I know this is not BU question, but I’m desperate! I’ve been trying my doctors all morning, but engaged. Probably hectic as so near Christmas 
My 4 year old boy was sick on Sunday, then 12 hours later, then 48 hours later and again last night. No other symptoms, and very hungry between it all. No diarrhoea, no temperature, no one else has it in family.
What could it be? Has anyone encountered a bug like this?
I’ll keep trying the doctors, but just wanted to see if anyone had been through similar.