I don't think it's a cold sore, I have never had one before. It is itchy, painful and a bit crusty now and just under/on my lower lip edge. I have used some hydrocortisone but it has not really helped. I've had it for a couple of days now.
And, my DD (5) has had a red, crusty bit at the side of her lip for weeks now that doesn't seem to be improving much either.
Honestly, I don't think either are cold sores though! Any advice on how to get rid of these buggers very welcome.