My son was diagnosed with combined-type ADHD at 9. I'd known something was different since he was three. The health visitor said "spirited." His first teacher said "boisterous." The second said "disruptive." The third said "have you considered ADHD?" and that was the crack in the door that led to assessment.

The signs of ADHD in children are not always the signs you'd expect. The bouncing-off-the-walls boy is one version. The daydreaming girl who "just needs to focus" is another. The bright child whose school reports say "doesn't reach their potential" year after year is a third. They can all be ADHD. They can all be missed for years.

This checklist is what I wish someone had handed me when my son was four. Tick what you recognise. Print what you tick. Take it with you.

What the childhood ADHD symptoms checklist actually measures

The checklist above maps to the three DSM-5 presentations, in parent-facing language rather than clinical categories. Movement and impulse covers the hyperactive-impulsive signs that tend to be most visible. Attention and learning covers the inattentive signs that are often missed, especially in quieter children. Emotions and home life covers emotional regulation, the area most ADHD checklists online leave out entirely, and the area where girls and inattentive-presenting children often show up most clearly.

For a diagnosis to be considered, NHS guidance requires that symptoms are present in at least two settings (home and school, for example) for at least six months, and that they're causing genuine impairment. This is why parents often feel dismissed when school "doesn't see it": teachers observe a child who is masking, compliant, or simply less obviously impaired in a structured environment. What you see at home counts. Bring evidence of both settings if you can.

ADHD symptoms by age: what it looks like from toddlers to teens

ADHD does not look the same at every age, and the presentation that dominates shifts as children develop.

Under 5. Hyperactive-impulsive features tend to dominate here: constant movement, climbing, running, meltdowns, sleep chaos. These are easy to dismiss as "being a toddler," because they overlap significantly with typical toddler behaviour. What distinguishes ADHD in this age group is intensity and persistence, behaviour that is clearly outside the normal range for their age, and that does not improve with consistent boundaries.

5 to 11. School surfaces the inattentive features that home may have masked. Homework battles, lost items, teacher comments about effort rather than ability, emotional regulation struggles, friendship difficulties. For some children, masking starts here: they hold it together at school and fall apart the moment they walk through the door at home. School reports that say "easily distracted" or "could try harder" year after year are worth taking seriously.

11 to 16. This is where inattentive and combined-presentation children, especially girls, most often get picked up. The jump in executive function demands at secondary school overloads the coping strategies that worked at primary. Homework without scaffolding, multiple teachers, lockers, timetables. Mental health referrals for anxiety and depression at this age are worth following up with an ADHD question, because anxiety and low mood are frequently how undiagnosed teenage ADHD presents in girls.

Teenage ADHD symptoms that often get missed

ADHD in teenagers is frequently mistaken for laziness, defiance, or "just being a teenager." The teenage picture: chronic lateness despite trying, homework done at the last minute or not at all, a bedroom that looks chaotic regardless of how often it's tidied, emotional volatility and conflict with parents and teachers, risk-taking, and social intensity that burns through friendships quickly.

ADHD symptoms in teens look different from the primary-school version. The hyperactivity often internalises: teens describe it as a constant restlessness, an inability to relax, a racing inner monologue. Impulsivity shows in spending decisions, relationship choices, and what teens say before they've thought it through. Time blindness is particularly disabling in the GCSE years, when the distance between "I'll start next week" and the exam is invisible until it isn't.

Higher diagnosis rates in teenage boys do not mean lower ADHD prevalence in teenage girls. They mean later detection. A teenage girl who has been managing her ADHD quietly, through people-pleasing, perfectionism, and social performance, often gets her diagnosis triggered by a significant life event: GCSEs, a breakup, a move, or simply the cumulative weight of holding everything together for a decade.

ADHD symptoms in children that might actually be something else

A referral is not the end of the question: it is the beginning of one. These are the most common conditions a good assessment will want to consider alongside ADHD.

Sensory processing differences. A child who is overwhelmed by noise, texture, or unexpected touch can look hyperactive, distracted, or defiant when they're actually dysregulated by their environment. Sensory needs can coexist with ADHD or produce ADHD-looking behaviour on their own.

Anxiety. Anxious children look inattentive because their attention is on the thing they're worried about. Anxiety and ADHD often co-occur, but anxiety can also be the primary driver. If the behaviour is worst in new or unpredictable situations, that's a useful signal.

Sleep problems. Chronically undersleeping produces attention and impulse-control problems that are clinically indistinguishable from ADHD. Bedtime battles need addressing regardless of what diagnosis follows.

Trauma, attachment, and adverse experiences. Children who have experienced loss, instability, or difficult early experiences can present with ADHD-looking behaviour. A careful assessment explores this; a rushed one doesn't.

Hearing and vision. Unchecked hearing loss or unaddressed vision problems can make children look inattentive or disruptive. Basic screening is quick and can save months of misdirection.

Iron deficiency. Often missed in children, especially picky eaters and girls approaching puberty. Low ferritin causes fatigue, poor concentration, and mood problems.

None of these is a reason to avoid ADHD assessment. They're reasons to make sure the assessment is thorough.

How to get an ADHD assessment for a child in the UK

Start with two things in parallel: a GP appointment and a conversation with the school SENCO. GPs can refer to community paediatrics (for younger children) or CAMHS depending on your area. The SENCO can begin observation, gather evidence across settings, and apply for an Education, Health and Care needs assessment if appropriate. Getting the school on board early makes a significant difference.

From the GP, you have the same three paths as adult assessment: NHS referral (long waits in most areas), Right to Choose (England only, availability for children's services varies by ICB), and private assessment. Private children's ADHD assessment costs between £1,000 and £2,500. Medication prescribing and shared care agreements vary by area; some ICBs are declining shared care from private providers, so check your local position. Browse providers in the Neuroequipped directory.

What to say to your GP about ADHD in your child

Use this, verbatim if it helps:

I've been noticing a pattern of behaviours in my child that could be ADHD. I've completed a checklist and ticked [X] out of 20 items, which I've brought with me. Before we discuss an ADHD referral, I'd also like to rule out sensory processing differences, anxiety, sleep problems, hearing and vision, and iron deficiency. Can we arrange basic screening and a referral to community paediatrics or CAMHS, depending on what's available locally?

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This article is part of the Neuroequipped ADHD guide. For the interactive checklist, scroll up. For the full hub, see ADHD guides. If you think you might have ADHD yourself, see the ADHD checklist for women or ADHD checklist for adults. It often runs in families.

Neuroequipped provides research-grounded information for parents navigating neurodivergence. It is not medical advice. If you have concerns about your child, speak to your GP, your child's school SENCO, or your local community paediatrics service.