ADHD and autism in children: Understanding signs, symptoms and support
- Dr Zoe Cross
- 2 days ago
- 5 min read
ADHD and autism are both neurodevelopmental conditions that can affect how children think, learn, communicate and interact with the world around them. Although they share some overlapping characteristics, they are distinct conditions with different patterns of behaviour, attention, social communication and sensory processing. Understanding the signs and symptoms of ADHD and autism can help parents seek the right support and assessment when concerns arise.
You may notice that your child seems to experience the world differently from their peers. They may struggle to concentrate, find social situations challenging, become overwhelmed by sensory experiences, or have difficulty regulating emotions. While these experiences can be part of typical child development, persistent difficulties may indicate ADHD, autism, or in some cases, both.
What are ADHD and autism?
ADHD (Attention Deficit Hyperactivity Disorder) and autism are lifelong neurodevelopmental conditions that affect the way the brain processes information and responds to the environment.
Children with ADHD often experience difficulties with attention regulation, impulse control, executive functioning and hyperactivity. Your child may know what they need to do - but find it difficult to stay focused, manage tasks or control impulsive behaviours.
Autistic children may experience differences in social communication, sensory processing, flexibility of thinking and understanding social situations. Every child with autism is unique, and presentations can vary significantly from one individual to another.
Importantly, neither ADHD nor autism is caused by poor parenting, lack of discipline or environmental factors. Both are recognised neurodevelopmental conditions with strong biological and genetic influences.
Common signs and symptoms of ADHD in children
ADHD symptoms generally fall into three main areas: inattention, hyperactivity and impulsivity.
Do any of these symptoms feel familiar? Children with ADHD may:
Struggle to concentrate on tasks for extended periods
Be easily distracted by their surroundings
Frequently lose belongings or forget instructions
Have difficulty organising schoolwork and daily activities
Appear not to listen when spoken to directly
Fidget, squirm or struggle to remain seated
Talk excessively or interrupt conversations
Act before thinking through consequences
These difficulties can affect school performance, friendships, family relationships and self-esteem.
How ADHD can affect everyday life
Many children with ADHD want to succeed but find everyday expectations difficult to manage. Tasks requiring planning, organisation, working memory and sustained attention can feel particularly challenging.
You may notice repeated reminders are needed, routines become difficult to maintain, or emotional reactions seem more intense than expected for your child's age.
Common signs and symptoms of autism in children
Autism affects children in different ways, but common characteristics often involve social communication, behaviour and sensory processing.
You may recognise these traits. A child with autism may:
Find social interaction difficult or confusing
Prefer predictable routines and familiar environments
Develop highly focused interests
Experience sensory sensitivities to sound, light, textures or smells
Interpret language literally
Find changes in routine upsetting
Show differences in non-verbal communication such as eye contact or body language
Need additional time to process social information
Some autistic children appear quiet and withdrawn, while others are highly social but find social rules difficult to navigate.
Sensory processing and autism
Sensory processing differences are often an important part of autism. Everyday experiences that seem manageable to others may feel overwhelming or uncomfortable.
For example, busy classrooms, loud environments, clothing textures or bright lighting may contribute to distress, anxiety or emotional dysregulation.
Can ADHD and autism look similar?
One reason parents can find ADHD and autism confusing is that both conditions can share certain characteristics.
If your child has either condition they may experience:
Emotional regulation difficulties
Challenges with friendships
Difficulties at school
Executive functioning problems
Sensory sensitivities
Anxiety or low confidence
However, the reasons behind these difficulties are often different.
For example, a child with ADHD may struggle to hold attention because of difficulties regulating focus, while an autistic child may appear disengaged because they are processing social or sensory information differently.
Understanding the differences
While ADHD and autism can share some overlapping characteristics, there are also important differences. If you are looking for a more detailed comparison you may find our guide ADHD vs Autism in children: What's the difference? helpful.
Generally speaking, ADHD is primarily associated with attention regulation, impulsivity and hyperactivity, while autism is more closely associated with social communication differences, sensory processing and flexibility of thinking.
Can a child have ADHD and autism together?
Yes. Research shows that ADHD and autism frequently occur together. A child may experience characteristics of both conditions, including attention difficulties, impulsivity, sensory sensitivities and social communication differences.
For many families, recognising that both conditions can co-exist helps explain why previous support strategies may not have fully addressed their child's needs. A comprehensive assessment can help identify the factors contributing to a child's difficulties and guide appropriate recommendations for support.
Why early identification matters
Early identification does not change who your child is, but it can help your family access the support needed to thrive.
Understanding your child's strengths and challenges can help:
Improve confidence and self-esteem
Support emotional wellbeing
Reduce frustration at home and school
Inform educational strategies
Improve family understanding
Help your child to develop effective coping skills
Many parents report that gaining clarity about their child's experiences brings reassurance and a better understanding of how to support them moving forward.
Understanding neurodiversity
Many families find it helpful to view ADHD and autism through the lens of neurodiversity. This recognises that children experience, process and interact with the world in different ways, with both strengths and challenges.
Neurodiversity encourages a balanced understanding of a child's needs while recognising their abilities, interests and potential. With the right support, many neurodivergent children thrive academically, socially and emotionally.
Seeking professional support
If you have concerns about your child's attention, behaviour, social communication or development, seeking professional advice can be an important first step. It might help you to view this next stage as one where you will be able to frame your child’s challenges in a positive way, and learn how you can navigate it together.
A comprehensive neurodevelopmental assessment can help identify whether ADHD, autism or another developmental difference may be contributing to the difficulties your child is experiencing.
Understanding your child's individual profile allows support to be tailored to their unique strengths, challenges and needs.
FAQs
What are the early signs of ADHD in children?
Early signs of ADHD may include difficulties concentrating, impulsive behaviour, excessive activity levels, forgetfulness, disorganisation and challenges following instructions.
What are the early signs of autism in children?
Common early signs of autism include differences in social communication, sensory sensitivities, strong preferences for routine, highly focused interests and difficulties adapting to change.
Can a child have both ADHD and autism?
Yes. ADHD and autism commonly occur together, and many children meet criteria for both conditions.
How can I tell if my child has ADHD or autism?
ADHD and autism can share some overlapping characteristics, which can make it difficult for you to distinguish between them. Difficulties with attention, behaviour, communication, sensory processing and emotional regulation may have different underlying causes. A professional assessment can help provide clarity and identify the most appropriate support.
Are ADHD and autism lifelong conditions?
Yes. ADHD and autism are lifelong neurodevelopmental conditions. However, with appropriate support, children can develop strategies that help them thrive at home, school and beyond. Often, some of the characteristics of children with ADHD and/or autism can equip them very well for life – from the school subjects they choose, to success in specific areas of work, sport and relationships.
Should I seek an assessment if I am unsure?
If concerns are ongoing and affecting your child's daily life, education, friendships or emotional wellbeing, seeking professional advice can provide clarity, reassurance and guidance about appropriate next steps.
About the author: Reviewed by Dr Zoe Cross, DClinPsy, CPsychol, is a Clinical Psychologist and founder of Cross Psychology. She specialises in neurodivergent conditions including ADHD, autism and cognitive differences such as dyslexia and dyscalculia in children, young people and adults. Zoe is regulated by the Health and Care Professions Council (membership number PYL24596)
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