Autism and ADHD in Children Explained (AuDHD): Signs, Differences & Diagnosis UK

Autism and ADHD are both forms of neurodivergence that affect how a person experiences, processes and interacts with the world. Many individuals experience traits of both, and a combined child autism and ADHD assessment can help provide clarity and understanding.

Learn more about our combined child autism and ADHD assessment here.

What is Autism?

Autism is a neurodevelopmental difference that shapes how a person communicates, experiences social interaction, processes sensory information and engages with the world around them.

Autism is often described as a spectrum, meaning it presents differently in every individual, with a wide range of strengths, preferences and support needs.

What is ADHD?

ADHD (Attention Deficit Hyperactivity Disorder) is a neurodevelopmental difference that affects attention, focus, organisation and impulse regulation.

It is commonly described across areas such as:

• Inattention

• Hyperactivity

• Impulsivity

People with ADHD may experience differences in concentration, energy levels and executive functioning, often alongside strengths such as creativity, spontaneity and enthusiasm.

Autism and ADHD Together (AuDHD)

Autism and ADHD frequently co-occur, meaning many individuals experience traits of both. This is sometimes referred to as AuDHD.

Because there is overlap between traits, a combined autism and ADHD assessment can help identify whether:

• Autism is present

• ADHD is present

• Or both (a dual diagnosis)

Understanding this combined profile can help individuals and families access the right support and better understand day-to-day experiences.

If you recognise traits of both autism and ADHD, a combined assessment can help provide clarity and the right support. Learn more about our combined autism and ADHD assessments.

A Neurodiversity-Affirming Perspective

Autism and ADHD are part of neurodiversity, which recognises that differences in how people think, feel and process information are natural variations of the human brain.

Rather than viewing these differences as something to be “fixed,” a neurodiversity-affirming approach focuses on:

• Understanding individual needs

• Recognising strengths

• Providing supportive environments

Core Features of Autism and ADHD:

Autistic Traits

Some autistic individuals may:

• Prefer deep, meaningful or interest-based conversations

• Communicate in a direct and honest way

• Experience sensory differences (e.g. sensitivity to noise, light or textures)

• Find social situations or group settings overwhelming

• Prefer routine, predictability and structure

• Experience differences in emotional regulation

• Have strong attention to detail and specialist interests

ADHD Traits

Some individuals with ADHD may:

• Experience differences in attention and focus

• Hyperfocus on interests while struggling with less engaging tasks

• Find organisation, planning and starting tasks challenging

• Forget everyday tasks or lose track of information

• Feel restless or need movement to regulate attention

• Act or speak impulsively, including interrupting or talking over others

• Show high levels of energy, creativity and enthusiasm

Overlapping Traits (Autism & ADHD)

There are several shared or overlapping traits, which is why a combined child autism and ADHD assessment is important:

• Sensory differences

• Stimming or fidgeting

• Emotional overwhelm or shutdowns

• Strong focus on interests (hyperfocus)

• Differences with planning, organisation and time management

• Social fatigue or difficulty navigating social expectations

Many families choose a Combined Autism and ADHD Assessment when traits overlap in this way

When to consider a combined autism and ADHD assessment for your child?

If you recognise a mix of these traits, a combined autism and ADHD assessment can help provide clarity, validation and guidance on next steps.

Learn more about our combined child autism and ADHD assessment process

Or contact our team to discuss your concerns