Autism and Anxiety: Understanding One of the Most Common Co-occurring Conditions

adminaspect
Jul 2
5 min read

When people think about autism, they often think about differences in communication, social interaction, sensory processing or routines. What is perhaps less well known is that many autistic people also experience anxiety.

In fact, anxiety is one of the most common co-occurring conditions associated with autism. Research consistently shows that autistic children and adults are significantly more likely to experience anxiety disorders than the general population. For many people, anxiety can have just as much impact on daily life as autism itself.

Understanding why anxiety is so common in autistic people can help families, professionals and autistic individuals recognise the signs earlier and access the right support.

What is anxiety?

Everyone feels anxious from time to time. Anxiety is a normal human response to situations that feel uncertain, stressful or threatening. It can help us prepare for challenges or avoid danger.

However, when anxiety becomes persistent, overwhelming or begins to interfere with everyday life, it may develop into an anxiety disorder.

There are several different types of anxiety disorder, including:

Generalised Anxiety Disorder (GAD)
Social Anxiety Disorder
Panic Disorder
Specific Phobias
Separation Anxiety
Agoraphobia

Many autistic people experience one or more of these conditions alongside their autism.

How common is anxiety in autistic people?

Studies suggest that anxiety disorders occur far more frequently in autistic people than in the general population. Estimates vary depending on the age group and the methods used by researchers, but anxiety is consistently identified as one of the most common co-occurring conditions.

Large reviews of the evidence estimate that around one in four autistic adults meet the criteria for an anxiety disorder at any given time, with lifetime rates considerably higher. Other research has found even higher rates in autistic children and adolescents, with many experiencing clinically significant anxiety symptoms.

Why is anxiety so common in autism?

There is no single explanation. Instead, researchers believe anxiety develops through a combination of neurological, psychological and environmental factors.

Living in a world not designed for autistic people

Many aspects of everyday life can be unpredictable and overwhelming.

An autistic person may need to navigate:

Unexpected changes to routines
Busy, noisy environments
Bright lights or strong smells
Social situations with unclear expectations
Frequent misunderstandings
Pressure to make eye contact or socialise in neurotypical ways

For someone whose brain processes information differently, these experiences can create a constant state of heightened alertness.

Sensory overload

Many autistic people experience sensory sensitivities.

Sounds that others barely notice may feel painfully loud. Bright lighting, crowded spaces or multiple conversations happening at once can quickly become overwhelming.

When sensory overload occurs repeatedly, it is understandable that a person may begin to anticipate these situations with anxiety.

Intolerance of uncertainty

Many autistic people find uncertainty particularly stressful.

Questions such as:

"What is going to happen?"
"Who will be there?"
"What if the plan changes?"

can become significant sources of anxiety.

Knowing what to expect often helps autistic people feel safe and able to cope. Unexpected changes can therefore be particularly distressing.

Social experiences

Social interaction can be exhausting, particularly when someone has spent years trying to understand unwritten social rules.

Some autistic people describe constantly analysing conversations, worrying about saying the wrong thing or replaying interactions afterwards.

Repeated experiences of bullying, exclusion or misunderstanding can also contribute to long-term anxiety.

Masking

Many autistic people consciously or unconsciously hide their autistic traits in order to fit in.

This process, known as masking or camouflaging, may involve copying other people's behaviour, forcing eye contact, suppressing stimming or rehearsing conversations in advance.

While masking may help someone appear to cope on the outside, it often comes at a significant emotional cost. Research increasingly suggests that prolonged masking is associated with increased anxiety, exhaustion and autistic burnout.

How anxiety may look different in autistic people

Anxiety is not always easy to recognise.

Some autistic people may struggle to identify or describe their emotions, meaning anxiety is expressed through behaviour rather than words.

Signs might include:

Increased need for routines
More frequent stimming
Avoiding certain places or situations
Irritability
Emotional outbursts or meltdowns
Shutdowns
Difficulty sleeping
Physical symptoms such as headaches, stomach aches or muscle tension
Increased repetitive behaviours

These behaviours are often misunderstood as "challenging behaviour" when they may actually be signs that someone feels unsafe or overwhelmed.

Anxiety or autism?

One of the challenges for professionals is that autism and anxiety can sometimes look similar.

For example:

Avoiding social situations could reflect social anxiety or a preference for limited social interaction.
Repetitive behaviours may be comforting autistic behaviours or compulsions associated with anxiety.
Difficulty speaking may reflect autistic communication differences or anxiety in a particular situation.

Because of this overlap, assessment should always consider the individual's wider experiences rather than focusing on isolated behaviours.

Supporting autistic people with anxiety

The good news is that anxiety can often be reduced with the right support.

What works will vary from person to person, but support may include:

Creating predictable routines where possible
Preparing for changes in advance
Reducing unnecessary sensory demands
Providing clear and concrete communication
Allowing time to process information
Identifying triggers for anxiety
Developing personalised coping strategies
Accessing psychological therapies adapted for autistic people

Some autistic people benefit from Cognitive Behavioural Therapy (CBT), particularly when it has been adapted to take account of autistic communication styles, sensory differences and thinking patterns. Standard approaches may not always be effective without these adaptations.

A strengths-based perspective

It is important to remember that anxiety is not an inevitable part of being autistic.

Many autistic people thrive when they are understood, accepted and supported in environments that accommodate their needs.

Rather than asking autistic people to fit into environments that constantly overwhelm them, we should also ask how schools, workplaces and society can become more autism-friendly.

Reducing unnecessary stressors, embracing neurodiversity and making reasonable adjustments can make a profound difference to mental wellbeing.

Final thoughts

Anxiety is one of the most common co-occurring conditions experienced by autistic people, but it is also one of the most misunderstood.

Recognising anxiety early, understanding why it occurs and providing autism-informed support can significantly improve quality of life.

By listening to autistic experiences and moving beyond assumptions, we can create environments where autistic people feel safe, understood and able to flourish.