The children's mental health charity counsels 1000 children annually and said if issues are caught early, mental illness can be minimized so a child doesn't have to carry problems with them into adulthood.
CEO of the charity, Ian Soars, told Premier that Christians should be observant to their child's behavioural changes.
He said: "The most common trigger for children being referred to us is something's changed.
"So a very outgoing child had become very withdrawn or introverted. Or a normally quiet child has become very angry or there's a lot of tears. Or if perhaps they're older, there's no money, or there's too much money. There's normally a change in the circumstances surrounding the child.
"You don't instantly say there's a mental health disorder there but you say 'ok there may be a signal that there's something underlying that's gone wrong' ".
The charity said if people spot those signs in their child, the first step is to keep lines of communication open and try to see things from the child's point of view.
They urged parents to work with their child's schools so they have support in class and during non-teaching times.
Soars also encouraged parents not to view mental health issues with a stigma.
He said: "As Christians we often say 'get yourself together, pray and all the issues will disappear'.
"But actually, the underlying issues of mental health can be medical and really rooted in childhood or circumstances.
He continued: "As Christians we need to understand if things are difficult for a child or an adult going through mental health issues like anxiety or depression that it just can't be fixed, in the same way a broken leg just can't be fixed.
"You need to invest time and care into that and as Christians I think we're really good at that.
"We're really good at compassion, we're really good at standing alongside people, we're really good at showing mercy in difficult situations. "