ADHD and Highly Sensitive Person: Difference, Overlap — and What It Means to Have Both

Many women who eventually receive an ADHD diagnosis spent years describing themselves as highly sensitive. Or they'd been told by someone else that they were. Sensitive to criticism, easily overwhelmed, deeply affected by other people's emotions, exhausted by environments that others seem to handle effortlessly.

These experiences are real. And they fit both ADHD and the concept of high sensitivity (HSP). Which raises the question: are they the same thing? Different things? Can you be both?

"I identified as highly sensitive for years. It felt true and it felt useful — it explained a lot about why I was different. Then I got an ADHD diagnosis and realised: it wasn't either/or. Both were real. Both were happening. And they interact with each other in ways I'm still figuring out."

What HSP actually is

The term Highly Sensitive Person (HSP) was introduced by psychologist Elaine Aron in the 1990s. It describes a trait — not a disorder — characterised by deeper processing of sensory and emotional information, heightened awareness of subtleties, greater emotional reactivity, and stronger responses to overstimulation.

High sensitivity affects roughly 15–20% of the population. It's not a clinical diagnosis. It's a personality trait, like introversion — described on a spectrum, not in binary terms.

What ADHD actually is

ADHD is a neurodevelopmental condition characterised by differences in attention regulation, executive function, impulse control, and emotional regulation. It involves specific neurological differences in the prefrontal cortex and dopamine system. It is diagnosable, treatable, and associated with significant functional impairment.

Where they overlap — and where they differ

Can you have both?

Yes. Research suggests that a significant proportion of people with ADHD also have high sensory sensitivity — though the exact overlap is not fully established. The two traits can coexist and interact, which can make each more intense and harder to manage.

For women in particular, this combination often goes unrecognised for decades. The sensitivity explains the emotional and sensory experiences. The ADHD explains the attention regulation difficulties, the task initiation problems, the impulsivity, and the executive dysfunction. Neither explanation alone is complete.

How to tell what's driving what

Questions that point more toward HSP: Do you process information deeply and notice details others miss? Do you feel easily overwhelmed in stimulating environments, but recover after quiet time? Are your emotional responses deep and persistent but not sudden and dysregulated?

Questions that point more toward ADHD: Do you struggle to start and finish tasks regardless of how interested you are? Is your attention hard to direct and sustain? Do you have significant difficulty with organisation, time management, and working memory? Are your emotional responses intense, sudden, and hard to regulate?

If both columns feel accurate — that's important information. Both can be present. Getting a proper ADHD assessment is the only way to know for certain.