ADHD and anxiety: the differences, the overlap, and autism

Page summary

ADHD and anxiety are different conditions that can look alike and often occur together. ADHD is lifelong and starts in childhood, while an anxiety disorder centres on worry or fear. Both can affect focus, restlessness and sleep, so one is easily mistaken for the other. Many autistic people live with high levels of anxiety as well. Knowing the differences helps you tell them apart and decide when to ask for help. AuDHD Psychiatry assesses ADHD and autism in adults and children, online.

Reviewed by Dr Darren O’Reilly. Dr Darren O’Reilly is a Chartered Psychologist and Clinical Director.

Published date: 31 March 2026

Review and publication details

Clinically reviewed by Dr Darren O’Reilly, DPsych, Chartered Psychologist (CPsychol), HCPC registered practitioner psychologist, registration number PYL041661 (check the HCPC register).

AuDHD Psychiatry is the trading name of ADHDdegree Ltd, a company registered in Scotland, company number SC822923. Registered office: 3f1 Third Floor, Hill Street, Edinburgh, EH2 3JP. Registered with the ICO, number ZB823033.

Some people spend years treating worry that never quite fits, or being told they’re just anxious. It’s worth noticing if the worry comes after the daily struggle rather than before it. You aren’t making a fuss by asking what’s really going on.

At a glance

  • ADHD: a lifelong condition affecting attention, activity and impulses, with signs that usually start before age 12 [1].
  • Generalised anxiety disorder (GAD): a condition where you often feel anxious about lots of things, and the worry is hard to control [2].
  • What overlaps: trouble concentrating and feeling restless are signs of both [1][2].
  • Together: you can have ADHD and anxiety at once, and a specialist assessing ADHD also checks for coexisting conditions [3].
  • Autism and anxiety: anxiety isn’t part of autism itself, but many autistic people live with high levels of it [4].
  • Telling them apart: ADHD should be diagnosed by a trained specialist, using your history and reports from people who know you [3].

➨ Table of Contents

What ADHD and anxiety have in common

ADHD and anxiety share several everyday signs, which is why they’re often mixed up. Generalised anxiety disorder can make it hard to concentrate, leave you restless or irritable, and disrupt your sleep [2]. ADHD brings its own versions: being easily distracted, fidgeting, feeling restless and finding it hard to wait [1]. On a busy day, it can be hard to tell which one is at work.

The same sign can have very different roots. In ADHD, the attention problem is there whether or not you’re worried, on calm days as well as stressful ones. In anxiety, worry takes up the space that attention needs, so focus tends to rise and fall with the worry. Irritability and broken sleep can follow the same split. Clinicians therefore look at how each sign behaves across different days and settings.

How ADHD and anxiety differ

ADHD and anxiety differ most in when they start and what drives them. ADHD signs usually begin before age 12 [1]. NICE guidance expects them to show in two or more important settings, such as home and work [3]. A GP can diagnose GAD in adults after at least six months of frequent anxiety [2]. The worry also has to affect daily life and be hard to control [2].

Restlessness feels different too. ADHD restlessness tends to be about energy and impulses, a need to move or act. Anxious restlessness is about tension and worry, a body braced for something to go wrong. Big feelings can come from ADHD too. Our guide to ADHD and emotional dysregulation explains how.

Can you have ADHD and anxiety at the same time?

Yes, you can have ADHD and anxiety at the same time. People with ADHD often have other conditions too, such as anxiety or depression [1]. In children, a GP can also consider anxiety as one possible cause of ADHD-like signs [1]. So an anxiety disorder and ADHD can sit side by side, or one can be mistaken for the other.

Living with ADHD that nobody has recognised can be stressful in its own right. Some people find the two feed each other, so a forgetful, chaotic week brings more worry. Each one needs its own care, so it helps to keep both in view.

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Autism and anxiety

Many autistic people live with high anxiety, though it isn’t part of autism [4]. The National Autistic Society cites a consensus that around 40 to 50% of autistic people may receive a clinical anxiety diagnosis [4]. Anxiety in autistic people often has clear triggers in the world around them.

Difficult social situations, busy sensory environments and an unexpected change to routine can all raise it [4]. Finding it hard to name your own emotions can add to it, and so can autistic masking [4]. Feeling misunderstood or not accepted can add to it as well [4]. Professionals working with autistic children and young people are asked by NICE to recognise anxiety as a common coexisting condition [5].

How a clinician tells them apart

A clinician tells ADHD and anxiety apart from your history, not from one symptom. ADHD should only be diagnosed by a specialist with training in ADHD [3]. The specialist uses a full clinical and psychosocial assessment, your developmental and psychiatric history, and reports from people close to you [3]. Your childhood matters here, because a lifelong pattern points somewhere different from recent worry. The difficulties also need to cause at least moderate impairment in two or more important settings [3]. The assessment also checks for coexisting conditions, such as anxiety [3]. If anxiety comes up in an assessment with us, our report mentions it, so you can take it to your GP.

