I took my son to nursery today and as I was saying bye I mentioned in passing that he'd got peanut butter in his hair this morning. The teacher seemed worried and asked if it was still in there. I said no, maybe there's a tiny bit. I'd got it all off but hadn't washed his hair. She said it's probably fine it's just she had a nut allergy. As I was walking back though, I thought maybe it's irresponsible to give him peanut butter in the morning? He has it every morning really and now I'm worried he could make someone ill. How much should I worry about it? I have no idea how much allergen is on him. And even on a bus or in a shop or something it could hurt someone maybe. I guess it's more concerning for a toddler because they are such messy eaters, it could be anywhere on him really.