How ADHD shows up differently in Boys and Girls
Good news and a hard truth: ADHD is one of the most researched conditions in child development. The hard truth? Most of that research was done on boys.
That means millions of girls with ADHD have been overlooked, misdiagnosed, or told they just need to "try harder" when in reality, their brain is simply wired differently. I want to change that. In working with children and families, I have seen firsthand how understanding the difference in how ADHD presents can be life-changing. So let's break it down in a clear, simple way that is easy to read.
Quick note: This article uses the terms "boys" and "girls" to reflect how research has historically been conducted. ADHD can affect children of any gender identity, and every child deserves a comprehensive, individualized assessment.
How ADHD Often Looks in Boys
Boys with ADHD are more likely to display hyperactive and impulsive symptoms — the ones that are hard to ignore in a classroom (Gaub & Carlson, 1997).
You might see a boy who:
→ Cannot stay in his seat during a lesson
→ Blurts out answers before a question is finished
→ Runs, climbs, or moves constantly
→ Gets frustrated quickly and reacts strongly
→ Takes physical risks without thinking them through
These behaviors are visible. They affect the whole classroom. And because of that, teachers and parents tend to seek help sooner.
It means that a very different kind of child is getting left behind.
How ADHD Often Looks in Girls
Girls with ADHD are far more likely to have the inattentive presentation — the quiet kind. And quiet is easy to miss (Quinn & Madhoo, 2014).
You might see a girl who:
→ Daydreams constantly and loses track of where she is in a lesson
→ Forgets homework, materials, or instructions even when she tried to remember
→ Takes much longer than expected to complete assignments
→ Seems overly emotional or sensitive to criticism
→ Talks a lot socially, but still struggles to stay on task
→ Works extremely hard just to keep up and may appear disregulated because of it.
She is not disrupting the class. She is sitting quietly, nodding along, and falling further behind on the inside.
Something I have seen in my work: Girls with ADHD often develop what researchers call "masking". They work incredibly hard to appear fine. By the time a girl's struggles become undeniable, she may have spent years believing she is just not smart enough. That belief can follow her for a long time.
Research by Quinn and Madhoo (2014) found that girls with ADHD are significantly more likely than boys to develop anxiety and depression as a result of their undiagnosed or untreated ADHD. The ADHD was always there but it just looked like something else.
A Quick Side-by-Side
Most Common Type
Boys: Hyperactive-Impulsive or Combined
Girls: Inattentive
Visibility
Boys: High — noticeable in class
Girls: Low — easy to overlook
Typical Behavior
Boys: Restless, impulsive, disruptive
Girls: Daydreaming, forgetful, quiet
Masking
Boys: Less common
Girls: Very common
Common Co-occurring Conditions
Boys: Conduct issues, oppositional behavior
Girls: Anxiety, depression, low self-esteem
Average Age of Diagnosis
Boys: Earlier (often age 7–8)
Girls: Later (often adolescence or adulthood)
Why Does This Matter?
Because a child who is never identified never gets help.
A boy who cannot sit still is seen. A girl who cannot keep track of her life is told to get a planner.
Biederman and colleagues (2010) followed girls with ADHD for 11 years and found that those who went undiagnosed and untreated were at significantly higher risk for academic struggles, social difficulties, and mental health challenges by adolescence.
That is not inevitable. Early identification changes everything. And it starts with knowing what to look for.
What You Can Do Right Now
Whether you are a parent, a teacher, or someone who works with children, here are some starting points.
For parents:
→ Trust your gut. If something feels off, it probably is.
→ Look beyond behavior. Is your daughter exhausted at the end of every school day? Is she forgetting things constantly despite genuinely trying? Is she lashing out at home but in school she is wonderful?
→ Ask for a comprehensive evaluation. A behavior checklist is not enough and can easily overlook bigger signs. A good assessment takes time and considers the whole child.
For educators:
→ Consider the quiet ones too. The girl who is always daydreaming may need support just as much as the boy who can't stay seated.
→ Watch for signs of effort and exhaustion. A child working twice as hard just to keep up is telling you something.
→ Use gender-informed observation. Research shows that teacher referrals are significantly biased toward hyperactive presentations (Hartung & Widiger, 1998).=
A note from me: In my work, I take the time to really know my clients. Comprehensive assessment is not just about checking boxes. It is about understanding the full picture of who a child is. If you have questions about ADHD evaluation or want to talk through what you are seeing in your child, please feel free to reach out.
Final Thoughts
ADHD does not look the same in every child. And the children who are hardest to spot are often the ones who need support the most.
If this article resonated with you, whether you are a parent who finally feels seen, or an educator rethinking a student in your class, I would love to hear from you. Your feedback helps me reach more families.
As always, if you have any questions or thoughts, please feel free to reach out. That is what I am here for.
— Aleksandra Kordal, Insight Mental Health
ReferencesBiederman, J., Petty, C. R., Monuteaux, M. C., Fried, R., Byrne, D., Mirto, T., ... & Faraone, S. V. (2010). Adult psychiatric outcomes of girls with attention deficit hyperactivity disorder: 11-year follow-up in a longitudinal case-control study. American Journal of Psychiatry, 167(4), 409–417.Gaub, M., & Carlson, C. L. (1997). Gender differences in ADHD: A meta-analysis and critical review. Journal of the American Academy of Child & Adolescent Psychiatry, 36(8), 1036–1045.Hartung, C. M., & Widiger, T. A. (1998). Gender differences in the diagnosis of mental disorders: Conclusions and controversies of the DSM-IV. Psychological Bulletin, 123(3), 260–278.Quinn, P. O., & Madhoo, M. (2014). A review of attention-deficit/hyperactivity disorder in women and girls: Uncovering this hidden diagnosis. The Primary Care Companion for CNS Disorders, 16(3).