What ADHD actually is
Attention-deficit/hyperactivity disorder is a neurodevelopmental condition, a difference in how the brain manages attention, impulses and activity, not a character flaw and not a lack of effort. According to the National Institute of Mental Health, symptoms begin in childhood and often continue into adulthood, though they can look very different at different ages.
None of it means you are not smart or not trying. Most people we see have spent years trying harder than everyone around them.
The three ways it shows up
NIMH describes ADHD through three kinds of symptom, inattention (losing the thread, losing the keys, losing the afternoon), hyperactivity (moving, fidgeting, talking, at moments when everyone else is still), and impulsivity (interrupting, intruding, struggling to wait). Which of them dominates is what clinicians mean when they talk about ADHD “presentations”:
- Mostly inattentive. Quiet, drifting, disorganised, easily lost in a task or lost to one. This is the presentation that gets missed for decades, because it never disrupted a classroom.
- Mostly hyperactive-impulsive. Restless, fast, first to speak and first to move. Usually spotted early, because everyone around it notices.
- Both together. The most common picture in the people we evaluate, and the one where inattention often only becomes visible once the restlessness settles with age.
The presentation is not a fixed label. It commonly shifts across a life (the child who could not sit still becomes the adult who cannot start), and treatment follows the pattern you have now, not the one you had at eight.
How ADHD is diagnosed
There is no blood test, brain scan or single questionnaire for ADHD. It is a clinical diagnosis, made by a provider who takes the time to build a picture across your whole life, and that assessment is what a psychiatric evaluation is for. What it looks at:
- A history that reaches back to childhood. ADHD is a developmental condition, so an evaluation asks what school, home and friendships were actually like, not just what this month has been like. Old report cards, if you still have them, are unexpectedly useful.
- More than one setting. According to the National Institute of Mental Health, the behaviors in ADHD are frequent and occur across multiple situations, at school, at home, at work, or with family and friends. A problem that exists only in one job, with one boss, points somewhere else.
- Real-world cost. Symptoms that are noticeable but not getting in the way are not a disorder. What matters is what attention and impulse control are costing you in the parts of life you care about.
- What else could explain it. Anxiety, depression, trauma, sleep disorders, thyroid problems, substance use and hearing or vision difficulties can all produce something that looks like ADHD, and several of them can also sit alongside genuine ADHD. Ruling in and ruling out is most of the work.
- Someone else’s view, where it helps. With children, parents and school reports are part of the picture. With adults, a partner or a parent often remembers what you cannot.
We evaluate children and adults. If the answer is not ADHD, you still leave with an answer. That is the point of assessing properly rather than prescribing quickly.
What causes ADHD
Nobody can yet name a single cause. NIMH describes research into genes, hormones and other molecules, brain structure and activity, and prenatal and early-life exposures, which is to say the evidence points at biology and development, and it points hard at family history: ADHD runs in families, and it is common for a parent to recognise themselves halfway through their child’s evaluation.
What it is not caused by is the list people arrive carrying: not laziness, not low intelligence, not bad parenting, and not a moral failing anyone should be apologising for. Understanding that is often the first thing treatment actually changes.
ADHD in children, and in adults
In children, ADHD often looks like the classroom: unfinished work, a desk that erupts, a teacher’s note that says “if only they applied themselves.” In adults it tends to go quieter. Missed deadlines, a career below your ability, relationships strained by forgetfulness, and a private exhaustion from holding it all together.
Adults are also more likely to have picked up company along the way. Anxiety, low mood and sleep problems commonly travel with untreated ADHD, and part of a good evaluation is working out which is which, because treating the wrong one first rarely works.
How treatment works here
Everything starts with a psychiatric evaluation: your history, your symptoms now, and what else could explain them. If ADHD is the right explanation, treatment is built with you, not handed to you. For many people that means medication management. Stimulant or non-stimulant options, started carefully and adjusted in follow-up until the dose actually fits. For many it also means therapy focused on the practical side: routines that hold, systems for time and tasks, and repairing what years of “why can’t you just” have done to your confidence.
We treat children and adults, in person in Baltimore, Washington, D.C. and Delaware, Ohio, and by secure video across both.
When to reach out
If attention, restlessness or follow-through is costing you school, work or relationships, or your child’s teacher keeps raising the same flags. An evaluation is the useful next step. It does not commit you to medication or to anything else. It answers the question.