For kids with ADHD, how do you tell hyperactivity from anxiety?

Hyperactivity and anxiety can look very similar from the outside, especially in children. Clinically, I focus on the quality and timing of the movement. ADHD-related hyperactivity is usually constant and baseline. The child fidgets, moves, talks, or squirms across many situations, even when they’re calm, happy, or engaged in something enjoyable. The movement often seems automatic and not clearly tied to worry. Anxiety-driven restlessness tends to be more situational. It increases in specific contexts, like new environments, transitions, performance situations, or separation. The movement is often accompanied by visible tension, reassurance-seeking, or verbalized worries, and it may settle once the child feels safe or the stressor passes. I also look at intent and relief. With ADHD, movement often helps the child regulate and focus. They may not even notice they’re doing it. With anxiety, restlessness is more about discharging nervous energy, and the child often feels distressed or keyed up while moving. Attention patterns matter too. In ADHD, inattention and impulsivity usually show up alongside hyperactivity and are present even when anxiety is low. With anxiety, attention problems are often secondary and improve when the child feels calmer. Finally, I look at the emotional aftermath. ADHD-related movement doesn’t usually leave a child emotionally drained. Anxiety-related restlessness often comes with fatigue, irritability, or emotional collapse afterward. It’s also very common for kids to have both ADHD and anxiety, which can blur the picture. That’s why diagnosis is based on patterns over time, across settings, not a single behaviour. Understanding the driver matters because it guides treatment and helps the child feel understood rather than mislabelled.