AuDHD means having both autism and ADHD at the same time. It is not a separate third condition, and it is not a ‘milder’ version of either. It is one nervous system running two neurotypes whose instincts often pull in opposite directions, which is exactly why it feels so contradictory to live with.
I am Sabbir Ahmed, a UKCP-registered psychotherapist (reg. no: 2011164676) and EMCC-accredited coach with 20+ years of work across the NHS, private and community settings. I trained at the Tavistock and Portman NHS Foundation Trust and studied CBT at King’s College London. I am also the father of an autistic son, so the way neurodivergence shows up at home, not only in the consulting room, is something I have watched closely for years. This article is educational and does not create a therapist-client relationship, but I hope it makes something confusing feel a little clearer.
What does AuDHD actually mean?
AuDHD is the informal term for autism and ADHD co-occurring in the same person. Autism and ADHD are neurodivergences, not diseases to be cured. AuDHD simply describes carrying both profiles together, each shaping how you think, focus, feel and relate.
For a long time this combination was officially invisible. Until 2013, the diagnostic manuals treated autism as a reason you could not also be diagnosed with ADHD, so clinicians were trained to pick one. That changed only when the DSM-5 removed autism as an exclusion criterion for ADHD, described by an expert consensus in BMC Medicine as “a fundamental change from DSM-IV”. A whole generation of adults grew up under the older rulebook, which is a large part of why AuDHD went unrecognised for so long.
The two also overlap heavily, and unevenly. The same BMC Medicine review found ADHD traits are common in autistic people, with clinical studies of children reporting co-occurrence as high as 53 to 78 percent and community samples nearer 28 to 31 percent, while around a fifth of people identified through ADHD show autistic traits. In other words, if you have one, the odds of the other being present are far from small.
Why do autism and ADHD traits pull in opposite directions?
These profiles often pull in opposite directions because the two profiles often want opposite things at the same moment. An autistic drive toward sameness, routine and deep predictability sits alongside an ADHD drive toward novelty, stimulation and change, so the same person can crave a stable routine and feel suffocated by it within the same afternoon.
You see it in attention. The autistic capacity for intense, sustained focus can collide with ADHD distractibility, so you might hyperfocus for six hours on something that grips you, then be unable to start an email that takes ten minutes. You see it in energy: the ADHD engine reaches for input and movement, while the autistic system has a lower tolerance for sensory load and needs quiet to recover. That internal tug-of-war is tiring in a way that is hard to explain to anyone who experiences their neurotype as a single, consistent setting.
None of this is a character flaw or a lack of willpower. It is two regulation systems with different defaults, sharing one body. Understanding that pattern is often the first genuine relief a client feels, because it reframes years of “why can’t I just be consistent” as a predictable feature of how AuDHD works.
| Dimension | Autism-led tendency | ADHD-led tendency | AuDHD overlap |
|---|---|---|---|
| Routine and novelty | Seeks sameness and predictable structure | Seeks novelty, variety and change | Needs routine to feel safe, yet gets restless and bored inside it |
| Focus | Deep, sustained focus on a chosen interest | Shifting attention, easily pulled off task | Intense hyperfocus on some things, near-impossible starts on others |
| Social style | Prefers clear rules, direct meaning, less small talk | Spontaneous, talkative, interrupts, blurts | Wants connection but finds the mixed demands draining and confusing |
| Sensory experience | Often over-sensitive; seeks calm, low-stimulus settings | Often seeks stimulation to stay alert and engaged | Craves stimulation and is overwhelmed by it, sometimes in one moment |
| Energy and recovery | Recovers through quiet, low-demand downtime | Recovers through activity, interest and movement | Both drives compete, raising the risk of exhaustion and burnout |
How does AuDHD show up in late-diagnosed adults?
In late-diagnosed adults, AuDHD usually shows up as a lifetime of contradiction that never fit a single label. People describe being organised and chaotic, sociable and drained, capable and stuck, and being quietly baffled that no explanation held all of it together at once.
Many have spent decades masking, building elaborate systems to appear consistent, then crashing when the effort becomes unsustainable. A common thread is a boom-and-bust rhythm: periods of high output driven by interest and adrenaline, followed by shutdown, withdrawal and a sense of running on empty. It often surfaces alongside long-standing anxiety, low self-esteem, or a diagnosis of one condition, frequently ADHD, that only ever explained half the picture.
The scale of the missed overlap in adults is striking. Reporting in National Geographic notes that roughly 45 percent of adults with ADHD show significant autistic traits, yet only about 1.7 percent have a formal co-occurring autism diagnosis. That gap between traits and diagnosis is the lived reality of AuDHD for a huge number of adults who sense there is more to their profile than the one label they were given.
Why is AuDHD so often missed?
AuDHD is missed for three reasons stacked on top of each other. These include an old diagnostic rule that split the two apart (clinicians were barred from diagnosing individuals with both conditions until the arrival of the DSM-5 in May 2013), assessments that tend to look for one condition at a time, and traits that mask or cancel each other out so neither profile looks textbook.
The internal conflict itself hides the picture. ADHD spontaneity can soften the appearance of autistic rigidity, while autistic structure can mask ADHD chaos, so a person presents as “not quite either” and slips through. Add the long-standing bias that these are childhood, and stereotyped as ‘boyish’ conditions, and it becomes clear why so many adults, particularly women (ADHD and autism are underdiagnosed in women relative to their prevalence) and anyone who learned to mask well, reach midlife without either label.
