AuDHD describes adults who are both autistic and have ADHD. It often looks like an internal tug-of-war: craving routine yet bored by it, hyperfocusing then losing track, masking heavily, with late diagnosis common.
What AuDHD actually means
AuDHD is community shorthand for having both autism and ADHD at once. It is not a separate diagnosis. In the UK each condition is still assessed and diagnosed in its own right, and before the DSM-5 arrived in 2013 you could not formally be given both labels at all. So an adult living as AuDHD usually holds two diagnoses, or suspects one while waiting on the other. The charity Autistica and the NHS Right to Choose provider Psychiatry-UK both describe AuDHD as the combined lived experience of the two, rather than a third condition of its own.
The defining adult experience: pulling in two directions
The signature of AuDHD in adults is conflict between traits that work against each other. Autism reaches for routine, sameness and predictability. ADHD reaches for novelty, stimulation and spontaneity. The same person can therefore need structure and also wreck it. You build a careful system, then a new interest hijacks the week. You plan the day to the minute, then lose two hours to a side quest you cannot stop. It can feel like one foot on the accelerator and one on the brake.
How it shows up day to day
Common patterns adults report include:
- Meticulous plans derailed by distraction - the system is sound, the follow-through is not.
- Hyperfocus alongside stalled basics - hours on a passion project, while laundry, admin and emails pile up.
- Sensory differences and executive-function struggles - starting, switching and finishing tasks are all hard work.
- Emotional dysregulation and rejection sensitivity - small knocks land heavily.
- Sleep problems and the exhaustion that follows.
The local NHS service at Nottinghamshire Healthcare notes that sensory differences, executive function, emotional regulation and sleep are shared ground between the two conditions, which is part of why they so often travel together.
Why it gets missed
Co-occurrence is far more common than once assumed. Autistica reports that around 28% of autistic children also meet ADHD criteria and about 21% of children with ADHD are also autistic; adult figures are less certain, but the overlap is large. Despite this, many adults reach their thirties or forties undiagnosed. The reasons are practical: the two conditions share symptoms, so one can mask the other, and a lifetime of social masking - more often described in women and in those diagnosed late - hides the difficulties from clinicians, teachers and employers. The cost of that camouflage is real, and frequently shows up as anxiety, burnout and low self-esteem before anyone names the cause.
Getting assessed and supported in the UK
Because autism and ADHD are assessed separately, you usually have to raise both with your GP and ask to be referred for each. In England you can use NHS Right to Choose to pick an approved provider and shorten the wait. The thing to hold onto is that support works best when it addresses both neurotypes at once - strategies aimed only at the autism, or only at the ADHD, tend to fall down at the exact point where the two pull against each other.
Where the law comes from
This page is general information, not clinical or legal advice.