ADHD Overstimulation: Why Noise, Lights and Crowds Can Feel Like Too Much

Short answer: Overstimulation, often called sensory overload, is the feeling that noise, light, crowds, touch or too many demands at once are more than you can take in. Sensory sensitivity isn’t one of the official ADHD symptoms,¹ but a 2025 review of 30 studies found people with ADHD report more sensory differences than people without ADHD, including greater sensitivity to sensory input.² Most of those studies were in children and only 9 of the 30 were judged at low risk of bias,² so the findings need some caution. Cutting down input, planning recovery time and looking after your sleep can make overload easier to manage, and a GP can help work out what’s behind it.

What does overstimulation feel like?

“Overstimulation” and “sensory overload” are everyday terms rather than diagnoses. People use them for moments when more is coming in than they can process — and it can build quickly.

You might notice that:

• sounds feel louder and harder to tune out — several conversations at once, a TV in the background, a busy café or an open-plan office
• bright or flickering lights and busy, cluttered spaces are hard to bear
• clothing tags, scratchy fabrics, being touched or strong smells feel intolerable
• your thinking goes foggy, and it’s hard to follow a conversation or make a decision
• you feel tense, irritable or teary, and want to get out — now
• you shut down, go quiet or zone out.

It isn’t only about the senses. Too many demands at once — three people asking you questions, notifications pinging while you cook dinner, a long to-do list — can trigger the same overwhelmed feeling.

Is sensory overload part of ADHD?

Not officially. Sensory sensitivity doesn’t appear in the official ADHD symptom lists.¹ But a number of studies suggest sensory differences are common in ADHD:

• A 2025 meta-analysis pooled 30 studies involving 5,374 people (23 studies in children and 7 in adults). People with ADHD reported more sensory differences than people without ADHD in all four areas measured: sensitivity to sensory input, avoiding it, not noticing it (“low registration”) and seeking it out. The differences were large.²
• A 2017 study of 116 adults with ADHD found that both over- and under-responsiveness to sensory input were common³ — so you might be bothered by some sensations and barely notice others.
• A 2018 study of 234 adults from the general population found that the more ADHD traits people had, the more often they reported sensory processing difficulties, across all the senses. It was the first study to show this in the general population, and the authors suggested sensory difficulties could be part of ADHD.⁴

The evidence has limits: most of the studies in the meta-analysis involved children, and just 9 of its 30 studies were rated as having a low risk of bias.² Even so, the review’s authors recommend that sensory processing be explored routinely when children and adults are assessed for ADHD.²

Women and sensory sensitivity

In the 2017 study, as many as 43% of women with ADHD reported being over- and/or under-sensitive to sensory input, compared with 22% of men.³ It’s a single study and the finding needs confirming, but it may be worth knowing if you’re a woman who has always found noise, light or textures hard to cope with. For more on how ADHD can show up in women, see undiagnosed ADHD in women.

ADHD, autism and sensory overload

Sensory overload is often talked about in relation to autism, and some features of autism overlap with ADHD.⁵ Two things are worth knowing:

• Sensory differences seem to be linked to ADHD in their own right. In the 2017 study, the sensory differences in adults with ADHD were linked to ADHD rather than to autistic symptoms.³
• The two conditions often occur together. Autism co-occurs with ADHD in 20–50% of cases,⁶ and ADHD is among the most common co-occurring diagnoses in autistic people.⁷

So sensory overload doesn’t, by itself, point to either condition. The Australian ADHD Guideline warns that a co-occurring condition can lead to ADHD being missed, or can itself be missed when ADHD symptoms are present.⁸ If you recognise yourself in descriptions of autism as well as ADHD, tell your GP — and see ADHD and autism (AuDHD).

Why does overstimulation happen?

Researchers don’t yet know exactly why sensory differences are more common in ADHD. A few factors may play a part.

Attention and filtering. ADHD involves difficulties with executive functions such as sustained attention and inhibitory control,⁶ and being easily distracted by unrelated things or thoughts is an official symptom.¹ One possibility is that when it’s harder to tune out background sights and sounds, more of them compete for your attention at once.

Emotions. Difficulties regulating emotions affect up to 40–50% of children with ADHD and are also common in adults.⁶ When feelings rise fast, a noisy or crowded situation can tip into frustration, tears or snapping at the people around you — see ADHD rage and anger.

