Autism and ADHD in adults: understanding AuDHD
Quick answer: AuDHD describes the experience of being both autistic and having ADHD at the same time. In adults, autism and ADHD often pull in opposite directions, one part of you may crave routine and predictability, while another seeks novelty and stimulation. This internal tension is real, common, and far more understandable once you see how both neurotypes shape your nervous system, emotions, and sense of self.
Have you ever felt like two parts of you are quietly at war? Perhaps you long for order, yet you also crave excitement. You plan carefully, then abandon the plan on a whim. If this sounds familiar, you may be living with AuDHD, the co-occurrence of autism and ADHD.
For many adults, recognising this combination brings a wave of relief. The contradictions that once felt like personal failings begin to make sense. This post explores what autism and ADHD look like together in adulthood, why they can feel so confusing, and how to relate to yourself with more understanding.
If you are new to these topics, my earlier article on the complexities of trauma, autism, and ADHD offers helpful background. This post extends that work by focusing specifically on what happens when both neurotypes meet in one person.
What is AuDHD?
AuDHD is an informal term for being autistic and having ADHD at the same time. For a long time, professionals believed the two could not co-occur. We now know that is incorrect.
Research increasingly recognises that autism and ADHD frequently overlap, with a significant proportion of autistic people also meeting criteria for ADHD. Each shapes how you think, feel, and move through the world. Together, they create a distinct experience that neither label fully captures on its own.
Importantly, AuDHD is not simply autism plus ADHD added together. It is a unique blend, where the two neurotypes interact, sometimes amplifying each other and sometimes pulling in opposite directions. If you want to learn more, explore our online courses, Creating insight into your ASD & ADHD.
Why autism and ADHD can feel like opposites inside you
This is often the part that confuses adults most. Autism and ADHD can produce competing needs within the same nervous system. Autism may draw you towards routine, predictability, and deep focus. ADHD may pull you towards spontaneity, novelty, and changing interests. One part craves sameness; the other craves stimulation. You might over-plan, then struggle to follow through. You might need quiet and structure, yet feel restless inside it. This isn't inconsistency or laziness. It is two genuine sets of needs, both belonging to you, trying to be met at once.
How does Polyvagal Theory help us understand AuDHD?
Stephen Porges's Polyvagal Theory offers a gentle lens for this experience. Central to it is neuroception, the way your body automatically scans for cues of safety or threat, beneath conscious awareness. For many AuDHD adults, neuroception is highly active. Sensory input, social demands, and unpredictable change can all register as threat, shifting the body into defensive states such as fight, flight, or shutdown. The challenge of AuDHD is that the two neurotypes can trigger this differently. The autistic part may feel unsafe amid sudden change, while the ADHD part may feel unsafe amid monotony. Your nervous system can swing between activation and shutdown more often, working hard to find a sense of safety that keeps moving.
Understanding this helps reframe what once felt like erratic behaviour. Your reactions are not random. They reflect a finely tuned system doing its best to protect you.
What does AuDHD look like in adults?
Because many adults grew up undiagnosed, AuDHD often hides behind years of coping and masking. Here are some common experiences.
Inconsistent energy and focus
You might hyperfocus intensely on something, then find ordinary tasks almost impossible. Your capacity can vary dramatically from day to day, which others may misread as unreliability.
Sensory and emotional intensity
Bright lights, noise, or crowded spaces may overwhelm you, while emotions can arrive suddenly and feel enormous. Holding both sensory and emotional intensity at once can be deeply tiring.
Exhaustion from masking
Many AuDHD adults learned to hide their natural responses to fit in. This masking can be effective, but it comes at a cost — chronic fatigue, anxiety, and a sense of disconnection from who you really are.
A history of feeling "different"
Perhaps you always sensed you didn't quite fit, without understanding why. Recognising AuDHD can finally give shape to that lifelong feeling.
How early experience shapes the AuDHD adult
Gabor Maté's work reminds us that we cannot separate a person from the environment that shaped them. Many AuDHD adults grew up in worlds that misunderstood their needs.
When a child's natural way of being is consistently met with confusion or correction, the nervous system learns to stay vigilant. Pat Ogden's Sensorimotor Psychotherapy highlights how these early patterns become held in the body, in posture, tension, and habitual responses to stress.
