What are the early signs of ADHD in children?

Early signs of ADHD are inattention (forgetfulness, distraction), hyperactivity (restlessness, fidgeting) and impulsivity (interrupting, not waiting), usually present before age 12 and in more than one setting.

The three groups of signs

ADHD (attention deficit hyperactivity disorder) shows up as a mix of three behaviour patterns. Most children have signs of both inattention and hyperactivity-impulsivity; some lean mainly to one.

• Inattention: easily distracted, finds it hard to follow instructions or finish tasks, loses everyday things, forgets routines like brushing teeth or putting socks on.
• Hyperactivity: always on the go, fidgets or taps hands and feet, talks noisily, gets up and moves around when they're meant to stay seated.
• Impulsivity: finds it hard to wait their turn, blurts answers out, interrupts conversations or other children's play.

Age and setting matter

The NHS notes that these signs usually begin before age 12. The clinical picture clinicians use to diagnose ADHD (set out in NICE guideline NG87) looks for signs that are more frequent and more severe than you'd expect for the child's age, that show up in more than one place (typically home and school), and that get in the way of learning, friendships or family life.

A lot of young children, especially under 5, are naturally distractible, restless and impulsive. On its own that is not ADHD, and it can also point to tiredness, anxiety or stress. What sets ADHD apart is the degree and the way it shows across different situations, not a single hard day.

Why girls are often missed

ADHD is recognised less often in girls than in boys. Girls more commonly have the inattentive pattern - quiet daydreaming, disorganisation, forgetfulness - rather than the obvious hyperactivity teachers spot first. If your daughter is bright but exhausted, anxious or struggling to keep up with no clear reason, inattentive ADHD is worth raising even without the "bouncing off the walls" picture.

This page is general information, not clinical or legal advice.