My Ds (3.9yrs) first got a cold sore about a year ago on his cheek which the GP said was quite a common place to get one. Since then he's had about 4 or 5 on his lip (not all at once but throughout the year). He's got another now and I'm wondering if anyone knows what could cause so many coldsores in a young child. He's otherwise very healthy but does not have a fantastic diet. He eats fruit but no veg.... But I do give him vitamins...
Any advise???