Short answer: AuDHD is the community word for being autistic and ADHD at the same time. It is not a separate clinical diagnosis; it is two diagnoses in one person, which has only been officially allowed since 2013. Roughly one in four autistic people also meet the criteria for ADHD, and many only find out in adulthood.
Nobody told you that you could be both
Most adults who end up searching for this word were never told it was possible. You got one diagnosis, or none, and the other half of your life was filed under anxious, lazy, intense, sensitive, or "just how you are." Nobody said you could be autistic and ADHD at the same time, so a lot of people find out sideways: from a child's assessment, a comment thread, a late-night search, or a friend saying "wait, that is me too."
If you have ever walked out of an appointment with one diagnosis and felt it explained about half of your life, this page is for you. It covers what AuDHD actually means, why the two conditions were kept apart for so long, how common the overlap is, what it feels like from the inside, and what to do if you are reading this and nodding.
What does AuDHD mean?
AuDHD is shorthand for autism plus ADHD: one person who meets the criteria for both. You will not find the word in a diagnostic manual. A clinician writes two diagnoses, "autism spectrum disorder" and "attention-deficit/hyperactivity disorder," and the community shortened that into one word because living with both is its own experience, not two experiences stacked on top of each other.
The reason the word feels new is that the combination was officially impossible for a long time. Under the DSM-IV, the manual used in the United States from 1994 to 2013, an autism diagnosis was an exclusion criterion for ADHD. If you were autistic, you could not also be diagnosed with ADHD, whatever your attention and impulsivity looked like. The DSM-5 removed that rule in 2013 and allowed the dual diagnosis for the first time (Leitner, 2014). That is why so many adults who were assessed as children got one label, and why the second one often arrives decades later.
How common is it to be autistic and ADHD?
Common enough that it should have been the first question, not the last. A meta-analysis of 96 studies published in The Lancet Psychiatry found that 28 percent of autistic people also have a confirmed ADHD diagnosis, the highest of any co-occurring condition the authors looked at, ahead of anxiety and depression (Lai et al., 2019). In clinical samples the figure runs higher, and most of the underlying studies were done on children, so the number for adults who were never assessed for the second condition is almost certainly an undercount.
The overlap is not an accident of diagnosis. Genetic research over the past decade shows strong shared genetic ground between ADHD and autism, which is one of the reasons the old exclusion rule was dropped (Thapar, 2018). And when researchers compare the two groups directly on executive function, the skills that run planning, working memory, flexibility and starting tasks, they find the same profile in both. A 2023 meta-analysis of 58 direct-comparison studies found no difference in executive function between autistic and ADHD participants (Townes et al., 2023). From the outside, the two conditions can look alike. From the inside, having both is a different thing entirely.
Why one diagnosis only ever explained half of you
Here is the part the clinic rarely explains. Autism and ADHD pull in opposite directions, and when they share a brain they can partly hide each other.
The autistic half wants sameness, routine, depth, and a predictable room. The ADHD half wants novelty, stimulation, speed, and a reason to leave the room. On paper, each one makes the other look milder. The ADHD looks less severe because the autistic need for structure holds some of it in place. The autism looks less severe because the ADHD restlessness reads as sociable and spontaneous. Assessors see a muted version of each and decide neither is the whole story, so you get the one that happened to be louder that year.
Masking makes it worse. You can mask one neurotype so carefully that you do not notice the other one running loose. One reader put it exactly: "I never even considered those things might be ADHD masking. I'm always so consciously masking my autism." Another, diagnosed autistic only, said the opposite: "even though I was only diagnosed with autism, I do more ADHD masking." When all your effort goes into hiding one thing, the second thing gets filed under personality.
That is why the second diagnosis so often lands as relief rather than shock. It is the missing half of a sentence you have been trying to finish for years.
What AuDHD feels like from the inside: the push and the pull
The clearest way to describe AuDHD is not a symptom list. It is a set of contradictions that both feel true at once. On our pages we draw it as two cats: Coffee, the autistic half, and Mango, the ADHD half. They live in the same house and want different things.
You crave routine and then break it. Coffee builds the perfect morning. Mango is bored of it by Thursday. You end up with a routine you need and cannot keep, and a guilt loop about why.
You overprepare and still forget the basics. You research the restaurant, the menu, the parking, and the route, then leave your wallet on the counter.
