ADHD and sleep: why the mind only wakes up in the evening

It is 11.40 pm. The children are asleep, the dishes are done, the phone is on the charger. All day you dragged yourself through meetings as if through fog — and now, just when you could finally go to bed, something switches on in your head. Suddenly you have an idea for reorganising the kitchen drawer. You remember an article you meant to read. You open it “just for a minute”. When you next look at the clock it is 2.10 am, and you are as awake as you would be at ten in the morning.

In the morning the alarm goes off three times. You arrive at work twenty minutes late, with a sentence you have known since secondary school: “If you went to bed earlier, you wouldn’t be so tired.” As if you didn’t know. As if you hadn’t tried.

For many people with ADHD, the evening is the only part of the day when their head works the way they want it to. For their sleep, that is bad news. In this post I will explain why, with ADHD, the mind often only wakes up in the evening, what research on the body clock says about it, why the usual sleep advice often falls short, and what you can try as soon as tonight.

It is not laziness and not a lack of discipline

First, something that needs saying clearly: if you have ADHD and find it hard to fall asleep and hard to get up, it is not a sign that you are lazy or not trying hard enough. It is a common part of a picture that researchers are describing in ever more detail.

ADHD is not rare. A large meta-analysis published in 2021 by Peige Song and colleagues estimates that about 2.6 per cent of adults have ADHD that has persisted from childhood, while about 6.8 per cent have symptoms of ADHD in adulthood. The difference between the two figures comes from how it was counted — but even the lower figure means a great many people. And for a large share of them, ADHD shows itself at night too.

The link is well researched even in children. A 2009 meta-analysis by Samuele Cortese and colleagues brought together studies that measured the sleep of children with ADHD with questionnaires and with objective measurements. Compared with their peers, children with ADHD had more difficulty falling asleep, more resistance at bedtime and more trouble waking in the morning. In adults, more recent reviews — for example the one by Denise Wynchank and colleagues from 2017 — find that insomnia is common in adults with ADHD and should always be checked during an assessment.

If you recognise yourself in this, then, you are not an exception. You are part of a pattern that has an explanation — and an explanation is the first step towards no longer blaming yourself.

A body clock that runs late

Each of us has a circadian rhythm — an internal clock that tells the body when it is time to be awake and when to sleep. One of its main signals is melatonin, a hormone the body starts releasing when it gets dark in the evening. As melatonin levels rise, we become sleepy.

Dutch researchers around the psychiatrist Sandra Kooij measured this clock directly in adults with ADHD. In a study published in 2010 by Mireille van Veen and colleagues, they found that in adults with ADHD and difficulty falling asleep, evening melatonin release began later than in people without these difficulties. Their internal clock was shifted — the body declared “night” later than the clock on the wall did.

In review articles, Kooij and Denise Bijlenga have suggested that a delayed circadian rhythm is, for many people with ADHD, part of the condition itself rather than merely a consequence of it. People with ADHD are also more often distinct “evening types”. This means that your wide-awake head at eleven at night is partly biology: your body is not yet telling you it is time to sleep.

Some caution is needed here: a delayed clock is not present in everyone with ADHD, and it is not the only reason for difficulties. But for those who have it, it explains something that used to look like stubbornness — why mornings are so hard even if you went to bed “on time”.

The evening is finally quiet

The body clock is only part of the story. The other part is psychological, and almost everyone living with ADHD knows it: the evening is the only time of day when nobody is asking anything of you.

The whole day was made of demands — deadlines, messages, conversations, errands you forgot and remembered at the last minute. For a person with ADHD, a day like this is often more tiring than it looks from the outside, because every task requires extra effort from the executive functions: planning, starting, keeping going. When everything finally settles in the evening, sleep feels almost like an injustice. At last you have time for yourself — why would you sleep through it?

In 2014 the researcher Floor Kroese and colleagues gave this phenomenon a name: bedtime procrastination. They described it as going to bed later than you yourself intend, without any external circumstances forcing you to. Later, the variant “revenge bedtime procrastination” spread online — when at night you take back the time the day took from you. That term is not a research one, but the description feels very close to many people.

