Some signs you may have identified... 
Emotional and behaviour signs:  tantrums, defiant, aggressive, sad, unhappy, cries a lot, 
afraid or worried, clingy, avoids social situations, starts behaving in ways that they’ve outgrown 
(sucking their thumb or wetting the bed), has trouble paying attention, agitated.
Physical signs: changes in sleep pattern, difficulty getting out of bed, 
under or overeating, lost or gained a lot of weight, physical pains with no 
clear medical cause (headaches, stomach aches, nausea or other physical pains).
School and social signs: underperforming, having problems
fitting in at school or getting along with other children/staff, not want to go to 
school, not doing what their teacher asks, has withdrawn from their friends, 
doesn’t want to go to social events (birthday parties, clubs etc).