This means AuDHD in adulthood is rarely just a neurological story. It is also a relational and emotional one. The way you learned to survive often lives on in how your body responds today. From a psychodynamic perspective, these early experiences don't simply disappear. They shape how you relate to yourself, often outside your awareness. Bringing them into gentle view can be profoundly freeing.
A daseinsanalytical perspective: who are you beneath the labels?
Diagnostic labels can be clarifying. They can also feel reductive, as though they capture all of you. Daseinsanalysis invites a different question: not only what you are, but how you exist in the world and what your experience means to you. From this view, AuDHD is not only a set of challenges to manage. It is part of how you encounter life, often with depth, originality, and a particular way of noticing the world. You might gently ask yourself: What does my way of being allow me to see or create? What have I been hiding in order to feel accepted? These questions honour your experience rather than reducing it to symptoms. You may find my reflections in The courage to Be: authenticity and daseinsanalysis a helpful companion here.
Common misunderstandings about AuDHD
It helps to name a few patterns that often cause confusion, for AuDHD adults and those around them.
"You can't have both." Outdated thinking. Autism and ADHD frequently co-occur, and recognising both leads to better understanding and support.
"You're just inconsistent." What looks like inconsistency is often two valid neurotypes with competing needs.
"You don't seem autistic / you don't seem to have ADHD." Masking, and the way each neurotype can soften the other's presentation, can make AuDHD harder to spot.
"You should just try harder." The struggle is rarely about effort. It is about a nervous system navigating genuine, sometimes opposing, needs.
Letting go of these assumptions makes room for a kinder, more accurate self-understanding.
Living more gently with AuDHD
Understanding AuDHD is less about fixing yourself and more about working with who you are. A few principles can help.
Honour both sets of needs. Where you can, build in both structure and flexibility, rather than forcing yourself into one.
Notice your nervous system states. Learning when you feel activated, shut down, or settled helps you respond with care rather than judgment.
Reduce unnecessary masking. Finding spaces where you can be yourself, even small ones, helps ease the chronic exhaustion of pretending.
These shifts take time. Be patient with yourself as you learn a new, more compassionate way of relating to your own mind.
Quick recap and next steps
AuDHD describes the experience of being both autistic and having ADHD. In adults, this often creates an internal tension between a need for predictability and a need for novelty. Through the lens of Polyvagal Theory, somatic awareness, and a more reflective view of who you are, these contradictions begin to make sense, and self-criticism can soften into understanding.
If you recognise yourself here, you don't have to make sense of it alone. At Therapy with Michaela, we take a holistic, body-aware approach, drawing on Polyvagal-informed, somatic, and psychodynamic methods to help you understand your unique way of being and feel more settled in yourself. Reach out to explore therapy services and take a supportive next step.
For further reading, you may also find these articles helpful:
Frequently asked questions about autism and ADHD in adults
Can you have both autism and ADHD?
Yes. While professionals once believed the two could not co-occur, current research clearly recognises that autism and ADHD frequently overlap. Many autistic people also meet the criteria for ADHD, and this combination is increasingly described informally as AuDHD.
Why does AuDHD feel so contradictory?
AuDHD can feel contradictory because autism and ADHD often involve opposing needs. Autism may draw you towards routine and predictability, while ADHD pulls you towards novelty and stimulation. These competing needs exist within the same nervous system, which is why daily life can feel like an internal tug-of-war.
How is AuDHD diagnosed in adults?
AuDHD is identified through a comprehensive assessment by a qualified professional, usually a team of a Psychologist, Speech Pathologist and Psychiatrist, who explore your developmental history, current experiences, and the ways both autism and ADHD may present. Because masking and overlapping traits can complicate the picture, a thorough, unhurried evaluation is important rather than a quick or online assessment.
Why was my AuDHD missed when I was younger?
Many adults were missed because they learned to mask their natural responses, or because each neurotype softened the other's presentation. Old diagnostic criteria that autism and ADHD could not co-occur also meant clinicians often recognised only one, or neither, leaving many people to grow up sensing they were different without understanding why.