When people ask whether children's mental health is worse than it was thirty years ago, most assume the answer is simply yes. The data is more interesting than that.

The picture depends entirely on which problems you are measuring and how. Behavioural difficulties, the external and visible kind, have remained broadly stable over the past three decades. Emotional difficulties, the internal kind, have worsened. UK data consistently shows declining life satisfaction in children. Covid did not create these trends but accelerated them, particularly for girls' rates of depression, and the evidence does not show stabilisation. We are not past it.

There are several competing explanations for why emotional difficulties have worsened, and they are not mutually exclusive. The first is structural: children are sleeping less, moving less, and being given fewer opportunities for independent, genuinely challenging experiences that build real rather than performed resilience. Adverse childhood experiences have not uniformly increased in prevalence, but their forms have shifted. Covid was itself an ACE at population scale.

The second explanation is more uncomfortable, and it involves us. Prevalence inflation is the phenomenon by which increased awareness and better reporting, both well-intentioned, have contributed to increased measured prevalence. When mild distress becomes a named condition, when the threshold for clinical concern lowers, when children learn to describe their ordinary difficult feelings in diagnostic language, the self-concept shifts. The label becomes part of the identity. The identity reinforces the pattern. This is not a reason to dismiss children's distress. It is a reason to be thoughtful about the frameworks we offer them for understanding themselves.

The implications for schools are significant. A child who learns "I have anxiety" and a child who learns "I sometimes feel anxious and have found ways to move through it" are not in the same position. One has an explanation. The other has a capability. StoryQuest consistently shows that when children are given complete creative freedom, what emerges is not just stories. It is direct experience of agency, of overcoming, of discovering what they are capable of when no one is correcting or limiting them. Seven transformations were documented across 318 children, and joy, resilience, pride, and social connection were among them. These are not literacy outcomes. They are the opposite of what prevalence inflation produces. They are children finding out that they can.