Why AuADHD Can Be Missed in Childhood: Understanding Masking
For many Australian families, a dual diagnosis of AuADHD (co-occurring Autism and ADHD) arrives after years of feeling like something wasn’t quite adding up. Parents often ask us the same question: if my child has both Autism and ADHD, why didn’t anyone pick up on it sooner?
The answer usually comes down to two things working together: the way Autism and ADHD traits can overlap and in order to fit in or cope, the person could be masking.
Understanding why AuADHD is so often missed in early childhood can help families look back on past struggles with more compassion – and move forward with the right, neurodiversity-affirming support.
Key Takeaways
- Masking is the effort – conscious or not – to hide neurodivergent traits and blend in with neurotypical peers
- Autism and ADHD traits can overlap.
- Academic success often hides real executive functioning struggles
- Girls and high-masking children are frequently misdiagnosed with anxiety or mood disorders instead of AuADHD
- Long-term masking has a real cost, including AuADHD burnout
- A neurodiversity-affirming assessment looks at the internal experience, not just outward behaviour
What Is Masking in Neurodivergent Children?
Masking – sometimes called camouflaging or compensating – is when a neurodivergent child learns to hide their natural traits to meet neurotypical expectations and fit in socially.
In practice, this can look like:
- Forcing or mimicking social cues – suppressing a natural aversion to eye contact, or copying the tone, slang, and body language of peers
- Suppressing stimming – holding back repetitive movements like hand-flapping, rocking, or leg-bouncing at school
- Internalising distress – pushing down anxiety or sensory overload during the day, only for it to surface as a meltdown or shutdown once home (sometimes called after-school restraint collapse)
- Hyper-vigilance – constantly scanning social situations to avoid saying or doing the “wrong” thing
It’s exhausting work. Much of it happens without the child – or the adults around them – fully realising it’s happening at all.
How Autism and ADHD Can Mask Each Other
When a child has both Autism and ADHD, the traits don’t just add together. They interact in ways that can hide the underlying neurodivergence from teachers, GPs, and even parents.
- Structure vs. spontaneity cancels out the obvious signs
Autistic traits often crave routine and predictability. ADHD traits pull towards novelty and spontaneous shifts in focus. From the outside, a child caught between the two can simply look moderately flexible, rather than visibly struggling. - High academic performance can hide executive function difficulties
Many AuADHD children lean on hyperfocus (an ADHD trait) or intense special interests (an autistic trait) to do well in the early years of school. Teachers see a bright, capable student – and can miss the executive dysfunction, internalised anxiety, or sheer exhaustion it takes to keep that performance up. - Hyper-awareness can suppress visible hyperactivity
An ADHD impulse to move or speak can be held in check by an autistic fear of breaking rules or facing social rejection. Instead of showing up as physical hyperactivity, it often turns inward – racing thoughts, chronic muscle tension, or persistent anxiety.
Why AuADHD Is Often Missed in Girls and High-Masking Children
Much of the original diagnostic criteria for Autism and ADHD was built around presentations typically seen in young boys – overt hyperactivity, obvious social withdrawal.
Girls and high-masking children often present quite differently:
| Presentation | What it often looks like |
| Internalised anxiety | Quiet worry, perfectionism, or low mood rather than disruptive behaviour in class |
| Social motivation | Strong drive to form friendships, with enormous hidden effort spent studying social dynamics |
| Common misdiagnoses | Generalised anxiety, mood disorders, or simply being labelled “shy” or “difficult” |
Because these presentations don’t match the stereotype many people still associate with Autism and ADHD, high-masking children can go years without the right support – even while clearly struggling underneath.
The Hidden Cost of Prolonged Masking
Masking can help a child get through the school day. But keeping it up takes a real toll over time, and has been linked to:
- AuADHD burnout – significant physical, mental, and emotional exhaustion, sometimes with a noticeable loss of skills or day-to-day functioning
- Mental health difficulties – a higher likelihood of chronic anxiety, depression, and low self-esteem from feeling that one’s natural self isn’t acceptable
- Delayed support – missing out on classroom accommodations, sensory adjustments, and allied health input during the years they’d help most
How a Neurodiversity-Affirming Assessment Helps
Identifying AuADHD – in early childhood, adolescence, or later – isn’t about finding something “wrong.” It’s about giving a child’s internal world language and understanding, so the right support can follow.
A neurodiversity-affirming assessment looks past outward behaviour to consider:
- Internal experiences, sensory processing, and emotional regulation
- The real energy cost of school, social settings, and daily transitions
- Individual strengths, hyperfocus interests, and practical accommodations that let a child thrive without needing to mask
Frequently Asked Questions
What’s the difference between Autism, ADHD, and AuADHD?
AuADHD refers to the co-occurrence of Autism and ADHD in the same person. Because the two conditions can mask each other’s traits, AuADHD is often identified later than either condition alone.
At what age can AuADHD be assessed?
AuADHD can be assessed from early childhood through to adulthood. Many families come to us after noticing traits in primary school, but it’s just as common for assessment to happen later, especially for high-masking children.
Is masking always a bad thing?
Masking is a survival strategy, not a flaw – but sustained masking without understanding or support can lead to burnout. The goal of an affirming assessment isn’t to stop masking altogether. It’s to help a child and family understand when and why it’s happening.
Seeking Clarity for Your Child
If you suspect your child may be masking their struggles or experiencing co-occurring AuADHD, an evaluation with an experienced child psychologist can offer real answers and a clear way forward.
At Sydney Child Psychology Services, we provide evidence-based, neurodiversity-affirming assessments for children and adolescents in Croydon Park, Sydney, with face to face and telehealth appointments available across New South Wales.
If you or your child are in crisis, please contact Lifeline on 13 11 14 or, in an emergency, call 000.
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