You are all in or completely absent. One reader described it as "all in or completely absent, and it has never once had access to the gear in between." Hyperfocus for nine hours, then nothing for a week, and the switch happens without asking you.
You are overstimulated and understimulated in the same hour. The cafe is too loud and too bright, and you are also restless because nothing in it is interesting enough.
You mask socially and then crash. You get through the event, you were charming, people said so, and you need two days in a dark room to pay for it.
You are "too much" in some rooms and "too quiet" in others, and you have never worked out which one is the real you. Both are.
We see this every week. Across our family of pages, including AuDHD Feed (@audhd_feed), ADHD Today (@adhd_today) and Autism Feed (@autism_feed) and reaching more than two million followers, the most common comment under any post about being both is from someone who already has one diagnosis and still feels that something is unexplained. The pattern that comes up most: a person diagnosed with ADHD who cannot work out why their brain is so regimented, why they need order and sameness, when everything they were told about ADHD was chaos. Or an autistic adult who cannot understand why the routine they built keeps collapsing. One label fit, and it still left a gap. For a lot of those people, including many who were diagnosed years ago, AuDHD is a completely new discovery, and it is the first explanation that covers the whole picture.
None of these is a flaw in the autism or a flaw in the ADHD. They are what happens when the two meet. The push and pull is the condition.
If you are already nodding, The AuDHD Curiosity Workbook was made for exactly this stage: a place to write down your own patterns before anyone else names them, with no checklist and no clinical language.
The AuDHD Curiosity Workbook (ours)
52 pages of reflection prompts and pattern mapping to explore your ADHD and autistic traits and the push-pull between them. Not a diagnosis, a way to understand yourself.
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How people find out they are AuDHD
Almost nobody finds out in the order the textbooks assume. These are the routes we hear about most, and the comments under our posts are full of them.
Through a child's assessment. This is the single most common story on our pages. A parent sits in on their child's autism or ADHD evaluation, hears the criteria read out loud, and recognizes themselves line by line. "I found out I was while my son was being diagnosed too. I always knew I had ADHD. I just didn't know I had autism too." Another reader was diagnosed at 54 after her child's assessment. It runs in families, and the children are being assessed in a world that has finally agreed both can exist together.
Through burnout. The masks hold for years, then a job, a baby, a move, or perimenopause takes the energy that was holding them up, and both conditions become visible at once. If you have been told you have anxiety and depression three times and the treatment never quite lands, this route is worth considering. One reader: "I finally had to quit my stressful job before having a meltdown. Or maybe this is a meltdown."
Through the second diagnosis arriving late. You were diagnosed with one in childhood or your twenties, built a life around it, and then something kept not adding up. "Finding out I had ASD just two years ago was life changing. It answered a lot of questions." The gap between the two diagnoses in adults is often ten to thirty years.
Through a post. This is how the word AuDHD spread. It was not a campaign. It was autistic and ADHD adults describing their lives in public and other people saying "that is me."
Finding out is rarely the end of anything. It is usually the first time the whole of you has had a name.
Is AuDHD a real diagnosis?
Two kinds of pushback show up every time we post about this, and both deserve a straight answer.
"AuDHD isn't a real thing." The word is not in the DSM-5 or the ICD-11, and nobody claims it is. What is in those manuals, since 2013, is permission to diagnose autism and ADHD in the same person. AuDHD is simply the community's name for that. If you want the clinical phrasing, it is "autism spectrum disorder with co-occurring ADHD," and the 28 percent figure above is from the medical literature, not from Instagram.
"ADHD and autism aren't opposites, they share traits." Partly right, and it is a fair correction. The executive function research shows the two conditions overlap heavily, which is why they get confused for each other in the first place. The push-pull we describe is not a claim that the conditions are polar opposites. It is a description of what it feels like when the sameness-seeking side of autism and the novelty-seeking side of ADHD both live in one nervous system. The traits overlap; the needs often conflict.
A third thing comes up, especially from women: "it isn't autism, it is something else being mislabeled." Misdiagnosis runs in both directions. AuDHD women are routinely labeled with anxiety, depression, or a personality disorder for years before anyone considers a developmental explanation. The answer to that is a proper assessment by someone who understands both conditions in adults, not a shorter list of possible answers.
What to do if this sounds like you
You do not need to do anything today. Recognition is allowed to be its own step.
