Anxiety is very common in autistic adults, but it is not part of autism itself. The National Autistic Society says it "is not part of the autism diagnostic criteria". The best pooled estimate we found for adults comes from a 2019 review of 35 studies. About 27% of autistic adults had an anxiety disorder when studied. About 42% had one at some point in their lives.
The HSE lists common drivers: hard social situations, feeling misunderstood, masking, difficulty identifying emotions, sensory overload and unexpected change. Anxiety can also look different in autistic people. It may show up as a meltdown or shutdown rather than as worry someone can put into words.
The good news is that anxiety in autistic adults can be treated. NICE says talking therapies such as CBT should be adapted, for example with more written and visual material. The evidence on medication is thinner than many people assume.
Figures vary a lot depending on who was studied and how. Two large reviews are the most useful starting points:
The adult review also found 23% had current depression. Its authors warn that many studies relied on clinical samples, and that questionnaire-based studies gave different estimates. The all-ages review found higher figures in clinic-based studies than in population and registry studies.
So the honest summary is this: anxiety is common enough that any autistic adult, and any clinician working with them, should ask about it. The exact number depends on the study.
The HSE lists these causes of anxiety in autistic people:
Research adds detail to some of these.
Uncertainty. Many autistic people find the unknown especially hard. A 2020 review of 12 studies looked at this "intolerance of uncertainty". Nine of the 10 studies with usable statistics found a significant link with anxiety. The strength of the link was similar to that seen in non-autistic people. That matters, because it suggests approaches that target uncertainty may work for autistic adults too.
Naming emotions. Alexithymia means difficulty identifying and describing your own feelings. A 2019 review of 15 studies found it in about 50% of autistic participants, compared with about 5% of non-autistic participants. It was common, not universal. If you struggle to name what you feel, anxiety may show up first as a racing heart or an upset stomach.
Masking. Hiding autistic traits to fit in takes constant effort. We cover the research on masking in our guide to autism in women and masking.
Anxiety in autistic adults can include the familiar signs. The HSE lists feeling on edge or irritable, a sense of dread, difficulty concentrating, dizziness, sweating and shortness of breath. Panic attacks can happen too.
But it can also look like other things.
Meltdowns. The National Autistic Society describes a meltdown as "an intense response to an overwhelming situation". The person temporarily loses control of their behaviour. It is not a tantrum. Signs of building distress often come first, such as pacing, repeated questions, rocking or going very still.
Shutdowns. An NHS trust guide describes shutdowns as the "freeze" response. A person may stop talking, want to hide away, feel suddenly drained of energy, or find decisions impossible.
Exhaustion and withdrawal. The NAS says high anxiety can lead to exhaustion and to autistic burnout. That is a different pattern from depression, though both can happen together. Our guide to autistic burnout explains the difference.
This is one of the hardest questions in an assessment. Social difficulty is part of autism. Social anxiety disorder is a separate condition, centred on fear of being judged. Both can be present.
NICE's adult autism guideline (CG142) specifically names social anxiety disorder and obsessive-compulsive disorder. It lists them among conditions to consider during an autism assessment, either as an alternative explanation or as a co-occurring condition. For how social anxiety differs from generalised worry, see our guide to GAD vs social anxiety.
Standard anxiety questionnaires were not designed with autistic people in mind. A 2020 study said there were "no existing measures of anxiety designed and validated specifically for autistic adults". Its authors developed one, the Anxiety Scale for Autism–Adults, with autistic people. In a later study using it, "uncertainty" was the highest-scoring factor for autistic participants.
If a short questionnaire does not capture what you experience, say so. Describe what actually happens, in specific situations.
NICE says autistic adults with a co-occurring mental health condition should be offered psychological treatment based on NICE guidance for that condition. In other words, anxiety in an autistic adult is treated as anxiety, with changes to how therapy is delivered.
NICE CG142 says those changes should include:
NICE also says therapists should understand autism and consider advice from a specialist autism team. The HSE gives similar advice: "Look for counselling or therapy options adapted to meet the needs of autistic people."
How strong is the evidence? A 2023 review pooled 71 trials of mental health interventions in autistic people. For autistic people without an intellectual disability, it concluded that "some forms of cognitive behavioural therapy and mindfulness therapy may be helpful". It also said more research is needed, and that trials only followed people for short periods. Until there is more evidence, it said, treatment should follow the evidence for non-autistic people.
For an overview of what works for anxiety in general, see what actually works for anxiety.
NICE says autistic adults with a co-occurring mental health condition should be offered medication based on NICE guidance for that condition. It adds two cautions for prescribers:
NICE also says any treatment should be reviewed regularly, for benefits and side effects. Separately, it says antidepressants should not be used for the routine management of the core features of autism. That is a different question from treating anxiety.
The research gap here is real. The National Autistic Society says there is "very little research" into whether antidepressants help anxiety specifically in autistic people. It says autistic people may be more likely to have side effects such as drowsiness, irritability and reduced activity.
STRATA is a trial of sertraline versus placebo for anxiety in autistic adults, run in the UK and Australia. Its 2024 protocol made the same point. It said SSRIs are commonly prescribed for this, but their effectiveness and side effects in autistic adults "are not well known". We could not find the trial's main results published when we checked in November 2026.
None of this means medication is wrong for you. It means the decision is worth discussing carefully with your GP or psychiatrist, with regular reviews. Do not stop a prescribed medicine suddenly without talking to your doctor.
The HSE and the National Autistic Society suggest similar everyday strategies:
The HSE notes that sleep problems are common in autistic adults. The HSE also says anxiety can make it harder to get or stay asleep, and that sleep is important for mental health. Talk to your GP if sleep is a problem.
Start with your GP. The HSE says you can use its services without a formal autism diagnosis. For anxiety, the HSE says your GP can:
Tell your GP you are autistic, or think you may be, and ask whether therapy can be adapted. If you are looking for an autism assessment as well, see our guide to adult autism assessment in Ireland.
AsIAm's Autism Information Line (0818 234 234, Monday to Thursday, 10am to 3pm) can help with information. It is not a crisis service.
In England, you can usually refer yourself to NHS Talking Therapies for anxiety. You need to be registered with a GP and aged 18 or over (16 in some areas). The National Autistic Society's services directory lists therapists with autism experience. Your GP can also refer you.
If you feel unable to keep yourself safe, or are thinking about suicide:
No. The National Autistic Society says anxiety is not part of the autism diagnostic criteria. It is a separate condition that is common in autistic people, and it can be treated.
It can, if it is adapted. NICE recommends a more structured, concrete and visual approach. A 2023 review found some forms of CBT and mindfulness "may be helpful" for autistic people without an intellectual disability. It said more research is needed.
They are linked but not the same. Anxiety is a feeling of worry or fear that can build over time. A meltdown is an intense response to being completely overwhelmed, with a temporary loss of control. Anxiety is a common trigger for meltdowns.
No. In Ireland, the HSE says you can use its services without a formal diagnosis. Anxiety is treated in its own right.
Proco is preparing clinician-led adult assessments in Ireland. You can read about how they will work.
This article is general information, not medical advice. It cannot tell you whether you are autistic or have an anxiety disorder. Talk to your GP or a qualified clinician about your own situation. Do not change or stop any medicine without speaking to your prescriber.
Reviewed by: Proco Team
Last updated: November 2026