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ADHD is usually described in three main areas: hyperactivity, inattention, and impulsivity. Some children show all three, while others lean more strongly in one direction.

Hyperactive ADHD traits
When people think of ADHD, this is often what they picture.
Hyperactivity in children can look like:
  • constant movement or restlessness
  • struggling to sit still, even when trying
  • very high energy levels throughout the day
  • difficulties settling at night or disrupted sleep
  • impulsive or risk-taking behaviour
  • frequent fidgeting or talking
This type of ADHD is often noticed early because it’s visible and can impact behaviour at home or school.
Inattentive ADHD in children.

Not all ADHD looks loud or busy on the outside.
Inattentive ADHD is sometimes described as “internal hyperactivity” and can be much easier to miss. Children with this profile may:
  • daydream or lose focus easily
  • struggle to switch off their thoughts
  • overthink or worry excessively
  • appear quiet, withdrawn, or “in their own world”
  • be labelled as lazy, anxious, or not trying
Because these traits are less disruptive, inattentive ADHD in children is often overlooked or misdiagnosed, particularly in girls.
Impulsivity and emotional regulationImpulsivity isn’t just about behaviour. It also affects emotions.
A child with ADHD may:
  • act without thinking things through
  • interrupt others or struggle to wait their turn
  • react very quickly to frustration or disappointment
  • experience big emotions that feel overwhelming in the moment
These emotional responses are not deliberate or manipulative. They are linked to how the ADHD brain processes regulation and impulse control.

When ADHD behaviours might be something else.
It’s important to say this clearly: noticing ADHD-like traits does not automatically mean your child has ADHD.
Many behaviours linked to ADHD are also common in young children, especially under the age of five. Tiredness, anxiety, stress, sensory overload, or major changes can all affect attention, behaviour, and emotional regulation.
What tends to matter most is consistency and impact. If difficulties are:
  • present across different settings
  • ongoing rather than occasional
  • becoming more noticeable as your child grows or reaches puberty
then it may be worth exploring further.

What to do if you think your child has ADHD (UK)
If you’re wondering how to know if your child has ADHD, a good first step in the UK is speaking to your GP. They can discuss your concerns and, if appropriate, refer your child for an ADHD assessment through CAMHS or another specialist service.
Some parents also find screeners helpful as an initial sense-check. The Child Mind Institute offers a free online ADHD screener for children and teens. This isn’t a diagnosis, but it can help you decide whether further assessment might be worthwhile.

When you’re not sure whether to take this further
Questioning whether your child might have ADHD can feel heavy. Many parents worry about labels, judgement, or getting it wrong. Wanting clarity and support doesn’t mean there’s something “wrong” with your child. It means you’re paying attention.
If you’re supporting a child with possible ADHD and want practical guidance around transitions, emotional regulation, and everyday strategies, you can find resources on my shop page. If you’re feeling unsure what to do next, you’re welcome to book a free 30-minute chat and we’ll talk it through.


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Hi, I’m Louise Belshaw, an ADHD coach, educator, and advocate for neurodivergent learners. I am passionate about helping neurodivergent students thrive. On The ADHD Teacher blog, I share practical tips and insights for parents, teens, and educators navigating ADHD.