Not sure if trolling or serious...but here 
cold sores: plural of cold sore
Noun
An inflamed blister in or near the mouth, caused by infection with the herpes simplex virus.
I had no trouble looking it up as "what are cold sores" |
0.0 every time I looked it up it sends me links about herpies,which wasn't what I was searching for
And yeah I'm serious. I always thought children could get them.