ADHD

Hyperactivity starts physically. Typically, as people age, they learn to stop paying attention to their physical urges. When you suppress that physical movement to appease an unaccommodating room, the hyperactivity does not vanish; it turns inward into mental and thought-based hyperactivity. It causes a lot of people to overlook this entirely. I only have to ask about 3 questions and I can chart a diagnosis. ADHD shows up in muscle tone and tension so I can tell in about 2 seconds if a person has ADHD. 

For parents, your child is not broken, defiant, or failing to pay attention. Calling it an attention deficit is an outside-in label made up by people who are annoyed that a kid is not looking where an adult wants them to look. Your child's nervous system is managing real-time perceptual input without an automatic filter. Punishing them into stillness or forcing compliance does not regulate them; it just accelerates the process of driving that physical energy inward into chronic anxiety.

For young adults and anyone diagnosed late in life, this explains the engine in your head that refuses to shut down. You spent years learning to ignore what your body was asking for so you would not get singled out. That suppressed motor energy became racing thoughts, chronic restlessness, insomnia, and executive burnout. You are not lazy, undisciplined, or defective.