ADHD in Children: What Parents Need to Know

If you’ve noticed your child struggling to focus, acting impulsively, or finding it impossible to sit still and wondered whether it’s more than just “being a kid,” you’re not alone. ADHD in children is one of the most common neurodevelopmental conditions in the UK, and for many parents, knowing where to start can feel overwhelming.

This guide is here to help.

ADHD doesn’t look the same in every child. There are three recognised presentations, defined by the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition), the global standard for diagnosing mental health conditions, published by the American Psychiatric Association. In the UK it is used alongside the ICD-11, the equivalent framework published by the World Health Organization. Both recognise the same three presentations and are equally valid for diagnosis.

The DSM-5 uses the term “presentations” rather than “subtypes” because symptoms can be fluid across a child’s lifespan rather than fixed traits. A child who presents with combined ADHD at age seven may look quite different by their teenage years.

Some of the most common signs parents notice day to day:

No single sign means your child has ADHD. But if several of these show up consistently across multiple settings, at home, at school, and in social situations, it’s worth exploring further.

This is one of the most common questions parents ask, and it’s a fair one. All children are sometimes inattentive, restless, or impulsive. The difference with ADHD is persistence and impact.

To meet the diagnostic criteria, symptoms must be present for six months or more, to a degree significantly greater than others of the same age, in at least two settings, such as both home and school, and must directly interfere with the child’s quality of functioning.

If your child’s teacher is raising concerns, they’re falling behind academically, friendships are suffering, or home life is consistently strained, those are meaningful signals, not just a phase.

Diagnosis follows guidelines set by NICE (the National Institute for Health and Care Excellence), the independent body that sets clinical standards for healthcare in England and Wales.

NICE states that a diagnosis should only be made by a specialist psychiatrist, paediatrician, or other appropriately qualified healthcare professional with training and expertise in ADHD. A specialist psychiatrist is a medical doctor trained in mental health conditions. A paediatrician is a doctor specialising in children’s health and development.

There’s no blood test or brain scan that diagnoses ADHD. The assessment involves gathering detailed information about your child’s behaviour across different settings, drawing on input from you and from their school.

The typical NHS route goes through your GP (General Practitioner), your family doctor and first point of contact for most health concerns. They take a history and, where appropriate, refer your child to CAMHS (Child and Adolescent Mental Health Services), the NHS service responsible for assessing and supporting children’s mental health and neurodevelopmental needs. From there, the process broadly follows these steps:

Here’s where things get difficult, and where a lot of parents find themselves right now.

As of December 2025, there were 562,450 open referrals for a possible ADHD diagnosis in England, with around two thirds of children, 65.8%, having been on a waiting list for over a year. In some regions, waiting times have grown beyond 10 years, and some trusts have closed their waiting lists entirely to new referrals.

To give that some regional context:

These delays have real consequences. Without a formal diagnosis, many children can’t access an EHCP (Education, Health and Care Plan), a legal document issued by your local council that sets out exactly what support a child with additional needs is entitled to receive from their school. To apply, parents request an EHC needs assessment directly from their local authority, though without a diagnosis, getting approved is significantly harder.

The NHS’s own ADHD Taskforce has acknowledged that untreated ADHD costs the UK around £17 billion per year, reflecting the long-term impact when children don’t get support early enough.

If you’re facing a long NHS wait and need answers sooner, a private ADHD assessment is a route many families are taking. You don’t need a GP referral, and appointments can often be arranged within days rather than months.

KPI:Access is a healthcare connector service that links families with qualified specialists who carry out ADHD assessments for children in London and Croydon. Specialists work to the standards set by NICE and the Royal College of Psychiatrists, the professional body that sets standards for psychiatric care in the UK.

KPI:Access is part of KPI:Health, a wider healthcare group that has connected over 300,000 people with assessments and treatments across the UK. Of those, 99.2% rated their experience as good or very good, with governance incidents recorded in only 0.06% of cases.

A diagnosis isn’t the end of the road. It’s the beginning of things making sense. Children who are diagnosed can access the right school support, appropriate treatment, and a framework that helps their whole family understand how they think and learn.

Treatment for children with ADHD typically involves a combination of approaches, tailored to the child’s age, presentation, and needs:

Every child is different. The goal is finding what works for your child specifically.