ADHD (Attention-Deficit/Hyperactivity Disorder) is a neurodevelopmental condition that affects how the brain regulates attention, activity, and impulses. It is not a matter of willpower or intelligence — it reflects genuine differences in how certain brain networks develop and communicate. ADHD begins in childhood and often continues into adulthood, though the way it shows up tends to change across a lifetime.
Three core presentations
Clinicians describe ADHD in three patterns: predominantly inattentive, predominantly hyperactive-impulsive, and combined. Recognising which pattern fits helps explain why two people with the very same diagnosis can look quite different.
- Inattentive: difficulty sustaining focus, losing track of details, and being easily distracted.
- Hyperactive-impulsive: restlessness, acting before thinking, and a constant need to move.
- Combined: a mix of both, which is the most common presentation.
More than “trouble focusing”
ADHD also affects what specialists call executive function — the mental skills we use to plan, prioritise, manage time, and regulate emotion. This is why everyday tasks like starting a project, remembering an appointment, or sitting through a long meeting can feel disproportionately hard, even for capable and highly motivated people.
Why an accurate diagnosis matters
With understanding comes relief. A clear diagnosis replaces years of self-blame with a framework that actually fits, and it opens the door to strategies, accommodations, and — where helpful — treatment. Many people tell us their assessment was the first time their experience finally made sense.