The system itself is under enormous strain, which lengthens every wait. As of December 2024, the National Autistic Society reported 212,964 people waiting for an autism assessment in England, with 90 percent waiting longer than the 13-week standard that NICE recommends. ADHD, which the NHS England ADHD Taskforce estimates affects an estimated 2 to 3 percent of adults, carries adult assessment waits of up to eight or more years in some areas. Those waits are a big part of why routes such as Right to Choose, which lets eligible patients choose a qualified NHS-funded provider, matter so much, and why the recent surge in late adult diagnoses has been so long in coming.
How does support actually hold both profiles at once?
Good AuDHD support holds both profiles at the same time instead of treating one and ignoring the other. It works with the whole nervous system: the routine you need and the novelty you crave, the hyperfocus and the shutdown, rather than optimising for autism at ADHD’s expense or the reverse.
Clinical guidance points the same way. NICE guideline NG87 advises clinicians to “offer the same medication choices to people with ADHD and anxiety disorder, tic disorder or autism spectrum disorder as other people with ADHD”. In plain terms, co-existing autism should not cause someone’s ADHD to be under-treated, and the two are meant to be held together, not played off against each other.
As a UKCP psychotherapist, my work is not the diagnostic assessment itself, and I want to be clear about that boundary; therapy is not an autism or ADHD assessment, and I do not diagnose. What I do work with is everything that travels alongside an AuDHD profile, the co-occurring anxiety, the identity questions that follow a late realisation, the executive-function strain, and the exhaustion that can tip into autistic burnout. The National Autistic Society describes that burnout as a state of pervasive, long-term exhaustion, loss of function and reduced tolerance to stimulus, typically lasting three months or more. It is not laziness or ordinary tiredness, and support has to treat it as the serious, recognised state it is. Client examples are anonymised or composite. If you want a fuller picture of that pattern, my guide to autistic burnout in adults goes deeper.
In practice, that can mean building routines flexible enough to satisfy the ADHD need for novelty, protecting sensory recovery so hyperfocus does not end in collapse, and doing the slower work of grief and self-acceptance that a late realisation often brings. You can read more about the two neurotypes on my autism and neurodiversity therapy and adult ADHD therapy pages, and about why an affirming approach helps in my article about the benefits of neurodiverse therapy in everyday life.
Next steps
If reading this has put words to something you have carried for years, you do not have to make sense of it alone. I offer a free 20-minute initial consultation where we can talk about what you are noticing and whether working together would help. You can book an initial consultation here.
If you’re in crisis right now, call Samaritans free, 24/7, on 116 123, or call 999 in an emergency. This is planned support, not crisis care.
Reviewed by Sabbir Ahmed, UKCP-registered psychotherapist (Reg. No. 2011164676). This article is educational and does not create a therapist-client relationship.
Ready to talk it through?
If anything here resonated, you don’t have to work through it alone. Book a free, no-obligation 20-minute discovery call with Sabbir Ahmed, UKCP-registered psychotherapist and EMCC-accredited coach, to talk through where you are and find the right way forward.
Frequently asked questions about AuDHD in adults
Is AuDHD a real diagnosis?
AuDHD is not a standalone diagnosis in itself. It is a widely used term for having both autism and ADHD, each of which is a recognised neurotype. Since 2013 the two have been able to be formally diagnosed together, which was not possible before.
Can you be autistic and ADHD at the same time?
Yes. Autism and ADHD frequently co-occur. Clinical studies find ADHD traits in a majority of autistic people, and autistic traits in a meaningful share of people with ADHD, so the combination is common rather than rare.
Why do my autism and ADHD traits seem to contradict each other?
Because the two profiles often want opposite things, such as routine versus novelty, or deep focus versus constant switching. That internal pull is a normal feature of AuDHD, not a sign that something is wrong with you.
Why was my AuDHD missed until adulthood?
Older diagnostic rules in previous versions of the DSM split the two conditions apart, assessments often looked for one at a time, and the traits can mask each other. Long assessment waits and the assumption that these are childhood conditions add to the delay.
Can therapy diagnose my AuDHD?
No. Therapy is not an autism or ADHD assessment, and I do not diagnose. Therapy supports the anxiety, burnout, identity and executive-function strain that come with the profile, and can run alongside a formal assessment pathway.
What is the difference between ADHD coaching and therapy for AuDHD?
Coaching tends to focus on structure, systems and forward action, while therapy works with emotion, identity and burnout. Many AuDHD adults benefit from both. My guide to ADHD coaching versus therapy explains which fits which need.
How do I get an AuDHD assessment on the NHS?
You would usually start with your GP, who can refer you for autism and ADHD assessments. Waits are long, so it is worth asking about Right to Choose. My adult ADHD support guide for London walks through the routes.
References
- American Psychiatric Association. (2013). Diagnostic and Statistical Manual of Mental Disorders (5th ed.). American Psychiatric Publishing. The DSM-5, published in May 2013, removed autism as an exclusion criterion for an ADHD diagnosis, allowing the two to be formally diagnosed together for the first time. doi.org/10.1176/appi.books.9780890425596
- Young, S., Hollingdale, J., Absoud, M., et al. (2020). Guidance for identification and treatment of individuals with attention deficit/hyperactivity disorder and autism spectrum disorder based upon expert consensus. BMC Medicine, 18, 146. doi.org/10.1186/s12916-020-01585-y
- National Institute for Health and Care Excellence. (2018, updated 2019). Attention deficit hyperactivity disorder: diagnosis and management (NG87). nice.org.uk/guidance/ng87
- National Autistic Society. (2025). Autism assessment waiting times (figures to December 2024). autism.org.uk
- National Autistic Society. Autistic burnout. autism.org.uk