Health & wellbeing · UK guide
ADHD and Autism in Adults UK: Signs, Assessment and Support
By JASOTO · Updated 3 October 2026
Wondering whether ADHD, autism or both could explain parts of your experience? You are not alone. This guide explains what to look into, how assessment works and where to start getting support.
This is general information, not a diagnosis or medical advice. A diagnosis can only be made through an appropriate professional assessment.
What ADHD and autism mean
ADHD is a neurodevelopmental condition that can affect attention, activity levels and impulse control. Autism is a lifelong difference in how someone communicates, experiences the world and processes sensory information. Neither is a character flaw, and people can have very different strengths and support needs.
Possible signs in adults
ADHD may involve
- difficulty organising time or finishing tasks
- forgetfulness, losing things or distractibility
- restlessness, impulsive decisions or interrupting
- periods of intense focus on an interesting task
Autism may involve
- sensory differences or a need for predictable routines
- communication differences or taking language literally
- deep, focused interests and repetitive movements
- exhaustion from masking or adapting socially
These examples are not a checklist. Anxiety, depression, trauma, sleep problems and other conditions can overlap with or contribute to similar experiences. A professional assessment looks at your history and how things affect everyday life.
How to seek an assessment in the UK
- Write down the situations that are difficult now, with specific examples from work, education, relationships and daily routines.
- Ask a GP or another appropriate health professional about an ADHD or autism assessment and what local route is available.
- Gather childhood information if possible, such as school reports or observations from someone who knew you then.
- Ask what support is available while you wait. Waiting times and referral arrangements vary across the UK.
In England, NHS guidance explains that some people may be able to use Right to Choose for eligible services. Check the current rules with your GP or NHS service rather than relying on an old social-media post.
Support does not have to wait for a diagnosis
Small environmental changes can help: written instructions, reminders, predictable routines, quieter spaces, planned breaks and breaking large tasks into smaller steps. At work or in education, ask about reasonable adjustments and speak with the relevant support team. Charities and peer-led organisations can also offer practical information and community.
If you are struggling with your mental health or feel unsafe, contact your local NHS urgent mental health or crisis service. Call 999 if you or someone else is in immediate danger.
Common questions
Can someone be autistic and have ADHD?
Yes. ADHD and autism can occur together. Only a qualified assessment can establish whether either diagnosis applies to you.
Can I ask my GP for an assessment?
Yes. A GP can discuss your concerns, consider other explanations and explain local referral options. In England, ask about available NHS pathways and whether Right to Choose may apply.
Should I use an online quiz to diagnose myself?
Online checklists can help you organise questions, but they are not a diagnosis. Bring examples from childhood and current life to a qualified professional instead.