At AuDHD Psychiatry, our assessments look at ADHD, autism, or both together. You receive an outcome letter the next day and the full report within two weeks. The report says what we found, and you can share it with your GP. We don’t diagnose or treat anxiety disorders.

What helps when you have ADHD and anxiety

Treating one condition doesn’t always settle the other, so a plan should cover both. For GAD, a GP will usually suggest talking therapy first, most often cognitive behavioural therapy (CBT) [2]. Having an anxiety disorder doesn’t change the ADHD medication choices you should be offered, NICE says [3]. Our guide to how ADHD medication works explains the options in plain words. For autistic children and young people with anxiety, NICE says to consider CBT adapted to their needs [5]. Changes can include more visual and written material, a clearer structure and regular breaks [5]. Tell whoever treats you about both conditions, so the plan covers each one.

When to ask for help

These pointers can help you decide what to do next.

An ADHD or autism assessment may help if:

  • focus, restlessness or impulsive habits go back to childhood.
  • anxiety treatment helped a little, but the core difficulties stayed.
  • you’ve wondered about ADHD or autism for years.

It might not be right today if:

  • anyone needs urgent help now. Call NHS 111 and choose the mental health option, or in Northern Ireland call Lifeline free on 0808 808 8000, any time. In an emergency, call 999 or go to A&E [6].
  • anxiety is your main worry and you haven’t seen a GP.

AuDHD Psychiatry assesses adults and children in the UK online, with no GP referral. Choose a private ADHD assessment, an autism assessment or a combined AuDHD assessment. A free 15-minute call can help you choose, and it’s an information call, not an assessment.

Talk to our qualified, compassionate team.

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Questions people ask

Yes, ADHD can be mistaken for anxiety, because both can affect concentration and leave you feeling restless [1][2]. Irritability and poor sleep can blur the picture further. A pattern that began in childhood and stays steady, whatever your stress level, points more towards ADHD. Worry that rises and falls with pressure points more towards anxiety.

There’s no simple cause and effect, but people with ADHD often have anxiety as well [1]. Years of forgetting things, running late and catching up can wear anyone down. Worry often grows out of that strain. Anxiety can also exist on its own, with no ADHD behind it.

Yes, NICE says people with ADHD and an anxiety disorder should be offered the same medication choices as anyone else [3]. Your prescriber looks at both conditions together before suggesting any medication. Our ADHD medication page sets out the options in more detail.

No, AuDHD Psychiatry assesses ADHD and autism, not anxiety disorders. Anxiety is still worth raising with your GP, whether or not you have an assessment with us. Your GP can assess anxiety and talk you through options such as talking therapy [2]. An ADHD or autism assessment looks at different questions, so it doesn’t replace that conversation.

Many autistic people face difficult social situations, sensory overload and sudden changes, and each can raise anxiety [4]. Masking to fit in can add to the strain [4]. Because many triggers sit in the world around you, changing your surroundings can help as well as changing how you cope. Quieter spaces, clear plans and warning before changes are simple examples.

In short

ADHD and anxiety share some signs but grow from different roots, and plenty of people live with both. Many autistic people know anxiety well too, often because of the world around them. Telling the conditions apart takes a specialist’s look at your whole history, not one hard week. If you’re unsure which one fits, a free 15-minute call can help you choose a next step.

Related

Sources

  1. NHS, ADHD in children and young people: symptoms and getting help, https://www.nhs.uk/conditions/attention-deficit-hyperactivity-disorder-adhd/symptoms/ (read 01/10/2026)
  2. NHS, Generalised anxiety disorder (GAD), https://www.nhs.uk/mental-health/conditions/generalised-anxiety-disorder/overview/ (read 01/10/2026)
  3. NICE, guideline NG87, Attention deficit hyperactivity disorder: diagnosis and management, 2018, https://www.nice.org.uk/guidance/ng87/chapter/Recommendations (read 01/10/2026)
  4. National Autistic Society, Anxiety, https://www.autism.org.uk/advice-and-guidance/topics/mental-health/anxiety (read 01/10/2026)
  5. NICE, guideline CG170, Autism spectrum disorder in under 19s: support and management, 2013, https://www.nice.org.uk/guidance/cg170/chapter/Recommendations (read 01/10/2026)
  6. nidirect, Mental health emergency: if you’re in crisis or despair, https://www.nidirect.gov.uk/articles/mental-health-emergency-if-youre-crisis-or-despair (read 29/09/2026)

About AuDHD Psychiatry

AuDHD Psychiatry is the trading name of ADHDdegree Ltd, a company registered in Scotland. The company number is SC822923. Our registered office is 3f1 Third Floor, Hill Street, Edinburgh, EH2 3JP.

Registered with the ICO, number ZB823033.

Last updated: 13 October 2026

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