Chapter 1: What is AuDHD?
You might have heard the term"AuDHD" recently and wondered what it means. Or maybe you've suspected for years that something about how your brain works doesn't quite match the typical descriptions of either autism or ADHD alone. The term AuDHD describes people who have both autism spectrum disorder and attention-deficit/hyperactivity disorder at the same time. This isn't just having two separate conditions that exist side by side. The two interact with each other in ways that create a distinct experience.
Think of it this way. If you have both nearsightedness and astigmatism, you don't just see two types of blur. The two vision problems combine to create one unique way of seeing the world. AuDHD works similarly. The autism and ADHD don't just add together—they multiply and interact, creating patterns that can look different from either condition on its own.
Understanding the Autism-ADHD Overlap
For many years, doctors believed you couldn't have both autism and ADHD. The diagnostic manual used to say if you had autism, you couldn't also have ADHD. That changed in 2013 when researchers recognized what many people already knew from their lived experience: these conditions often occur together.
Current research suggests that 30 to 80 percent of autistic people also have ADHD traits or meet full criteria for ADHD. That's a huge number. On the flip side, about 20 to 50 percent of people with ADHD also have autistic traits. The wide range in these numbers happens because researchers use different methods to measure and define each condition.
But what does this overlap actually look like? Let's break down how these two conditions interact:
Attention patternsshow up differently in AuDHD compared to ADHD or autism alone. People with ADHD typically struggle with sustained attention across many different tasks and situations. Autistic people often have intense, focused attention on topics of interest but may struggle to shift attention to other things. When you have both, you might hyperfocus intensely on your special interests (from the autism side) while also getting distracted easily by external stimuli when trying to focus on things that don't interest you (from the ADHD side). This creates a pattern where your attention feels both too much and not enough, depending on the context.
Social interaction challengesalso combine in unique ways. Autism affects how you naturally understand and process social cues. You might not instinctively pick up on body language or implied meanings. ADHD adds impulsivity and difficulty reading social timing—interrupting others, talking too much, or missing when someone wants to end a conversation. Together, these create social situations where you're simultaneously overthinking interactions while also acting impulsively.
Executive function difficultieshit from both sides. Executive functions are the brain's management system—planning, organizing, starting tasks, managing time, and shifting between activities. ADHD disrupts executive function through difficulty with activation, follow-through, and working memory. Autism adds rigidity in thinking, trouble with transitions, and a need for predictability. With AuDHD, you face the ADHD struggle of starting tasks combined with the autistic need for things to happen in a specific order. You might need routine and structure to function well, but also struggle to create and maintain those routines.
Sensory experiencesbecome more complex with AuDHD. Autistic sensory processing differences mean certain textures, sounds, lights, or smells can feel overwhelming or barely noticeable. ADHD adds difficulty filtering out background sensory information and trouble regulating responses to sensory input. The combination often means you're easily overwhelmed by sensory input but also seek out certain types of stimulation. You might hate loud noises but need to fidget constantly, or feel overwhelmed
