineapple I may get one, I'm not denying that acidic foods may be a cause sometimes but mine is about once a year when I'm coldy.
So if this sounds like something that happens to you and you've not found anything that works then - and I know this is going to sound weird - try using
Zinc and Castor Oil cream from
Boots (or in fact I've just found it cheaply
here - although I haven't tried this particular one). It's in the nappy rash section and no using Sudocrem is not going to be the same. This stuff really works if you apply it whenever you remember, for a couple of days.