With ADHD, bedtime procrastination is intertwined with two other things. The first is procrastination in general: moving from one activity to another is hard, especially if the new activity is boring, like brushing your teeth. The second is the experience of time — 11 pm and 1 am can feel very close together in the evening. More on this in Time blindness: why the clock works differently with ADHD.

A mind that will not switch off

The third layer is arousal. Many people with ADHD describe how their thoughts in the evening do not run in circles, as in classic rumination, but jump — from idea to idea, from plan to memory, from a song to a question you had never asked yourself. When you become absorbed in something, hyperfocus can kick in: hours disappear without you noticing.

A brain that is this active cannot simply switch over into sleep. Sleep does not come on command; it comes when the nervous system slows down enough. The mechanism is similar to the one I describe in Hyperarousal: why chronic insomnia is not a sleep problem but an arousal problem, except that with ADHD the arousal is often less anxious and more curious. If your evening thoughts circle mainly around worries, though, you may also find Overthinking at bedtime: why the mind starts the film just when it should be switching off helpful.

Some people with ADHD also describe physical restlessness: legs that will not settle, a need to move, tossing and turning in bed. Some studies also link ADHD with restless legs syndrome. This is worth mentioning to your doctor, because it is treated differently from insomnia.

Caffeine, screens and medication

People with ADHD often reach for caffeine during the day to sharpen up — coffee, energy drinks, cola. Caffeine stays in the body for several hours, so an afternoon coffee can still be lengthening the time it takes to fall asleep in the evening. Screens add their share: not only the light, but above all content designed to keep you hooked. For a mind that seeks stimulation, endless scrolling is an almost perfect magnet. More on this in Caffeine, alcohol, screens and sleep: everyday amplifiers of anxiety and Phone and screen addiction: habit or problem?

ADHD medication is a separate question. In some people, stimulants can lengthen the time it takes to fall asleep if they are still working in the evening. In others the opposite happens: when the mind is calmer during the day, the evening is more orderly too. How medication works for you, when to take it and whether anything needs changing is something to decide together with the doctor who prescribed it — not on your own. You will find a general explanation in ADHD medication: what it does and what it doesn’t. The same goes for melatonin: talk to your doctor about whether it makes sense for you.

A conversation at midnight

This is how an evening might sound in a home where one partner has ADHD (composed, not a real person):

“Are you coming to bed?”
“Yes, in a minute. I’m just finishing this.”
“You said that an hour ago.”
“I know. But now I’m finally into it. I couldn’t during the day.”
“You’ll be wrecked again tomorrow.”
“I know I will. I don’t think I know how to stop. It’s not that I don’t want to.”

This short dialogue says two things. First: the partner who is waiting is not being a nuisance — they are worried, and often lonely, too, on the evenings when the other stays up. Second: “I don’t know how to stop” is not an excuse. For a person with ADHD, stopping an activity that has finally gripped them is one of the hardest steps of the day.

In couples where one partner falls asleep at ten and the other at two, the difference in rhythm quickly becomes a difference in the relationship: less time together, less tenderness, more reproach. It helps if the couple can see this difference as something they solve together, not as proof that one of them doesn’t care.

Why the usual advice falls short

The advice of sleep hygiene is familiar: go to bed at the same time, avoid screens before sleep, no coffee in the afternoon, keep the bedroom dark and cool. This advice is not wrong. But with ADHD it often falls short, for two reasons.

The first reason: it assumes the problem lies in habits, not in the clock. If your body clock is delayed, going to bed earlier will not help you fall asleep — you will simply lie awake for longer. And lying in bed without sleeping, as we know from insomnia research, gradually strips the bed of its link with sleep.

The second reason: it demands exactly the skills that are hardest with ADHD. “Switch off your phone every evening at 10 pm” is an instruction that assumes you will remember at 10 pm, that you will be able to stop what you are doing, and that you won’t mind losing your only time for yourself. For many people with ADHD it is like being told to “just concentrate”.

Rather than rules, then, external supports help more: an alarm that rings not for sleep but for the start of winding down; lights that dim on their own; a phone that sleeps in another room at night. With a delayed body clock, though, the key is the morning, not the evening: light soon after getting up, and as consistent a wake-up time as possible, weekends included. If the difficulties drag on, the best-tested method for chronic insomnia is Cognitive behavioural therapy for insomnia (CBT-I), which can also be adapted for people with ADHD.

