The ADHD Map
ADHD rarely shows up as one isolated problem.
Start from something you actually experience, in your own words. The map shows what it may connect to, what commonly appears alongside it, what may help and where to get support.
Starting from an experience
I can’t switch off
Thinking gets louder at bedtime, and sleep often arrives late.
Why your brain won’t switch off
01
What you’re experiencing
I can’t switch off
02
What it may connect to
Sleep difficulty, Working memory, A body clock that runs late, Hyperfocus, Inattention, Other reasons concentration slips
03
What may help, and where next
Closing the loops before bed, External cues, ADHD assessment in the UK
Start with these
The most useful connections first
What this most likely connects to
Concepts that describe the experience. None of this identifies what is happening for you.
A body clock that runs late (Our note)
Not sleepy at 11pm and fine at 1am may be a timing mismatch rather than an effort problem. Sleep difficulties are commonly reported alongside ADHD, but which kind you have is something to raise with a clinician — this reading is ours.
Inattention (Source)
NHS information describes restlessness and difficulty settling among the features of ADHD in adults. That is not the same as guidance saying ADHD causes insomnia.
Working memory (Our note)
Unwritten loops get rehearsed, which keeps them active. Our explanation of a common experience rather than a measured mechanism.
What may be worth trying now
Things people commonly find useful. Not treatment.
Closing the loops before bed (Tip)
Write the circling things down with a time attached, then step the last hour down. This is the change people most often report helping.
External cues (Tip)
An alarm set before the absorbing thing starts, because stopping from inside it is much harder.
What to understand next
Including the things that can look like this and are worth ruling out.
Sleep difficulty (Source)
Sleep problems are commonly associated with adult ADHD and are worth assessing. Whether your own difficult nights are a timing problem, a worry problem or something else is a question for a clinician, not for this page.
Other reasons concentration slips (Our note)
Anxiety, depression, insomnia, sleep apnoea, pain, caffeine and alcohol all produce the same night, and several are treatable.
Inattention (Source)
NHS information describes restlessness and difficulty settling among the features of ADHD in adults. That is not the same as guidance saying ADHD causes insomnia.
When professional support may be appropriate
Nothing here is a diagnosis. A qualified professional is the only route to one.
ADHD assessment in the UK (Our note)
Sleep problems are worth treating in their own right, without waiting for an ADHD answer.
Everything below is the same set of connections in full, grouped by the kind of relationship.
May connect to
A body clock that runs late
ADHD concept · Our note
Not sleepy at 11pm and fine at 1am may be a timing mismatch rather than an effort problem. Sleep difficulties are commonly reported alongside ADHD, but which kind you have is something to raise with a clinician — this reading is ours.
Sleep timing out of step with the schedule you have to keep, rather than an inability to relax.
Can look like
Other reasons concentration slips
Related pattern · Our note
Anxiety, depression, insomnia, sleep apnoea, pain, caffeine and alcohol all produce the same night, and several are treatable.
Poor sleep, stress, low mood, anxiety, pain, grief, some physical conditions and some medications all affect concentration. ADHD is one explanation among several.
Commonly described alongside
Sleep difficulty
Related pattern · Source
Sleep problems are commonly associated with adult ADHD and are worth assessing. Whether your own difficult nights are a timing problem, a worry problem or something else is a question for a clinician, not for this page.
Late nights, a mind that speeds up in the quiet, and mornings that cost more.
Why we say this — the evidence
- Supports the claim that
- That sleep problems are commonly reported by adults with ADHD — strongly on subjective measures and with some actigraphic differences — and that UK guidance includes reviewing sleep as part of ADHD care.
- Sources
- Sleep in adults with ADHD: systematic review and meta-analysis of subjective and objective studiesDíaz-Román A and colleagues · Systematic review or meta-analysis · International · Systematic reviews and meta-analysesNG87 recommendationsNational Institute for Health and Care Excellence · Clinical guideline · UK · UK clinical and official authorityADHD in adultsNHS · Authoritative health information · UK · UK clinical and official authority
- What this does not prove
- That ADHD causes insomnia. The same review found no significant polysomnographic differences, so objective sleep differences are not universal.
- Our confidence
- Reasonably supported · last checked September 2026
Inattention
ADHD concept · Source
NHS information describes restlessness and difficulty settling among the features of ADHD in adults. That is not the same as guidance saying ADHD causes insomnia.
The clinical term for difficulty sustaining attention, following through and organising — one of the core features described in ADHD guidance.
Why we say this — the evidence
- Supports the claim that
- That restlessness and difficulty settling are among the features NHS information describes for ADHD in adults.
- Source
- ADHD in adultsNHS · Authoritative health information · UK · UK clinical and official authority
- Our confidence
- Well established in guidance · last checked September 2026
Can contribute to
Hyperfocus
Related pattern · Our note
Intense absorption often ends at bedtime, which is the worst moment for it. “Hyperfocus” is a popular description, not a clinical term.
Informal language for absorbing attention that is hard to interrupt. Commonly described by people with ADHD, but it is not a diagnostic criterion and not evidence of ADHD by itself.
I can’t focus
Experience · Our note
Short sleep makes the next day’s attention worse, which makes the next night’s unfinished list longer.
You can concentrate for hours on some things and not at all on the thing that matters today.
Working memory
ADHD concept · Our note
Unwritten loops get rehearsed, which keeps them active. Our explanation of a common experience rather than a measured mechanism.
Holding a plan in mind while acting on it. Out of sight is often genuinely out of mind.
May help with
Closing the loops before bed
Strategy · Tip
Write the circling things down with a time attached, then step the last hour down. This is the change people most often report helping.
Writing circling things down with a time attached, and stepping the last hour down.
External cues
Strategy · Tip
An alarm set before the absorbing thing starts, because stopping from inside it is much harder.
Leaving the task visible and physical so it does not depend on remembering to remember.
Where to get support
ADHD assessment in the UK
Assessment and support · Our note
Sleep problems are worth treating in their own right, without waiting for an ADHD answer.
The three routes to an assessment, and how they differ in wait and cost.
Looking for an assessment?
Clinics you can look at
If you want to be assessed privately, we keep plain records of UK clinics: who they are, who they assess, how much they charge and what that price covers. No ratings, no rankings, and nobody pays to be listed.
- See the clinic records
Every clinic we have researched, listed alphabetically, with the facts we could source and the ones nobody publishes.
- Compare private assessment in the UK
What private assessment involves, what it costs and what to check before you pay.
- Work out which route fits you
NHS, Right to Choose or paying privately — a few questions, no account, nothing stored.
Nothing on this map is a diagnosis. See every source we use, and its limits.