“Is ADHD caused by trauma?”

No.

ADHD is highly genetic (about 80% hereditary¹) and is not caused by trauma, abuse, or “bad parenting”.

But here’s what makes this confusing: research shows that people with ADHD are actually more likely to experience adverse childhood events². And not because trauma causes ADHD, but because having ADHD as a child can set you up for more difficult experiences.

This happens in a few ways.

Undiagnosed neurodivergent parents may struggle with their own unmet needs and develop maladaptive coping mechanisms like substance abuse, creating a more chaotic home environment. Kids with ADHD also face more challenges in non-affirming school settings, experience more bullying, and encounter more ableist treatment. These, of course, add extra struggles on top of the neurodivergent experience, but they do not cause the neurodivergence. The ADHD comes first; the additional trauma often follows.

It’s crucial to understand this distinction. Attributing ADHD symptoms to trauma alone means someone might not get the support they actually need. Trauma and ADHD can, and should, be addressed separately, but they require different approaches. Trauma deserves healing, and ADHD deserves recognition and accommodation. One doesn’t negate or explain away the other.

If ADHD is not caused by trauma, why does this myth persist?

As Dr Russell Barkley explains, despite hundreds of studies showing otherwise, some people still propagate the trauma-based theories of ADHD. “[It] does real harm as it contradicts what the scientific literature is telling us.“³

These oversimplified explanations ignore the complex relationship between ADHD and adverse experiences, potentially preventing people from getting an accurate diagnosis and appropriate support.