When you are ready, the next steps are small. Read 7 signs you might be AuDHD, which goes through the contradictions above in more detail. If you are a woman or were raised as one, read AuDHD in women, and why it gets missed for decades, because the pattern of being missed is different and the late-diagnosis wave is mostly women. Write your own patterns down before you talk to anyone, because assessors ask about childhood and you will not remember under pressure. If you want a structured version of that, The AuDHD Curiosity Workbook is the gentlest place to start, and the Everything AuDHD Bundle is the full set for when you want more than one.
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And if you were handed one diagnosis years ago and it only explained half of you, you were not wrong about the other half.
This page is information, not a diagnosis. If you think you may be autistic, ADHD, or both, talk to a clinician who assesses adults for both conditions.
Frequently asked questions
What is AuDHD?
AuDHD is the community term for being autistic and having ADHD at the same time. It is not a separate diagnosis; it describes one person who meets the criteria for both autism spectrum disorder and attention-deficit/hyperactivity disorder. The word came from the autistic and ADHD community and is now widely used by clinicians informally.
Is AuDHD in the DSM-5?
No. The DSM-5 does not list AuDHD as a condition. What changed in 2013 is that the DSM-5 removed the rule that stopped clinicians from diagnosing ADHD in someone who was already diagnosed autistic. So the two diagnoses can now be given together, and AuDHD is the shorthand for that combination.
Can you be autistic and have ADHD at the same time?
Yes. Since 2013 both can be formally diagnosed in the same person. Research published in The Lancet Psychiatry estimates that about 28 percent of autistic people also have ADHD, and the two conditions share a large part of their genetic background.
What is the difference between AuDHD and ADHD?
ADHD on its own is mainly about attention regulation, impulsivity and restlessness. AuDHD adds the autistic side: a need for routine and predictability, sensory sensitivity, social masking, and deep interests. The two sides often conflict, so AuDHD people describe craving structure and breaking it, or being overstimulated and bored at the same time, in a way that ADHD alone does not usually produce.
Why was I only diagnosed with one?
Three reasons. Before 2013 clinicians were not allowed to diagnose both. Each condition can make the other look milder on paper, so assessors often see a muted version of each. And most adults learn to mask one neurotype so thoroughly that the other one gets mistaken for personality. The second diagnosis often arrives ten to thirty years after the first.
What are the signs of AuDHD in adults?
The clearest signs are contradictions that both feel true: needing routine and breaking it, overpreparing and forgetting basics, hyperfocus followed by total shutdown, being overstimulated and understimulated in the same hour, masking well and crashing afterward, and feeling that one diagnosis only ever explained half of you. We cover these in detail in 7 signs you might be AuDHD.
How do adults get diagnosed with AuDHD?
Through a clinician who assesses adults for both autism and ADHD. In the United States that is usually a psychologist, neuropsychologist or psychiatrist. Ask directly whether they assess for both in the same evaluation, because many only assess for one. Bring written notes on childhood patterns and current contradictions; it makes the assessment far more accurate.
Is AuDHD more common in women?
It is not known to be more common in women, but it is missed in women far more often. Both the autism and the ADHD criteria were built on how boys present, and women tend to mask earlier and harder, so many AuDHD women are labeled with anxiety, depression or a personality disorder first and are only recognized in their thirties, forties or later.
Sources
Leitner Y. The co-occurrence of autism and attention deficit hyperactivity disorder in children: what do we know? Frontiers in Human Neuroscience, 2014. https://doi.org/10.3389/fnhum.2014.00268
Lai MC, Kassee C, Besney R, et al. Prevalence of co-occurring mental health diagnoses in the autism population: a systematic review and meta-analysis. The Lancet Psychiatry, 2019. https://doi.org/10.1016/S2215-0366(19)30289-5
Thapar A. Discoveries on the genetics of ADHD in the 21st century: new findings and their implications. American Journal of Psychiatry, 2018. https://doi.org/10.1176/appi.ajp.2018.18040383
Townes P, Liu C, Panesar P, et al. Do ASD and ADHD have distinct executive function deficits? A systematic review and meta-analysis of direct comparison studies. Journal of Attention Disorders, 2023. https://doi.org/10.1177/10870547231190494
Reader quotes are from public comments on the Autism Feed and ADHD Today Instagram pages, lightly trimmed and shared without usernames.