Sleep disorders
We all experience the occasional restless night. However, a sleep disorder involves chronic, ongoing difficulties with falling asleep, staying asleep, or waking up. For the general population, sleep issues are often tied to temporary stress. But for the neurodivergent community, disordered sleep is usually a core biological feature of how their brains and nervous systems are wired.
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Common sleep disorders include:
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Insomnia: the inability to fall or stay asleep.
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Delayed sleep phase syndrome (DSPS): a biological circadian rhythm that is shifted several hours later than the neurotypical norm (the extreme 'night owl').
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Restless legs syndrome (RLS): an uncontrollable, uncomfortable urge to move the legs, particularly at night.
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Sleep apnea: breathing that stops and starts during sleep.
The link to ADHD and autism
Sleep problems are incredibly prevalent in the neurodivergent community. Research shows that up to 75% of children and adults with ADHD experience significant sleep difficulties. The link is so strong that some medical professionals argue sleep disruption isn't just a comorbidity of ADHD, but a core symptom of it. Here are some reasons why sleep can be so difficult for ADHD and autistic brains:
Delayed circadian rhythms
Many people with ADHD have a natural biological clock that doesn't release melatonin (the sleep hormone) until much later in the night. Society demands they wake up at 7AM, but their biology refuses to let them sleep until 2AM.
The racing brain
While the body may be exhausted, the ADHD brain often wakes up the moment the lights go out. Without the distractions of the day, racing thoughts, anxieties and hyper-fixations take over.
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Sensory overload (autism)
For an autistic individual, a room is rarely 'just quiet'. The humming of a refrigerator, the texture of the bedsheets or a sliver of street light can be physically painful and entirely prevent the nervous system from relaxing.
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Dopamine seeking
Because the ADHD brain is constantly starved for dopamine, it will fight sleep to seek out stimulation: whether that is scrolling on a phone, playing video games or starting a new project at midnight.
What it looks like in everyday life
Neurodivergent sleep struggles often look like behavioural issues, which leads to immense frustration for parents, partners and the individuals themselves:
"Revenge bedtime procrastination"
Staying up incredibly late doing low-effort, highly stimulating activities (like scrolling social media) because the person feels they had no control or free time during the day.
The 'second wind'
Feeling exhausted all day, but suddenly experiencing a massive surge of energy, creativity and focus at 10PM.
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Severe sleep inertia
Waking up isn't just feeling groggy; it is a painful, prolonged physical struggle. People with ADHD may set ten alarms and sleep through all of them, arriving late to school or work and carrying deep shame because of it.
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Masking as worse ADHD
Chronic sleep deprivation mimics and magnifies every single ADHD trait. A person might not need a higher dose of ADHD medication; they might just be running on three hours of sleep.
Coping strategies and support
Standard 'sleep hygiene' advice (like 'just read a book' or 'turn off your screens an hour before bed') is notoriously ineffective for ADHD brains, as under-stimulation often causes the brain to panic and race faster.
Occupy the 'monkey brain'
Instead of forcing total silence, give the brain something mildly interesting to focus on so it stops generating anxious thoughts. Listening to an audiobook you’ve already read, putting on a familiar podcast on a sleep timer or using 'brown noise' can safely occupy the brain's background processing while the body falls asleep.
Sensory regulation first
Address the physical environment. Use blackout curtains, keep the room heavily cooled and utilise deep pressure therapy (like a weighted blanket) to signal to the nervous system that it is safe to shut down.
Strategic medication and supplements
Many neurodivergent individuals have success using over-the-counter melatonin, as their bodies do not produce enough of it naturally at the right time. Additionally, working with a psychiatrist is vital; paradoxically, some people with ADHD sleep better taking a very small dose of stimulant medication before bed, as it finally quiets their racing thoughts.
Shift the routine, not just the bedtime
ADHD brains struggle with transitions. Moving from the high stimulation of the living room straight to a dark bedroom feels like hitting a brick wall. Create a 'buffer zone' of 45 minutes where lighting is dimmed and activities are low-demand to ease the transition.
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Timely detection matters
When a sleep disorder is ignored, the compounding effects of chronic exhaustion are devastating. Sleep deprivation destroys emotional regulation, acting as a massive trigger for rejection sensitive dysphoria (RSD), severe depression and anxiety. Even more tragically, desperation for sleep or the need to force oneself awake drives many undiagnosed individuals toward self-medication, skyrocketing the risk of substance addiction and suicidal ideation.
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At the Matthew Lock ADHD Charity, we know that sleep is not a luxury; it is a critical medical need. Identifying and supporting neurodivergent sleep patterns is essential to protecting mental health and saving lives.
Lived experience: ADHD, autism and sleep
"Telling me to 'just put my phone away and close my eyes' is a nightmare. If I don't have a podcast or a video playing in the background, my brain creates its own noise. I will lie in the dark for three hours agonising over a conversation I had five years ago or mentally planning a business I’m never going to start. I need the background noise to act as a babysitter for my thoughts so my body can finally sleep."
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"I call it 'Revenge Bedtime Procrastination.' I spend my entire day at work masking my ADHD, trying to act normal, and doing things I don't want to do. By the time 11PM rolls around, it’s the only time nobody is demanding anything from me. So I stay up until 3AM reading about random historical facts just to feel like I own a piece of my own life, even though I know it will ruin tomorrow."
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"The hardest part about having Delayed Sleep Phase Syndrome is the moral judgment from society. Because my natural sleep cycle is 3AM to 11AM, I am constantly called lazy. If I worked a night shift, I’d be a perfect employee. But because the world operates at 8AM, I am constantly exhausted, chronically late, and made to feel like a failure."
Source references
Sleep Foundation
Fact supported: Sleep problems are incredibly common in individuals with ADHD, with studies indicating that 25% to 50% of people with ADHD experience sleep issues, ranging from insomnia to delayed sleep phase syndrome and restless legs syndrome.
Reference detail:
Sleep Foundation. (n.d.). ADHD and Sleep.
CHADD (Children and Adults with Attention-Deficit/Hyperactivity Disorder)
Fact supported: Up to 75% of adults with ADHD report chronic sleep difficulties. The lack of sleep severely exacerbates daytime ADHD symptoms, making executive dysfunction, memory issues and emotional dysregulation significantly worse.
Reference detail:
CHADD National Resource Center on ADHD. (n.d.). ADHD and Sleep Disorders.
National Institutes of Health (NIH) / PubMed
Fact supported: Delayed sleep-wake phase disorder (DSWPD) is highly prevalent in the ADHD population, linked to an intrinsic delay in the biological circadian rhythm and delayed melatonin onset.
Reference detail:
Coogan, A. N., & McGowan, N. M. (2017). "A systematic review of circadian function, chronotype and sleep in Attention Deficit Hyperactivity Disorder." Psychological Medicine, 47(6), 1040-1056.
Autism Speaks
Fact supported: Over half of children and adults on the autism spectrum struggle with chronic sleep issues. Atypical melatonin production and severe sensory processing sensitivities (being unable to filter out environmental stimuli at night) are primary medical drivers for this comorbidity.
Reference detail:
Autism Speaks. (n.d.). Sleep and Autism.