Something has never quite fitted. Social situations drain you in ways other people don't seem to experience. You've spent years studying how conversations work, rehearsing what to say, masking your natural responses to appear 'normal.' Maybe a friend, partner, or therapist suggested you might be autistic — or maybe you recognised yourself in someone else's story. Whatever brought you here, the question feels big. Let's break it down.
What Autism Looks Like in Adults
Autism is a neurodevelopmental difference that affects how you experience the world — particularly social communication, sensory processing, and patterns of thinking. According to the NHS, common signs of autism in adults include finding it hard to understand what others are thinking or feeling, getting very anxious about social situations, finding it hard to make friends or preferring to be on your own, and taking things very literally.
But the clinical descriptions only tell part of the story. In practice, many autistic adults describe a persistent sense of being different without knowing why. You might find small talk exhausting but can talk for hours about subjects that fascinate you. You might need to decompress after social events, or find that certain textures, sounds or lights feel physically unbearable.
The National Autistic Society highlights that autistic adults may also experience differences in sensory processing — being over-sensitive or under-sensitive to sound, light, touch, taste, or smell. Repetitive behaviours such as hand-flapping, rocking, or fidgeting (sometimes called 'stimming') serve an important regulatory function and are another characteristic feature.
Why So Many Adults Are Only Now Finding Out
Autism was historically associated with a narrow profile: non-speaking children, usually boys, with visible support needs. If you were verbal, academically capable, and could force yourself through social situations, the possibility of autism was rarely considered. Women and people socialised as female were particularly overlooked, as were those who learned to mask their autistic traits from an early age.
Masking — consciously or unconsciously suppressing your natural responses to fit in — is common among autistic adults who weren't identified in childhood. You might have developed elaborate social scripts, learned to mimic others' facial expressions, or forced yourself to tolerate sensory environments that cause you significant distress. This takes an enormous amount of energy and often leads to burnout, anxiety and depression.
The broadening of diagnostic criteria and increased public understanding mean that more adults are now recognising themselves. This isn't a trend or a fad — it's a correction of decades of under-identification.
Autism and ADHD: The Overlap
Research suggests a significant overlap between autism and ADHD, with studies indicating that 50–70% of autistic people also meet the criteria for ADHD. If you relate to both sets of experiences — the social and sensory differences of autism alongside the focus and impulsivity challenges of ADHD — you're not imagining things. Co-occurrence is the norm, not the exception. Our article on whether you can have both autism and ADHD explores this in detail.
Autism is a difference, not a deficit. Many autistic adults describe their diagnosis as the missing context for a lifetime of experiences — not as something being 'wrong' with them, but as an explanation that finally makes sense.
How to Pursue Assessment in the UK
The NHS autism assessment pathway starts with your GP, who can refer you to a specialist diagnostic service. An autism assessment involves detailed discussion of your developmental history, current experiences, and may include input from someone who knew you as a child (a parent or sibling, for example). Assessments are carried out by a multidisciplinary team of autism specialists.
NHS waiting times for adult autism assessment are long — often 18 months to 3 years or more depending on your area. Unlike ADHD, there is currently no established Right to Choose pathway for autism in most regions, which limits your options for reducing the wait through the NHS. Our article on Right to Choose for autism explains the current situation.
Private autism assessment is an alternative, typically costing between £800 and £2,500 depending on the provider and the depth of the assessment. Our clinic directory can help you compare options, wait times and pricing across UK providers.
Steps You Can Take Now
- 1
Start documenting your experiences. Write down specific examples of social difficulties, sensory sensitivities, need for routine, and any childhood patterns you can recall. This will be invaluable during assessment.
- 2
Take a screening questionnaire. The AQ-10 (Autism Quotient) is the standard NHS screening tool. Our free screening chatbot covers similar ground and can help you organise your thoughts before approaching your GP.
- 3
Talk to your GP. Ask for a referral to your local adult autism diagnostic service. Bring your notes. If your GP seems unsure about adult referrals, the NICE guideline CG142 is clear that adults should be referred if autism is suspected.
- 4
Explore your options while you wait. A long waiting list doesn't mean you're stuck. Learning about autism, connecting with autistic communities, and understanding your own needs can be transformative — with or without a formal diagnosis.
- 5
Consider workplace support. If autism affects your work, you may be eligible for Access to Work funding. This applies whether you're employed or self-employed. Our Access to Work calculator can estimate what you might qualify for.
What If You Recognise Yourself But Don't Want a Formal Diagnosis?
Not everyone wants or needs a formal diagnostic label. Some people find that self-identification is enough to make meaningful changes in their lives — adjusting their environment, setting better boundaries, and understanding their needs. A formal diagnosis does unlock certain legal protections under the Equality Act 2010 and access to funded support such as Access to Work, but the decision is yours.
Our article on self-diagnosis and what clinicians think explores this topic further.
Sources
NHS — Signs of autism in adults · NHS — How to get an autism assessment · National Autistic Society — Signs of autism · NICE Guideline CG142 — Autism spectrum disorder in adults
Wondering if you might be autistic?
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