Inattentive ADHD is ADHD marked by trouble focusing, forgetfulness and disorganisation rather than hyperactivity. The NHS says it is more common in girls and missed more often, so girls seem 'dreamy', not disruptive.
What it looks like day to day
Inattentive ADHD shows up as the quiet, internal kind of struggle rather than the loud, fidgety kind. The NHS lists being easily distracted, finding it hard to listen or follow instructions, and forgetting everyday tasks. In a girl who has learned to keep her head down, that often looks like this:
- drifts off mid-task and seems to be daydreaming
- forgets homework, kit, instructions and belongings
- starts things but rarely finishes them; her bag, desk and bedroom are chaos
- appears quiet and well-behaved while quietly falling behind
- seems to be trying hard, even exhausting herself, to keep up
That last point matters. Many girls mask, meaning they work hard to hide the difficulty and copy what other children do, so the effort stays invisible and only the tiredness, anxiety or low mood shows.
Why it gets missed in girls
Inattentive ADHD is not a separate condition. It is one of three presentations of the same diagnosis: predominantly inattentive, predominantly hyperactive-impulsive, and combined. To meet the criteria, a child needs at least six of nine inattentive symptoms that have been present before age 12 and show up in more than one setting, such as home and school. The diagnosis is the same one a hyperactive boy might get; the presentation is what differs.
The reason it is missed in girls is that presentation, not less difficulty. NICE guideline NG87 states that ADHD is thought to be under-recognised in girls and women, who are less likely to be referred, more likely to have undiagnosed ADHD, and more likely to be given an incorrect diagnosis of another condition such as anxiety. The NHS makes the same point. A quiet, bright girl who is struggling on the inside is easy to read as 'just a daydreamer', 'lazy' or 'anxious', and so the ADHD goes unspotted.
Why this matters for you
The practical takeaway is that you do not need a diagnosis, or even certainty, before you act. A suspicion is enough to ask. If what you see at home matches the inattentive pattern, you can raise it with your GP or your child's school and ask for a referral for an ADHD assessment. The NHS route can involve a wait, so starting it early is worth doing even while you read up. Keeping a few notes of what you notice, and when, helps whoever assesses her see the pattern across settings.
Where the law comes from
Related
This page is general information, not clinical or legal advice.