We must ensure that young girls are seen, screened, and supported, so they can start life with the understanding and tools they deserve, writes Cynthia Hammer.
Girls with ADHD ought to get diagnosed before their eighth birthday. But why age eight? Why not sooner? ADHD is a neurodevelopmental condition that begins in early childhood—often from birth—so the ideal time for diagnosis would be shortly after a child is born. In that ideal world, parents would be informed early that their daughter has a differently wired brain, giving them time to learn about ADHD and prepare the best support strategies long before school starts. Even better? Screening parents for ADHD before their first child is born, since ADHD is highly heritable. Diagnosed parents could be on the lookout for signs of ADHD in their children. But we aren’t there yet. For now, we aim for diagnosis before age eight—a realistic and essential fallback.
Boys get diagnosed, so why not girls? Historically, we’ve been more familiar with the hyperactive, disruptive presentation of ADHD—commonly observed in boys. That’s why boys are diagnosed two or three times more often than girls, usually by age seven. Girls, on the other hand, are often diagnosed years later—at age twelve, or even well into adulthood. We still don’t know whether ADHD is actually more common in boys, or if it’s simply more often recognized in them. What we do know is that many girls continue to be missed.
Delayed or missed ADHD diagnoses in girls come with consequences. These girls may be labeled as lazy, messy, unmotivated, or “too much”, when in reality they are struggling with a brain-based condition. Over time, these negative messages become part of their inner voice, eroding their self-esteem and leading to shame, perfectionism, anxiety, and even self-hatred.
Many girls with ADHD learn to mask, hiding their difficulties in order to blend in. Masking may help a child fit in temporarily, but it can be psychologically damaging when it’s done out of fear of rejection. Worse, it can delay diagnosis, as masked behaviours make ADHD less visible. The younger a girl is, the less likely she is to have developed masking habits—making early diagnosis more attainable.
As years go by without support, girls with ADHD are more likely to develop co-occurring conditions like anxiety and depression. In many cases, these are not separate disorders but downstream effects of living with untreated ADHD.
The neuroplastic brain
Young brains are highly neuroplastic. They are better able to form new connections, adapt, and learn. The earlier a girl understands her ADHD and receives support, the more naturally she builds the habits and tools she needs to thrive. New behaviours can be reinforced into lasting change through repetition and support, especially if medication is part of the plan, as stimulants can enhance neuroplasticity. When diagnosis happens later, unlearning harmful patterns becomes harder—and building new ones takes more time and effort. Early diagnosis sets the stage for long-term success.
That’s why we need to educate parents, teachers, and clinicians about how ADHD shows up in girls. Teachers are especially crucial. Unlike parents, they see children in structured settings all day long, and they’re trained to notice when something seems off. However, teachers need better training on the many ways ADHD can present, especially in girls.
Parents, too, can unintentionally miss the signs. They might give repeated prompts for simple tasks, such as Put on your pyjamas, Brush your teeth, not realising that their child should be managing these on her own by age seven.
The American Academy of Pediatrics recommends that ADHD diagnoses start at age six, except in extreme cases. Many clinicians wait until age seven, when academic challenges provide more evidence. But we must push earlier, especially when symptoms are already interfering with a child’s functioning. The earlier we start supporting a girl with ADHD, the better her outcomes—emotionally, socially, and academically. Diagnosis is just the beginning. What matters most is how we respond—with education, compassion, strategies, and strength-based support.
Let’s give our girls the early start they deserve.
Author: Cynthia Hammer
Cynthia Hammer
Cynthia Hammer MSW is based in the Pacific North-West of the United States. She is the founder of FINDtheADHDgirls.org and Executive Director of the nonprofit Inattentive ADHD Coalition. Her book Living with Inattentive ADHD is published by Random House.