An exercise: the landing strip

The idea of this exercise is not to force sleep, but to build a bridge between day and night. A plane does not land by switching off its engines above the airport — it starts descending well before. Try it tonight.

1. Set an alarm for landing, not for sleep. An hour to an hour and a half before you would like to fall asleep, have an alarm go off labelled “landing”. It is not an order to go to bed, but a signal that the descent is beginning.
2. Put your thoughts down on paper. When the alarm goes, spend five minutes writing down everything circling in your head: ideas, errands, worries. Don’t organise them. The only aim is that your head no longer has to hold them — tomorrow you will find them there.
3. Swap the stimulation, don’t take it away. A mind with ADHD finds it hard to go from interesting to nothing. Instead of your phone, choose something interesting enough that also ends by itself: a chapter of a book, an audiobook with a timer, drawing, tidying a single drawer.
4. Put your phone away outside the bedroom. Not as a punishment, but because next to the bed it is too tempting. If you need it as an alarm clock, buy an ordinary alarm clock.
5. In the morning, go towards the light. As soon as possible after getting up, spend a few minutes in daylight, even if it is cloudy. This is part of the exercise, because morning light helps shift the body clock earlier — and with it the next evening.

Keep the exercise going for at least two weeks before judging whether it works. The body clock moves slowly. If it helps, you can track your sleep and how you feel with the Sleep diary tool, so you can see what is changing.

Where this explanation does not apply

Because the link between ADHD and sleep is so common, it is easy to overgeneralise it. So here are some limits.

Not every sleep problem is ADHD. People without ADHD can be evening types too — and a delayed sleep rhythm is common, for example, in teenagers, regardless of ADHD. Difficulty falling asleep also accompanies anxiety, depression, stress and many physical illnesses. If you notice most of what is described here in yourself, that is not a diagnosis. An ADHD diagnosis is made by a psychiatrist or clinical psychologist after a thorough assessment.

The reverse is also true: poor sleep can mimic ADHD. Long-term sleep deprivation brings distractibility, forgetfulness, irritability and restlessness — signs very similar to ADHD. In children it is known that breathing problems during sleep (for example snoring with pauses in breathing) can lead to attention difficulties during the day. That is why a good professional always asks about sleep when assessing ADHD.

Some problems belong with a doctor. If you snore heavily or someone tells you that you stop breathing at night, if your legs urge you to move at night, if you are so sleepy during the day that you nod off while driving, or if insomnia has lasted for months, consult your GP. These things need to be checked before you put them down to ADHD.

And also: not every evening person needs fixing. If your life allows you to go to bed late and get up late, and you feel well doing so, there is nothing you need to change. The problem is not the late hour. The problem is the gap between your body’s clock and the clock of the world you live in.

How we approach this in therapy

Psychotherapy will not change your body clock. But it can help with what accumulates around it. For many adults with ADHD that is shame — decades of remarks about being lazy, being late, having “not slept again”. When that shame is eased, it becomes easier to look for solutions that suit your rhythm, instead of fighting yourself.

In relational family therapy, the approach I am training in, we also look at how sleep is woven into relationships. Who in your family used to make sure everyone went to bed on time? How do you and your partner now negotiate your evenings? Is late evening the only time you can truly be on your own — and if so, why is there no such time during the day? Questions like these often show that bedtime procrastination is not only about the clock but also about a need that goes unheard during the day.

If sleep and ADHD are not the only theme, but exhaustion and a feeling that you are never “enough” join in, it is worth looking at the wider picture — going to bed earlier alone will not change it.

What to remember

• Difficulty falling asleep and getting up is common and well researched in ADHD — it is not a sign of laziness.
• For many people with ADHD, the body clock runs late: melatonin, and with it sleepiness, arrives later.
• The evening is often the only time without demands, so sleep gets put off — bedtime procrastination has a name and an explanation.
• The usual sleep advice helps only partly; external supports and morning light help more.
• Poor sleep can mimic ADHD, so talk to your doctor about long-standing difficulties, snoring or restless legs — decisions about medication and melatonin are your doctor’s.