Sleep. Studies report insomnia in 43–80% of adults with ADHD,⁹ and not getting enough sleep can impair attention, emotional regulation and how quickly you process information.¹⁰ A run of bad nights may leave you with less in reserve for a busy day.

What helps in the moment

When overload hits, the aim is to bring the input down and give yourself a chance to settle. Things to try:

• Step away. Go outside, to a quieter room, or even to the bathroom for a few minutes.
• Turn the input down. Noise-cancelling headphones, earplugs, sunglasses or a cap can take the edge off. Switch off the TV, music or notifications.
• Slow your breathing. Breathe in gently and make each out-breath a little longer than the in-breath.
• Do one thing at a time. Put decisions and conversations on hold until you’ve settled.
• Use something familiar. Some people find a repetitive movement or a favourite object calming — see ADHD stimming.
• Say what you need. A short script helps: “I’m overloaded — I need ten minutes, then I’ll be back.”

Reducing overload day to day

• Learn your patterns. Note when overload happens: the place, the time of day, how you slept and whether you’d eaten.
• Build in recovery time. Leave a gap after busy events, and avoid stacking social plans or errands back to back.
• Choose quieter times and places. Shop early or late, use click and collect, or ask for a table away from the speakers.
• Set up your spaces. Softer lighting, fewer notifications and a calm corner at home can lower the background load.
• Look after the basics. Prioritise sleep and regular meals.
• Ask about workplace adjustments. Options might include a desk away from foot traffic, wearing headphones, written instructions, flexible hours or some work from home. See ADHD at work.

When to get help

See your GP if overload is distressing, happening often, or limiting where you go, how you work or your relationships. It’s worth getting it checked rather than assuming it’s ADHD, because other conditions can produce similar experiences or occur alongside ADHD.

Anxiety is one to consider. Anxiety disorders are the most common mental health conditions in Australia, affecting 1 in 4 people at some stage, and difficulty concentrating is one of their symptoms.¹¹ Many people with ADHD also have anxiety or depression.¹² For anxiety, CBT and self-care such as exercise and cutting back on caffeine can help.¹¹ See ADHD and anxiety. Autism, as described above, is another. If you’re being assessed for ADHD, mention any sensory issues so they can be considered as part of the bigger picture.

Getting support: If overload is part of a bigger struggle with anxiety or low mood, Beyond Blue is available 24/7 on 1300 22 4636, and Lifeline offers 24-hour crisis support on 13 11 14. If someone is in crisis and needs help now, call 000.¹³ If anger is causing problems, your GP can help, and men can also call MensLine on 1300 78 99 78.¹⁴

Frequently asked questions

What is ADHD overstimulation?

It’s an everyday term for feeling overwhelmed when there’s too much going on, such as noise, bright lights, crowds or several demands at once. It isn’t an official ADHD symptom, but research suggests sensory differences are common in people with ADHD.

Is sensory overload a symptom of ADHD?

Not officially, because sensory sensitivity isn’t on the official ADHD symptom list. But a 2025 review of 30 studies found that people with ADHD report more sensory differences than people without ADHD. Most of the studies were in children, and the quality of the evidence varies.

Why are people with ADHD sensitive to noise?

Researchers don’t yet know exactly why. Differences in attention and in regulating emotions may play a part, and lack of sleep, which is common in ADHD, can make attention and emotional regulation harder.

Are women with ADHD more sensitive to sensory input?

One study of 116 adults with ADHD found that 43% of the women reported being over- or under-sensitive to sensory input, compared with 22% of the men. It’s a single study, so the finding needs confirming.

How do you calm down from overstimulation?

Step away from the source if you can, turn the input down with headphones, earplugs or sunglasses, slow your breathing, and give yourself time to settle before the next demand.

Should I see a GP about sensory overload?

Yes, if it’s distressing or limiting your life. A GP can help work out whether ADHD, anxiety, autism or something else is involved.

Next steps

Read ADHD and emotional dysregulation and ADHD symptoms in adults, or start with the free ADHD self-assessment.

This article is general information only and is not medical advice. Only a qualified health professional can diagnose ADHD. ADHD GP is a private telehealth clinic staffed by AHPRA-registered Australian GPs.

