Have you noticed any of the following
Behavioural changes – very cross and irritable or particularly clingy or very sensitive?
Picking or rubbing their nose a lot?
Change in appetite – always hungry?
Grinding teeth at night?
Crys out at night?
Pain around the naval area?
Itchy bum?
Consider checking for worms at night. I wrote about this a while back but as it is something that is so prevalent in schools and payschools I thought it was worth reminding people about it again. Check over a few nights before bedtime.
Berry