I noticed this morning a small white crack on the corner of my sons mouth. It doesn’t seem to bother him but it sure is bothering me. Could this be a cold sore? My husband and I have never had one so I’m not even sure if this is what it looks like. He’s not in day care and is only baby sat by my mom. Neither of my family or my husbands have them either. He is teething and drooling a ton. Could this have anything to do with it? He does want to chew on everything and is eating baby food, could it be a cut from a side of a spoon? Should I take him in and get it checked? Please help.