Book your ADHD assessment

References

1. American Psychiatric Association. What is ADHD?. 2025. www.psychiatry.org — ADHD is one of the most common mental disorders affecting children; symptoms must be present before age 12; an estimated 8.4% of children and 2.5% of adults have ADHD; listed symptoms include fidgeting, feeling restless (in adults), talking too much and forgetting daily tasks.
2. Jurek L, Duchier A, Gauld C, et al. Sensory Processing in Individuals With Attention-Deficit/Hyperactivity Disorder Compared With Control Populations: A Systematic Review and Meta-Analysis. Journal of the American Academy of Child and Adolescent Psychiatry. 2025. PubMed PMID 40250555 — Meta-analysis of 30 studies (5,374 participants, 7 studies in adults): people with ADHD reported more sensory sensitivity, avoiding, low registration and seeking than controls; only 9 studies were low risk of bias.
3. Bijlenga D, Tjon-Ka-Jie JYM, Schuijers F, et al. Atypical sensory profiles as core features of adult ADHD, irrespective of autistic symptoms. European Psychiatry. 2017. PubMed PMID 28371743 — In 116 adults with ADHD, 43% of women and 22% of men reported sensory hypo- and/or hypersensitivity; sensory differences were linked to ADHD rather than to autistic symptoms.
4. Panagiotidi M, Overton PG, Stafford T. The relationship between ADHD traits and sensory sensitivity in the general population. Comprehensive Psychiatry. 2018. PubMed PMID 29121555 — In 234 adults from the general population, more ADHD traits went with more frequent sensory processing difficulties across all the senses.
5. healthdirect (Australian Government). Autism. 2025. www.healthdirect.gov.au — The term neurodivergent also describes people with conditions such as dyslexia and ADHD; some features of autism overlap with ADHD.
6. Australian ADHD Professionals Association. About ADHD (Australian ADHD Guideline). 2022. adhdguideline.aadpa.com.au — ADHD affects 6–10% of Australian children and 2–6% of adults; heritability 70–80%; symptoms begin before 12 though diagnosis may come later; 60–86% persist into adulthood; inattentive presentation most prevalent; up to 80% of adults have another mental health condition, such as depressive, bipolar, anxiety or substance use disorders, and cluster B and C personality disorders are more common; describes executive-function difficulties (working memory, planning, sustained attention, inhibitory control), brain-maturation and dopamine differences.
7. 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. Lancet Psychiatry. 2019. PubMed PMID 31447415 — ADHD is among the most common co-occurring diagnoses in autistic people.
8. Australian ADHD Professionals Association. Australian ADHD Guideline — Chapter 2: diagnosis. 2022. adhdguideline.aadpa.com.au — Clinicians should know which conditions commonly co-occur with ADHD, as a co-occurring condition may result in a missed ADHD diagnosis, or a missed co-occurring condition when ADHD symptoms are present.
9. Wynchank D, Bijlenga D, Beekman AT, Kooij JJS, Penninx BW. Adult Attention-Deficit/Hyperactivity Disorder (ADHD) and Insomnia: an Update of the Literature. Current Psychiatry Reports. 2017. PubMed PMID 29086065 — Studies report insomnia in 43–80% of adults with ADHD.
10. Better Health Channel (Victorian Government). Sleep deprivation. 2014. www.betterhealth.vic.gov.au — Insufficient sleep can impair memory, attention, emotional regulation and the speed of processing information; even short-term sleep deprivation can impair these functions.
11. healthdirect (Australian Government). Anxiety. 2024. www.healthdirect.gov.au — Anxiety disorders are the most common mental health conditions in Australia, affecting 1 in 4 at some stage; symptoms include difficulty concentrating; CBT and self-care such as exercise and less caffeine can help.
12. healthdirect (Australian Government). Attention deficit hyperactivity disorder (ADHD). 2025. www.healthdirect.gov.au — ADHD is a neurodevelopmental condition that begins in early childhood; around 1 in 20 people in Australia has ADHD; it is partly genetic; an adult diagnosis requires evidence that symptoms began in childhood; learning difficulties can occur alongside it.
13. healthdirect (Australian Government). Mental health helplines. 2025. www.healthdirect.gov.au — Lifeline (13 11 14) offers 24-hour crisis support and Beyond Blue (1300 22 4636) is available 24/7; if someone is in crisis and needs help now, call triple zero (000).
14. healthdirect (Australian Government). Anger management. 2025. www.healthdirect.gov.au — Anger is a normal emotion that becomes a problem when it harms relationships or work; time out, slow breathing and exercise can help; a GP, psychologist, MensLine (1300 78 99 78) or 1800RESPECT can help.

Sources were last checked on 5 October 2026. See all sources used on this site on our Sources page.