Lisa's call resonated with what I hear from many other parents of children and teens. Scanning for Certainty, Stuck in WorryThese kids' overthinking brains keep scanning for certainty. Lilly, in particular, had a tough time letting go of thoughts that her friends secretly don't like her, even though there was no evidence of this. Instead, it is a driver of anxiety and stunted confidence in so many children who struggle with it. That's because these children and teens have incessant worry loops and a need for reassurance that does not calm their anxiety.